Articles | Volume 9, issue 1
Research article
27 Feb 2018
Research article |  | 27 Feb 2018

Structural disorder of graphite and implications for graphite thermometry

Martina Kirilova, Virginia Toy, Jeremy S. Rooney, Carolina Giorgetti, Keith C. Gordon, Cristiano Collettini, and Toru Takeshita

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Cited articles

Barzoi, S. C.: Shear stress in the graphitization of carbonaceous matter during the low-grade metamorphism from the northern Parang Mountains (South Carpathians) – Implications to graphite geothermometry, Int. J. Coal Geol., 146, 179–187, 2015.
Beeler, N. M.: Laboratory-observed faulting in intrinsically and apparently weak materials: Strength, seismic coupling, dilatancy, and pore-fluid pressure, The Seismogenic Zone of Subduction Thrust Faults, 370–449, 2007.
Beyssac, O., Goffé, B., Chopin, C., and Rouzaud, J. N.: Raman spectra of carbonaceous material in metasediments: a new geothermometer, J. Metamorph. Geol., 20, 859–871, 2002a.
Beyssac, O., Rouzaud, J. N., Goffé, B., Brunet, F., and Chopin, C.: Graphitization in a high-pressure, low-temperature metamorphic gradient: a Raman microspectroscopy and HRTEM study, Contrib. Mineral. Petr., 143, 19–31, 2002b.
Beyssac, O., Brunet, F., Petitet, J. P., Goffé, B., and Rouzand, J. N.: Experimental study of the microtextural and structural transformations of carbonaceous materials under pressure and temperature, Eur. J. Mineral., 15, 937–951, 2003.
Short summary
Graphite crystallinity “irreversibly” increases with temperature and it has been calibrated as a thermometer recording peak temperatures experienced by a rock. To examine the possibility of mechanical modifications of graphite structure and the impacts on graphite thermometry we performed deformation experiments. Raman spectroscopy demonstrates a reduction in crystallinity due to mechanical reworking in the brittle field. This finding clearly compromises the validity of the graphite thermometry.