TY  - JOUR
A1  - Schertl, Hans-Peter
A1  - O'Brien, Patrick
T1  - Continental crust at mantle depths - key minerals and microstructures
JF  - Elements : an international magazine of mineralogy, geochemistry, and petrology
N2  - Finding evidence for ultrahigh-pressure (UHP) metamorphism in crustal rocks is far from straightforward. The index minerals coesite and diamond are incredibly inconspicuous and are therefore difficult to use as UHP prospecting tools. Consequently, petrographers rely on recognizing subtle breakdown microstructures that result from pressure release during the return to the surface of the once deeply buried rock. Similarly, many other UHP minerals are first suspected on the basis of typical reaction or exsolution microstructures. Thus, the painstaking use of microscopic techniques has been fundamental to the tremendous advances in characterizing, quantifying, and understanding macroscopic-scale, deep continental subduction, rapid exhumation, and mountain-building processes.
KW  - ultrahigh-pressure
KW  - coesite
KW  - microdiamond
KW  - majorite
KW  - exsolution microstructures
KW  - polymorphism
Y1  - 2013
U6  - https://doi.org/10.2113/gselements.9.4.261
SN  - 1811-5209
SN  - 1811-5217
VL  - 9
IS  - 4
SP  - 261
EP  - 266
PB  - Mineralogical Society of America
CY  - Chantilly
ER  -