Articles | Volume 10, issue 4
https://doi.org/10.5194/se-10-1181-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-10-1181-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
A revised map of volcanic units in the Oman ophiolite: insights into the architecture of an oceanic proto-arc volcanic sequence
Thomas M. Belgrano
CORRESPONDING AUTHOR
Institute of Geological Sciences, University of Bern, Baltzerstrasse
3, 3012 Bern, Switzerland
Larryn W. Diamond
Institute of Geological Sciences, University of Bern, Baltzerstrasse
3, 3012 Bern, Switzerland
Yves Vogt
Institute of Geological Sciences, University of Bern, Baltzerstrasse
3, 3012 Bern, Switzerland
Andrea R. Biedermann
Institute of Geological Sciences, University of Bern, Baltzerstrasse
3, 3012 Bern, Switzerland
Institute for Rock Magnetism, University of Minnesota, 100 Union St
SE, 55455 Minneapolis, USA
Samuel A. Gilgen
Institute of Geological Sciences, University of Bern, Baltzerstrasse
3, 3012 Bern, Switzerland
Khalid Al-Tobi
National Earth Secrets Co., P.O. Box 1242, PC 130 Athaibah, Muscat,
Sultanate of Oman
Cited articles
A'Shaikh, D., Miyashita, S., and Matsueda, H.: The petrological and
geochemical characteristics of an ophiolite volcanic suite from the Ghayth
area of Oman, J. Miner. Petrol. Sci., 100,
202–220, https://doi.org/10.2465/jmps.100.202, 2005.
Adachi, Y. and Miyashita, S.: Geology and petrology of the plutonic
complexes in the Wadi Fizh area: Multiple magmatic events and segment
structure in the northern Oman ophiolite, Geochem., Geophy.
Geosy., 4, 8619, https://doi.org/10.1029/2001GC000272, 2003.
Alabaster, T. and Pearce, J. A.: The interrelationship between magmatic and
ore-forming hydrothermal processes in the Oman ophiolite, Econ. Geol.,
80, 1–16, https://doi.org/10.2113/gsecongeo.80.1.1, 1985.
Alabaster, T., Pearce, J. A., Mallick, D. I. J., and Elboushi, I. M.: The
volcanic stratigraphy and location of massive sulphide deposits in the Oman
ophiolite, in: Proceedings of the International Ophiolite Symposium 1979, Cyprus,
edited by: Panayiotou A., 751–757, Cyprus Geological Survey
Department, Nicosia, 1978.
Alabaster, T., Pearce, J. A., and Malpas, J.: The volcanic stratigraphy and
petrogenesis of the Oman ophiolite complex, Contrib. Mineral. Petr., 81, 168–183, https://doi.org/10.1007/BF00371294, 1982.
Ambrose, T. K. and Searle, M. P.: 3D structure of the northern Oman – UAE
ophiolite: widespread, short-lived, supra-subduction zone magmatism,
Tectonics, 38, 233–252, https://doi.org/10.1029/2018TC005038, 2018.
Arai, S., Kadoshima, K., and Morishita, T.: Widespread arc-related melting in
the mantle section of the northern Oman ophiolite as inferred from detrital
chromian spinels, J. Geol. Soc., 163, 869–879,
https://doi.org/10.1144/0016-76492005-057, 2006.
Arculus, R. J., Ishizuka, O., Bogus, K. A., Gurnis, M., Hickey-Vargas, R.,
Aljahdali, M. H., Bandini-Maeder, A. N., Barth, A. P., Brandl, P. A., Drab,
L., do Monte Guerra, R., Hamada, M., Jiang, F., Kanayama, K., Kender, S.,
Kusano, Y., Li, H., Loudin, L. C., Maffione, M., Marsaglia, K. M., McCarthy,
A., Meffre, S., Morris, A., Neuhaus, M., Savov, I. P., Sena, C., Tepley III,
F. J., van der Land, C., Yogodzinski, G. M., and Zhang, Z.: A record of
spontaneous subduction initiation in the Izu–Bonin–Mariana arc, Nat.
Geosci., 8, 728, https://doi.org/10.1038/NGEO2515, 2015.
Ballhaus, C., Fonseca, R. O. C., Münker, C., Kirchenbaur, M., and Zirner,
A.: Spheroidal textures in igneous rocks – Textural consequences of H2O
saturation in basaltic melts, Geochim. Cosmochim. Acta, 167,
241–252, https://doi.org/10.1016/j.gca.2015.07.029, 2015.
Belgrano, T. M. and Diamond, L. W.: Subduction-zone contributions to axial
volcanism in the Oman-U.A.E. ophiolite, Lithosphere, 11, 399–411,
https://doi.org/10.1130/L1045.1, 2019.
Belgrano, T. M., Diamond, L. W., Vogt, Y., Biedermann, A. R., Gilgen, S. A., and Al-Tobi, K.: Geochemical compositions (XRF, LA-ICP-MS, EMPA) and bulk magnetic properties of volcanic rocks used for mapping in the northern Semail ophiolite (Oman), PANGAEA, https://doi.org/10.1594/PANGAEA.899794, 2019.
Blakely, R. J.: Potential Theory in Gravity and Magnetic Applications,
Cambridge University Press, Cambridge, 1995.
BME (Bishimetal Exploration): Geological Map of Al Wasit (Scale:1:50 000:
Sheet NG40-14 E-III), Ministry of Petroleum and Minerals, Sultanate of Oman,
1987a.
BME (Bishimetal Exploration): Geological Map of Mahab (Scale:1:50 000: Sheet
NG40-14 F-IV), Ministry of Petroleum and Minerals, Sultanate of Oman, 1987b.
BME (Bishimetal Exploration): Geological Map of Wadi Bani Umar (Scale 1:50 000: Sheet NG40-14E-II), Ministry of Petroleum and Minerals, Sultanate of
Oman, 1987c.
Boudier, F. and Al-Rajhi, A.: Structural control on chromitite deposits in
ophiolites: the Oman case, Geol. Soc. London Spec. Pub.,
392, 263–277, https://doi.org/10.1144/sp392.14, 2014.
BRGM (Bureau de Recherches Geìologique et Minères): Geological Map of As
Suwayq (Scale 1:100 000: Sheet NF40-3A), Ministry of Petroleum and Minerals,
Sultanate of Oman, 1986a.
BRGM (Bureau de Recherches Geìologique et Minères): Geological Map of
Yanqul (Scale 1:100 000: Sheet NF40-2C), Ministry of Petroleum and Minerals,
Sultanate of Oman, 1986b.
BRGM (Bureau de Recherches Geìologique et Minères): Geological Map of Aswad
(Scale 1:50 000: Sheet NG40-14B1/B2), Ministry of Petroleum and Minerals,
Sultanate of Oman, 1993a.
BRGM (Bureau de Recherches Geìologique et Minères): Geological Map of Fizh
(Scale 1:50 000: Sheet NG40-14B4), Ministry of Petroleum and Minerals,
Sultanate of Oman, 1993b.
Cameron, W. E.: Petrology and origin of primitive lavas from the Troodos
ophiolite, Cyprus, Contrib. Mineral. Petr., 89,
239–255, https://doi.org/10.1007/BF00379457, 1985.
Clark, D. A.: Magnetic petrophysics and magnetic petrology: aids to
geological interpretation of magnetic surveys, AGSO J. Austral.
Geol. Geophys., 17, 83–103, 1997.
Clark, D. A.: Methods for determining remanent and total magnetisations of
magnetic sources – A review, Explor. Geophys., 45, 271–304,
https://doi.org/10.1071/EG14013, 2014.
Cotta, A. J. B. and Enzweiler, J.: Certificate of Analysis of the Reference Material BRP-1 (Basalt Ribeirão Preto), Geostand. Geoanal. Res., 32, 231–235, https://doi.org/10.1111/j.1751-908X.2008.00894.x, 2008.
DeBari, S. M., Taylor, B., Spencer, K., and Fujioka, K.: A trapped Philippine
Sea plate origin for MORB from the inner slope of the Izu-Bonin trench,
Earth Planet. Sci. Lett., 174, 183–197,
https://doi.org/10.1016/S0012-821X(99)00252-6, 1999.
de Graaff, S. J., Goodenough, K. M., Klaver, M., Lissenberg, C. J., Jansen,
M. N., Millar, I., and Davies, G. R.: Evidence for a Moist to Wet Source
Transition Throughout the Oman-UAE Ophiolite, and Implications for the
Geodynamic History, Geochem. Geophy. Geosy., 20, 651–672,
https://doi.org/10.1029/2018GC007923, 2019.
Dilek, Y. and Furnes, H.: Lithos Structure and geochemistry of Tethyan
ophiolites and their petrogenesis in subduction rollback systems, Lithos,
113, 1–20, https://doi.org/10.1016/j.lithos.2009.04.022, 2009.
Dilek, Y., Furnes, H., and Shallo, M.: Suprasubduction zone ophiolite
formation along the periphery of Mesozoic Gondwana, Gondwana Res.,
11, 453–475, https://doi.org/10.1016/j.gr.2007.01.005, 2007.
Dilek, Y., Furnes, H., and Shallo, M.: Geochemistry of the Jurassic Mirdita
Ophiolite (Albania) and the MORB to SSZ evolution of a marginal basin
oceanic crust, Lithos, 100, 174–209, https://doi.org/10.1016/j.lithos.2007.06.026,
2008.
Dunlop, D. and Özdemir, Ö.: Rock Magnetism: Fundamentals and
Frontiers, Cambridge University Press, Cambridge, 1997.
Duretz, T., Agard, P., Yamato, P., Ducassou, C., Burov, E. B., and Gerya, T.
V: Thermo-mechanical modeling of the obduction process based on the Oman
Ophiolite case, Gondwana Res., 32, 1–10, https://doi.org/10.1016/j.gr.2015.02.002,
2016.
Einaudi, F., Godard, M., Pezard, P., Cochemé, J. J., Coulon, C., Brewer,
T., and Harvey, P.: Magmatic cycles and formation of the upper oceanic crust
at spreading centers: Geochemical study of a continuous extrusive section in
the Oman ophiolite, Geochem. Geophy. Geosy., 4, 1–25,
https://doi.org/10.1029/2002GC000362, 2003.
Ernewein, M., Pflumio, C., and Whitechurch, H.: The death of an accretion
zone as evidenced by the magmatic history of the Sumail ophiolite (Oman),
Tectonophysics, 151, 247–274, https://doi.org/10.1016/0040-1951(88)90248-X, 1988.
Falloon, T. J. and Crawford, A. J.: The petrogenesis of high-calcium
boninite lavas dredged from the northern Tonga ridge, Earth Planet.
Sc. Lett., 102, 375–394, https://doi.org/10.1016/0012-821X(91)90030-L,
1991.
Falloon, T. J., Danyushevsky, L. V, Crawford, T. J., Maas, R., Woodhead, J.
D., Eggins, S. M., Bloomer, S. H., Wright, D. J., Zlobin, S. K., and Stacey,
A. R.: Multiple mantle plume components involved in the petrogenesis of
subduction-related lavas from the northern termination of the Tonga Arc and
northern Lau Basin: Evidence from the geochemistry of arc and backarc
submarine volcanics, Geochem. Geophy. Geosy., 8, Q09003,
https://doi.org/10.1029/2007GC001619, 2007.
Falloon, T. J., Danyushevsky, L. V, Crawford, A. J., Meffre, S., Woodhead,
J. D., and Bloomer, S. H.: Boninites and Adakites from the Northern
Termination of the Tonga Trench: Implications for Adakite Petrogenesis,
J. Petrol., 49, 697–715, https://doi.org/10.1093/petrology/egm080, 2008.
Feinberg, H., Horen, H., Michard, A., and Saddiqi, O.: Obduction-related
remagnetization at the base of an ophiolite: Paleomagnetism of the Samail
nappe lower sequence and of its continental substratum, southeast Oman
Mountains, J. Geophys. Res., 104, 17703,
https://doi.org/10.1029/1999JB900171, 1999.
Fleet, A. J. and Robertson, A. H. F.: Ocean-ridge metalliferous and pelagic
sediments of the Semail Nappe, Oman, J. Geol. Soc.,
137, 403–422, https://doi.org/10.1144/gsjgs.137.4.0403, 1980.
Flint, R. B., Webster, S. S., and Uppill, R. K.: Re-interpretation of the
1992 airborne magnetic survey of the Batinah coast and Yanqul area, Northern
Oman mountains, Muscat, 1999.
Gale, A., Dalton, C. A., Langmuir, C. H., Su, Y., and Schilling, J.-G.: The
mean composition of ocean ridge basalts, Geochem. Geophy.
Geosy., 14, 489–518, https://doi.org/10.1029/2012GC004334, 2013.
Gilgen, S. A., Diamond, L. W., Mercolli, I., Al-Tobi, K., Maidment, D. W.,
Close, R., and Al-Towaya, A.: Volcanostratigraphic Controls on the Occurrence
of Massive Sulfide Deposits in the Semail Ophiolite, Oman, Econ. Geol.,
109, 1585–1610, https://doi.org/10.2113/econgeo.109.6.1585, 2014.
Gilgen, S. A., Diamond, L. W., and Mercolli, I.: Sub-seafloor epidosite
alteration: Timing, depth and stratigraphic distribution in the Semail
ophiolite, Oman, Lithos, 260, 191–210, https://doi.org/10.1016/j.lithos.2016.05.014,
2016.
Godard, M., Dautria, J.-M., and Perrin, M.: Geochemical variability of the
Oman ophiolite lavas: Relationship with spatial distribution and
paleomagnetic directions, Geochem. Geophy. Geosy., 4, 1–25,
https://doi.org/10.1029/2002GC000452, 2003.
Godard, M., Bosch, D., and Einaudi, F.: A MORB source for low-Ti magmatism in
the Semail ophiolite, Chem. Geol., 234, 58–78,
https://doi.org/10.1016/j.chemgeo.2006.04.005, 2006.
Goodenough, K. M., Styles, M. T., Schofield, D., Thomas, R. J., Crowley, Q.
C., Lilly, R. M., McKervey, J., Stephenson, D., and Carney, J. N.:
Architecture of the Oman–UAE ophiolite: evidence for a multi-phase magmatic
history, Arab. J. Geosci., 3, 439–458,
https://doi.org/10.1007/s12517-010-0177-3, 2010.
Goodenough, K. M., Thomas, R. J., Styles, M. T., Schofield, D. I., and
MacLeod, C. J.: Records of ocean growth and destruction in the Oman-UAE
ophiolite, Elements, 10, 109–114, https://doi.org/10.2113/gselements.10.2.109, 2014.
Guilmette, C., Smit, M. A., van Hinsbergen, D. J. J., Gürer, D., Corfu,
F., Charette, B., Maffione, M., Rabeau, O., and Savard, D.: Forced subduction
initiation recorded in the sole and crust of the Semail Ophiolite of Oman,
Nat. Geosci., 11, 688–695, https://doi.org/10.1038/s41561-018-0209-2, 2018.
Haase, K. M., Freund, S., Beier, C., Koepke, J., Erdmann, M., and Hauff, F.:
Constraints on the magmatic evolution of the oceanic crust from
plagiogranite intrusions in the Oman ophiolite, Contrib. Miner.
Petrol., 171, 1–16, https://doi.org/10.1007/s00410-016-1261-9, 2016.
Haymon, R. M., Koski, R. A., and Abrams, M. J.: Hydrothermal discharge zones
beneath massive sulfide deposits mapped in the Oman ophiolite, Geology,
17, 531–535, https://doi.org/10.1130/0091-7613(1989)017<0531:HDZBMS>2.3.CO;2, 1989.
Hickey-Vargas, R., Yogodzinski, G. M., Ishizuka, O., McCarthy, A., Bizimis,
M., Kusano, Y., Savov, I. P., and Arculus, R.: Origin of depleted basalts
during subduction initiation and early development of the Izu-Bonin-Mariana
island arc: Evidence from IODP expedition 351 site U1438, Amami-Sankaku
basin, Geochim. Cosmochim. Acta, 229, 85–111,
https://doi.org/10.1016/j.gca.2018.03.007, 2018.
Ishikawa, T., Nagaishi, K., and Umino, S.: Boninitic volcanism in the Oman
ophiolite: Implications for thermal condition during transition from
spreading ridge to arc, Geology, 30, 899–902,
https://doi.org/10.1130/0091-7613(2002)030<0899:BVITOO>2.0.CO;2,
2002.
Ishizuka, O., Tani, K., Reagan, M. K., Kanayama, K., Umino, S., Harigane,
Y., Sakamoto, I., Miyajima, Y., Yuasa, M., and Dunkley, D. J.: The timescales
of subduction initiation and subsequent evolution of an oceanic island arc,
Earth Planet. Sc. Lett., 306, 229–240,
https://doi.org/10.1016/j.epsl.2011.04.006, 2011.
Isles, D. J. and Witham, W. J. A.: Batinah Coast region and Raki Hayl As
Safil area, Airborne Geophysical Project: Final report on geological
interpretation, Ministry of Petroleum and Minerals, Sultanate of Oman, Muscat, 1993.
Jenner, F. E. and O'Neill, H. S. C.: Analysis of 60 elements in 616 ocean
floor basaltic glasses, Geochem. Geophy. Geosy., 13, Q02005,
https://doi.org/10.1029/2011GC004009, 2012.
JICA: Report on the cooperative mineral exploration in the South Batinah
Coast area, Sultanate of Oman: consolidated report, available at:
http://open_jicareport.jica.go.jp/pdf/11597283_02.pdf (last access: 31 July 2018), 2000.
JICA: Report on the mineral exploration in the Yanqul-Ghuzayn area Sultanate
of Oman: Final report, available at: http://open_jicareport.jica.go.jp/pdf/11678257_01.pdf (last access: 31 July 2018), 2002.
Jochum, K. P., Nohl, U., Herwig, K., Lammel, E., Stoll, B., and Hofmann, A.
W.: GeoReM: A New Geochemical Database for Reference Materials and Isotopic
Standards, Geostand. Geoanal. Res., 29, 333–338,
https://doi.org/10.1111/j.1751-908X.2005.tb00904.x, 2005.
Juteau, T., Ernewein, M., Reuber, I., Whitechurch, H., and Dahl, R.: Duality
of magmatism in the plutonic sequence of the Sumail Nappe, Oman,
Tectonophysics, 151, 107–135, https://doi.org/10.1016/0040-1951(88)90243-0, 1988.
Kane, J. S., Potts, P. J., Meisel, T., and Wiedenbeck, M.: International association of geoanalysts' protocol for the certification of geological and environmental reference materials: A supplement, Geostand. Geoanal. Res., 31, 285–288, https://doi.org/10.1111/j.1751-908X.2007.00869.x, 2007.
Kanke, N. and Takazawa, E.: A kilometre-scale highly refractory harzburgite
zone in the mantle section of the northern Oman Ophiolite (Fizh Block):
implications for flux melting of oceanic lithospheric mantle, Geol.
Soc. London Spec. Pub., 392, 229–246, https://doi.org/10.1144/SP392.12,
2014.
Kontny, A. and Grothaus, L.: Effects of shock pressure and temperature on
titanomagnetite from ICDP cores and target rocks of the El'gygytgyn impact
structure, Russia, Stud. Geophys. Geod., 61, 162–183,
https://doi.org/10.1007/s11200-016-0819-3, 2017.
Kusano, Y., Adachi, Y., Miyashita, S., and Umino, S.: Lava accretion system
around mid-ocean ridges: Volcanic stratigraphy in the Wadi Fizh area,
northern Oman ophiolite, Geochem. Geophy. Geosy., 13, Q05012,
https://doi.org/10.1029/2011GC004006, 2012.
Kusano, Y., Hayashi, M., Adachi, Y., Umino, S., and Miyashita, S.: Evolution
of volcanism and magmatism during initial arc stage: constraints on the
tectonic setting of the Oman Ophiolite, Geol. Soc. London Spec.
Pub., 392, 177–193, https://doi.org/10.1144/SP392.9, 2014.
Kusano, Y., Umino, S., Shinjo, R., Ikei, A., Adachi, Y., Miyashita, S., and
Arai, S.: Contribution of slab-derived fluid and sedimentary melt in the
incipient arc magmas with development of the paleo-arc in the Oman
Ophiolite, Chem. Geol., 449, 206–225,
https://doi.org/10.1016/j.chemgeo.2016.12.012, 2017.
Li, H.-Y., Taylor, R. N., Prytulak, J., Kirchenbaur, M., Shervais, J. W.,
Ryan, J. G., Godard, M., Reagan, M. K., and Pearce, J. A.: Radiogenic
isotopes document the start of subduction in the Western Pacific, Earth
Planet. Sc. Lett., 518, 197–210, https://doi.org/10.1016/j.epsl.2019.04.041,
2019.
Lippard, S. J., Shelton, A. W., and Gass, I. G.: The Ophiolite of Northern
Oman, Blackwell Scientific Publications Ltd, London, Great Britain, 1986.
Liu, Q., Banerjee, S. K., Jackson, M. J., Deng, C., Pan, Y., and Rixiang, Z.:
New insights into partial oxidation model of magnetites and thermal
alteration of magnetic mineralogy of the Chinese loess in air, Geophys.
J. Int., 158, 506–514,
https://doi.org/10.1111/j.1365-246X.2004.02348.x, 2004.
MacLeod, C. J. and Rothery, D. A.: Ridge axial segmentation in the Oman
ophiolite: Evidence from along-strike variations in the sheeted dyke
complex, Geol. Soc. London Spec. Pub., 60, 39–63,
https://doi.org/10.1144/GSL.SP.1992.060.01.03, 1992.
MacLeod, C. J., Johan Lissenberg, C. and Bibby, L. E.: “Moist MORB” axial
magmatism in the Oman ophiolite: The evidence against a mid-ocean ridge
origin, Geology, 41, 459–462, https://doi.org/10.1130/G33904.1, 2013.
Mallmann, G. and O'Neill, H. S. C.: The crystal/melt partitioning of V
during mantle melting as a function of oxygen fugacity compared with some
other elements (Al, P, Ca, Sc, Ti, Cr, Fe, Ga, Y, Zr and Nb), J.
Petrol., 50, 1765–1794, https://doi.org/10.1093/petrology/egp053, 2009.
Matveev, S. and Ballhaus, C.: Role of water in the origin of podiform
chromitite deposits, Earth Planet Sc. Lett., 203, 235–243,
https://doi.org/10.1016/S0012-821X(02)00860-9, 2002.
Meffre, S., Falloon, T. J., Crawford, T. J., Hoernle, K., Hauff, F., Duncan,
R. A., Bloomer, S. H., and Wright, D. J.: Basalts erupted along the Tongan
fore arc during subduction initiation: Evidence from geochronology of
dredged rocks from the Tonga fore arc and trench, Geochem. Geophy.
Geosy., 13, https://doi.org/10.1029/2012GC004335, 2012.
Metcalf, R. V. and Shervais, J. W.: Suprasubduction-zone ophiolites: Is
there really an ophiolite conundrum?, in: Special Paper 438: Ophiolites,
Arcs, and Batholiths: A Tribute to Cliff Hopson, 191–222, 2008.
Miyashita, S., Adachi, Y., and Umino, S.: Along-axis magmatic system in the
northern Oman ophiolite: Implications of compositional variation of the
sheeted dike complex, Geochem. Geophy. Geosy., 4, 8617,
https://doi.org/10.1029/2001GC000235, 2003.
Moghadam, H. S., Stern, R. J., and Rahgoshay, M.: The Dehshir ophiolite
(central Iran): Geochemical constraints on the origin and evolution of the
inner Zagros ophiolite belt, Bull. Geol. Soc. Am.,
122, 1516–1547, https://doi.org/10.1130/B30066.1, 2010.
Morgan, G. B. and London, D.: Effect of current density on the electron
microprobe analysis of alkali aluminosilicate glasses, Am.
Mineral., 70, 1131–1138, https://doi.org/10.2138/am.2005.1769, 2005.
Morris, A., Meyer, M., Anderson, M. W., and MacLeod, C. J.: Clockwise
rotation of the entire Oman ophiolite occurred in a suprasubduction zone
setting, Geology, 44, 1055–1058, https://doi.org/10.1130/G38380.1, 2016.
Moskowitz, B. M., Jackson, M., and Kissel, C.: Low-temperature magnetic
behavior of titanomagnetites, Earth Planet. Sc. Lett.,
157, 141–149, https://doi.org/10.1016/S0012-821X(98)00033-8, 1998.
Murton, B. J., Peete, D. W., Arculus, R. J., Pearce, J. A., and Van der Laan,
S. R.: Trace-Element Geochemistry of Volcanic Rocks from Site 786: The
Izu-Bonin Forearc, Proceedings of the Ocean Drilling Program, Sci.
Res., 125, 211–235, https://doi.org/10.2973/odp.proc.sr.125.133.1992, 1992.
Nicolas, A., Boudier, F., Ildefonse, B., and Ball, E.: Accretion of Oman and
United Arab Emirates ophiolite – Discussion of a new structural map, Mar.
Geophys. Res., 21, 147–180, https://doi.org/10.1023/A:1026769727917, 2000.
Osozawa, S., Shinjo, R., Lo, C.-H., Jahn, B.-M., Hoang, N., Sasaki, M.,
Ishikawa, K., Kano, H., Hoshi, H., Xenophontos, C., and Wakabayashi, J.:
Geochemistry and geochronology of the Troodos ophiolite: An SSZ ophiolite
generated by subduction initiation and an extended episode of ridge
subduction?, Lithosphere, 4, 497–510, https://doi.org/10.1130/L205.1, 2012.
Patriat, M., Falloon, T., Danyushevsky, L., Collot, J., Jean, M. M.,
Hoernle, K., Hauff, F., Maas, R., Woodhead, J. D., and Feig, S. T.:
Subduction initiation terranes exposed at the front of a 2 Ma
volcanically-active subduction zone, Earth Planet. Sc. Lett.,
508, 30–40, https://doi.org/10.1016/j.epsl.2018.12.011, 2019.
Pearce, J. A.: Geochemical evidence for the genesis and eruptive setting of
lavas from Tethyan ophiolites, in: Proceedings of the International
Ophiolite Symposium 1979, Cyprus 1979, 261–272, Ministry of Agriculture and
Natural Resources, Cyprus, 1980.
Pearce, J. A.: Immobile Element Fingerprinting of Ophiolites, Elements,
10, 101–108, https://doi.org/10.2113/gselements.10.2.101, 2014.
Pearce, J. A. and Reagan, M. K.: Identification, classification, and
interpretation of boninites from Anthropocene to Eoarchean using Si-Mg-Ti
systematics, Geosphere, 15, 1–11, https://doi.org/10.1130/GES01661.1, 2019.
Pearce, J. A. and Robinson, P. T.: The Troodos ophiolitic complex probably
formed in a subduction initiation, slab edge setting, Gondwana Res.,
18, 60–81, https://doi.org/10.1016/j.gr.2009.12.003, 2010.
Pearce, J. A., Alabaster, T., Shelton, A. W., and Searle, M. P.: The Oman
Ophiolite as a Cretaceous Arc-Basin Complex: Evidence and Implications,
Philos. T. R. Soc. S.-A., 300, 299–317,
https://doi.org/10.1098/rsta.1981.0066, 1981.
Pearce, J. A., van der Laan, S. R., Arculus, R. J., Murton, B. J., Ishii,
T., Peate, D. W., and Parkinson, I. J.: Boninite and Harzburgite from Leg 125
(Bonin-Mariana Forearc): A Case Study of Magma Genesis during the Initial
Stages of Subduction, Proceedings of the Ocean Drilling Program,
Sci. Res., 125, 623–659, https://doi.org/10.2973/odp.proc.sr.125.172.1992, 1992.
Perrin, M., Prevot, M., and Bruere, F.: Rotation of the Oman ophiolite and
initial location of the ridge in the hotspot reference frame,
Tectonophysics, 229, 31–42, https://doi.org/10.1016/0040-1951(94)90004-3, 1994.
Perrin, M., Plenier, G., Dautria, J. M., Cocuaud, E., and Prévot, M.:
Rotation of the Semail ophiolite (Oman): Additional paleomagnetic data from
the volcanic sequence, Mar. Geophys. Res., 21, 181–194,
https://doi.org/10.1023/A:1026738313805, 2000.
Peters, D. and Pettke, T.: Evaluation of Major to Ultra Trace Element Bulk
Rock Chemical Analysis of Nanoparticulate Pressed Powder Pellets by
LA-ICP-MS, Geostand. Geoanal. Res., 41, 5–28,
https://doi.org/10.1111/ggr.12125, 2016.
Pflumio, C.: Evidences for Polyphased Oceanic Alteration of the Extrusive
Sequence of the Semail Ophiolite from the Salahi Block (Northern Oman),
Petr. Stru. G., 5, 313–351,
https://doi.org/10.1007/978-94-011-3358-6_17, 1991.
Python, M. and Ceuleneer, G.: Nature and distribution of dykes and related
melt migration structures in the mantle section of the Oman ophiolite,
Geochem. Geophy. Geosy., 4, 8612, https://doi.org/10.1029/2002GC000354, 2003.
Python, M., Ceuleneer, G., and Arai, S.: Chromian spinels in mafic-ultramafic
mantle dykes: Evidence for a two-stage melt production during the evolution
of the Oman ophiolite, Lithos, 106, 137–154,
https://doi.org/10.1016/j.lithos.2008.07.001, 2008.
Reagan, M. K., Ishizuka, O., Stern, R. J., Kelley, K. A., Ohara, Y.,
Blichert-Toft, J., Bloomer, S. H., Cash, J., Fryer, P., Hanan, B. B.,
Hickey-Vargas, R., Ishii, T., Kimura, J.-I., Peate, D. W., Rowe, M. C., and
Woods, M.: Fore-arc basalts and subduction initiation in the
Izu-Bonin-Mariana system, Geochem. Geophy. Geosy., 11, Q03X12,
https://doi.org/10.1029/2009GC002871, 2010.
Reagan, M. K., McClelland, W. C., Girard, G., Goff, K. R., Peate, D. W.,
Ohara, Y., and Stern, R. J.: The geology of the southern Mariana fore-arc
crust: Implications for the scale of Eocene volcanism in the western
Pacific, Earth Planet. Sc. Lett., 380, 41–51,
https://doi.org/10.1016/j.epsl.2013.08.013, 2013.
Reagan, M. K., Pearce, J. A., Petronotis, K., Almeev, R. R., Avery, A. J.,
Carvallo, C., Chapman, T., Christeson, G. L., Ferré, E. C., Godard, M.,
Heaton, D. E., Kirchenbaur, M., Kurz, W., Kutterolf, S., Li, H., Li, Y.,
Michibayashi, K., Morgan, S., Nelson, W. R., Prytulak, J., Python, M.,
Robertson, A. H. F., Ryan, J. G., Sager, W. W., Sakuyama, T., Shervais, J.
W., Shimizu, K., and Whattam, S. A.: Subduction initiation and ophiolite
crust: new insights from IODP drilling, Int. Geol. Rev., 59, 1439–1450,
https://doi.org/10.1080/00206814.2016.1276482, 2017.
Reagan, M. K., Heaton, D. E., Schmitz, M. D., Pearce, J. A., Shervais, J. W.,
and Koppers, A. A. P.: Forearc ages reveal extensive short-lived and rapid
seafloor spreading following subduction initiation, Earth Planet.
Sc. Lett., 506, 520–529, https://doi.org/10.1016/j.epsl.2018.11.020, 2019.
Reuber, I.: Complexity of the crustal sequence in the northern Oman
ophiolite (Fizh and southern Aswad blocks): The effect of early slicing?,
Tectonophysics, 151, 137–165, https://doi.org/10.1016/0040-1951(88)90244-2, 1988.
Reuber, I., Nehlig, P., and Juteau, T.: Axial segmentation at a fossil
oceanic spreading centre in the Haylayn block (Semail nappe, Oman): off-axis
mantle diapir and advancing ridge tip, J. Geodynam., 13,
253–278, https://doi.org/10.1016/0264-3707(91)90041-C, 1991.
Rioux, M., Bowring, S., Kelemen, P., Gordon, S., Miller, R., and Dudás,
F.: Tectonic development of the Samail ophiolite: High-precision U-Pb zircon
geochronology and Sm-Nd isotopic constraints on crustal growth and
emplacement, J. Geophys. Res.-Sol. Ea., 118,
2085–2101, https://doi.org/10.1002/jgrb.50139, 2013.
Rioux, M., Garber, J., Bauer, A., Bowring, S., Searle, M., Kelemen, P., and
Hacker, B.: Synchronous formation of the metamorphic sole and igneous crust
of the Semail ophiolite?: New constraints on the tectonic evolution during
ophiolite formation from high-precision U – Pb zircon geochronology, Earth
Planet. Sc. Lett., 451, 185–195,
https://doi.org/10.1016/j.epsl.2016.06.051, 2016.
Robertson, A. H. F. and Woodcock, N. H.: Genesis of the Batinah mélange
above the Semail ophiolite, Oman, J. Struct. Geol., 5,
1–17, https://doi.org/10.1016/0191-8141(83)90003-2, 1983a.
Robertson, A. H. F. and Woodcock, N. H.: Zabyat Formation, Semail Nappe,
Oman: sedimentation on to an emplacing ophiolite, Sedimentology, 30,
105–116, https://doi.org/10.1111/j.1365-3091.1983.tb00653.x, 1983b.
Rochette, P., Fillion, G., Mattéi, J. L., and Dekkers, M. J.: Magnetic
transition at 30-34 Kelvin in pyrrhotite: insight into a widespread
occurrence of this mineral in rocks, Earth Planet. Sc. Lett.,
98, 319–328, https://doi.org/10.1016/0012-821X(90)90034-U, 1990.
Rollinson, H.: The geochemistry of mantle chromitites from the northern part
of the Oman ophiolite: Inferred parental melt compositions, Contrib.
Miner. Petrol., 156, 273–288, https://doi.org/10.1007/s00410-008-0284-2,
2008.
Rollinson, H.: New models for the genesis of plagiogranites in the Oman
ophiolite, Lithos, 112, 603–614, https://doi.org/10.1016/j.lithos.2009.06.006,
2009.
Rollinson, H. and Adetunji, J.: The geochemistry and oxidation state of
podiform chromitites from the mantle section of the Oman ophiolite: A
review, Gondwana Res., 27, 543–554, https://doi.org/10.1016/j.gr.2013.07.013,
2015.
Searle, M. P., Lippard, S. J., Smewing, J. D., and Rex, D. C.: Volcanic rocks
beneath the Semail Ophiolite nappe in the northern Oman mountains and their
significance in the Mesozoic evolution of Tethys, J. Geol.
Soc., 137, 589–604, https://doi.org/10.1144/gsjgs.137.5.0589, 1980.
Shafaii Moghadam, H., Corfu, F., and Stern, R. J.: U–Pb zircon ages of Late
Cretaceous Nain–Dehshir ophiolites, central Iran, J. Geol.
Soc., 170, 175–184, https://doi.org/10.1144/jgs2012-066, 2013.
Shelton, A. W.: The interpretation of gravity data in Oman: constraints on
the ophiolite emplacement mechanism, Geol. Soc. London Spec.
Pub., 49, 459–471, https://doi.org/10.1144/GSL.SP.1992.049.01.29, 1990.
Shervais, J. W.: TiV plots and the petrogenesis of modern and ophiolitic
lavas, Earth Planet. Sc. Lett., 59, 101–118,
https://doi.org/10.1016/0012-821X(82)90120-0, 1982.
Shervais, J. W., Reagan, M., Haugen, E., Almeev, R., Pearce, J., Prytulak,
J., Ryan, J. G., Whattam, S., Godard, M., Chapman, T., Li, H., Kurz, W.,
Nelson, W. R., Heaton, D., Kirchenbaur, M., Shimizu, K., Sakuyama, T., Li,
Y., and Vetter, S. K.: Magmatic Response to Subduction Initiation, Part I:
Forearc basalts of the Izu-Bonin Arc from IODP Expedition 352, Geochem.
Geophy. Geosy., 20, 314–338, https://doi.org/10.1029/2018GC007731, 2019.
Smewing, J. D.: An Upper Cretaceous ridge-transform intersection in the Oman
ophiolite, in: Proceedings of the International Ophiolite Symposium 1979, Cyprus,
1979, edited by: Panayiotou A., 407–413, Cyprus Geological Survey
Department, Nicosia, 1980.
Smewing, J. D., Simonian, K. O., Elboushi, I. M., and Gass, I. G.:
Mineralized fault zone parallel to the Oman ophiolite spreading axis,
Geology, 5, 534–538, https://doi.org/10.1130/0091-7613(1977)5<534:MFZPTT>2.0.CO;2, 1977.
Stern, R. J. and Bloomer, S. H.: Subduction zone infancy: examples from the
Eocene Izu-Bonin-Mariana and Jurassic California arcs, Geol. Soc.
Am. Bull., 104, 1621–1636,
https://doi.org/10.1130/0016-7606(1992)104<1621:SZIEFT>2.3.CO;2,
1992.
Stern, R. J. and Gerya, T.: Subduction initiation in nature and models: A
review, Tectonophysics, 746, 173–198, https://doi.org/10.1016/j.tecto.2017.10.014,
2017.
Stern, R. J., Reagan, M., Ishizuka, O., Ohara, Y., and Whattam, S.: To
understand subduction initiation, study forearc crust: To understand forearc
crust, study ophiolites, Lithosphere, 4, 469–483, https://doi.org/10.1130/L183.1,
2012.
Styles, M., Ellison, R., Arkley, S., Crowley, Q. G., Farrant, A., and
Goodenough, K. M.: The geology and geophysics of the United Arab Emirates?:
Volume 2, Geology, Abu Dhabi, 2006.
Takazawa, E., Okayasu, T., and Satoh, K.: Geochemistry and origin of the
basal lherzolites from the northern Oman ophiolite (northern Fizh block),
Geochem. Geophy. Geosy., 4, 1021, https://doi.org/10.1029/2001GC000232, 2003.
Thébault, E., Finlay, C. C., Beggan, C. D., Alken, P., Aubert, J.,
Barrois, O., Bertrand, F., Bondar, T., Boness, A., Brocco, L., Canet, E.,
Chambodut, A., Chulliat, A., Coïsson, P., Civet, F., Du, A., Fournier,
A., Fratter, I., Gillet, N., Hamilton, B., Hamoudi, M., Hulot, G., Jager,
T., Korte, M., Kuang, W., Lalanne, X., Langlais, B., Léger, J.-M.,
Lesur, V., Lowes, F. J., Macmillan, S., Mandea, M., Manoj, C., Maus, S.,
Olsen, N., Petrov, V., Ridley, V., Rother, M., Sabaka, T. J., Saturnino, D.,
Schachtschneider, R., Sirol, O., Tangborn, A., Thomson, A.,
Tøffner-Clausen, L., Vigneron, P., Wardinski, I., and Zvereva, T.:
International Geomagnetic Reference Field: the 12th generation, Earth
Planet. Space, 67, 79–90, https://doi.org/10.1186/s40623-015-0228-9, 2015.
Tsuchiya, N., Shibata, T., Yoshikawa, M., Adachi, Y., Miyashita, S., Adachi,
T., Nakano, N., and Osanai, Y.: Petrology of Lasail plutonic complex,
northern Oman ophiolite, Oman: An example of arc-like magmatism associated
with ophiolite detachment, Lithos, 156–159, 120–138,
https://doi.org/10.1016/j.lithos.2012.10.013, 2013.
Umino, S.: Emplacement mechanism of off-axis large submarine lava field from
the Oman Ophiolite, J. Geophys. Res.-Sol. Ea.,
117, B11210, https://doi.org/10.1029/2012JB009198, 2012.
Umino, S., Yanai, S., Jaman, A. R., Nakamura, Y., and Iiyama, J. T.: The
transition from spreading to subduction: Evidence from the Semail Ophiolite,
northern Oman Mountains, in: Oceanic Crustal Analogues: Proceedings of the
Symposium “Troodos 1987”, 375–384, Cyprus Geological Survey
Department, Nicosia, 1990.
Umino, S., Miyashita, S., Hotta, F., and Adachi, Y.: Along-strike variation
of the sheeted dike complex in the Oman Ophiolite: Insights into subaxial
ridge segment structures and the magma plumbing system, Geochem.
Geophy. Geosy., 4, 8618, https://doi.org/10.1029/2001GC000233, 2003.
Usui, Y. and Yamazaki, S.: Salvaging primary remanence from hydrothermally
altered oceanic gabbros in the Oman ophiolite: A selective destructive
demagnetization approach, Phys. Earth Planet. In.,
181, 1–11, https://doi.org/10.1016/j.pepi.2010.04.008, 2010.
Velzen, A. J. and Zijderveld, J. D. A.: A method to study alterations of
magnetic minerals during thermal demagnetization applied to a fine-grained
marine marl (Trubi formation, Sicily), Geophys. J. Int.,
110, 79–90, https://doi.org/10.1111/j.1365-246X.1992.tb00715.x, 1992.
Vogt, P. R. and Johnson, G. L.: Magnetic telechemistry of oceanic crust?,
Nature, 245, 373–375, https://doi.org/10.1038/245373a0, 1973.
Whattam, S. A. and Stern, R. J.: The “subduction initiation rule”: A key
for linking ophiolites, intra-oceanic forearcs, and subduction initiation,
Contrib. Miner. Petrol., 162, 1031–1045,
https://doi.org/10.1007/s00410-011-0638-z, 2011.
Woodcock, N. H. and Robertson, A. H. F.: The upper Batinah Complex, Oman:
allochthonous sediment sheets above the Semail ophiolite, Can. J.
Earth Sci., 19, 1635–1656, https://doi.org/10.1139/e82-140, 1982.
Yamasaki, T., Maeda, J., and Mizuta, T.: Geochemical evidence in
clinopyroxenes from gabbroic sequence for two distinct magmatisms in the
Oman ophiolite, Earth Planet. Sc. Lett., 251, 52–65,
https://doi.org/10.1016/j.epsl.2006.08.027, 2006.
Yogodzinski, G. M., Bizimis, M., Hickey-Vargas, R., McCarthy, A., Hocking,
B. D., Savov, I. P., Ishizuka, O., and Arculus, R.: Implications of
Eocene-age Philippine Sea and forearc basalts for initiation and early
history of the Izu-Bonin-Mariana arc, Geochim. Cosmochim. Acta, 228,
136–156, https://doi.org/10.1016/j.gca.2018.02.047, 2018.
Short summary
We present an updated geological map of the volcanic rocks present in the north-east Oman mountains. These volcanic rocks erupted at the seafloor, probably above a young subduction zone, and have since been tectonically transported into their accessible position. The updated map allows us to examine the spatial relationships between the different volcanic and geological features, including copper, gold, and chrome deposits. The new map will aid further study in Oman and other similar settings.
We present an updated geological map of the volcanic rocks present in the north-east Oman...