 | | Journal (article/letter/editorial) | | Geophysics, UniÕersity of Wyoming, Laramie, WY 82071, USA Department of Earth Sciences, Wills Memorial Building...Absalbite, Cc s calcite, Ctes chlorite, Fe-tsk s Fe-tschermakite ŽCa 2 Fe 4 AlSi 7 AlO 22 ŽOH. 2 ., Lw s lawsonite...at 1.43 Ga in the contact aureole of the Red Mountain pluton. Outside the contact aureole, the amphibolite...and the fields are overlapping, hiding any within-pluton variation caused by differentiation. The few studies...crystallized above its closure temperature, if the pluton was slowly cooled, the sphene age may be a closure |  | | Book | | Avenue of the Americas, New York, NY 10013-2473, USA Cambridge University Press is part of the University...(A) Geologic sketch map of Shiprock in New Mexico, USA, showing dikes (linear features) radiating out of...Cretaceous sedimentary rocks, southern Colorado, USA 15 (A) Biotite-rich xenolith in granodiorite dike...cutting the Laramie anorthosite complex, Wyoming, USA. (B) Fine-grained granodiorite autolith in granite...magma chamber floor. Laramie anorthosite complex, USA 3.9 (A) Photo of alkali feldspar mantled with plagioclase |  | | Journal (article/letter/editorial) | | the host metabasite is magnesiohornblende to tschermakite in composition (Leake et al., Table 3 Representative...; XMg = 0.64–0.69), halogen-poor hornblende (tschermakite to Mg-hornblende in composition; Leake et al...growth in the 117 contact aureole of the Red Mountain Pluton, Laramie Mountains, Wyoming. Contrib. Mineral |  | | Journal (article/letter/editorial) | | idiomorphic when opaque, granular when translucent red or brown, and interstitial when green, analogous...0rSi0 2 -H 2 0, because of the 412 EVANS tschermakite (and, in nature, pargasite) substitutions into...1976a ; Misch & Rice 1975), substitutions of the tschermakite and pargasite end members. Orthopyroxenes in...and pyroxenite, the spinels range from translucent red high Cr to translucent green, high-AI types, and...and the pyroxenes from low to high-AI (tschermakite substitution). A pargasitic magnesiohornblende is part |  | | Report (issue) | | George Washington University Washington, D.C. 20052 USA Louise Corriveau Geological Survey of Canada GSC-Québec...Skidmore College Saratoga Springs, New York 12866 USA Mervin J. Bartholomew Department of Earth Sciences...Tennessee 38152 USA Memoir 197 3300 Penrose Place, P.O. Box 9140 ■Boulder, Colorado 80301-9140, USA 2004 MWR197...Place, P.O. Box 9140, Boulder, Colorado 80301-9140, USA. Copyright is not claimed on any material prepared...Place, P.O. Box 9140, Boulder, Colorado 80301-9140, USA www.geosociety.org Printed in U.S.A. GSA Books Science |  | | Book | | high aluminum end with the quaternary species tschermakite (Ca2Mg3AI4Si6022(OH)2) when, according to stoichiometric...of the amphibolite facies consisting of pure tschermakite, which coincides with the AI-rich termination...according to the reaction Ca2Mg3AI4Si6022(OHh ~ tschermakite enstatite 4.9 Jorsterite anorthite Relationship...CaO MgO 59 4 From Figure 4.5 we see that tschermakite lies in the triangle enstatite-forsterite-anorthite...temperatures favor a weak crust and attentuated mountain roots. For mass transport, the high temperatures |
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