Zobrazeno 1 - 10
of 119
pro vyhledávání: '"Calvin G Barnes"'
Autor:
Calvin G Barnes, Kevin Werts
Publikováno v:
Journal of Petrology. 63
The concept of defrosting, heating and partially melting a crystal-rich, weakly mobile or immobile magma (magmatic mush) has gained wide support from volcanological studies. This process has been called on as a means to promote eruption of crystal-ri
Autor:
Changhai Xu, Yuling Deng, Calvin G. Barnes, Hesheng Shi, Christophe Pascal, Yuanyuan Li, Shunli Gao, Donghui Jiang, Jianlei Xie, Changqian Ma
Publikováno v:
Earth-Science Reviews. 240:104382
Publikováno v:
Geosphere. 17:352-374
The widespread occurrence of mafic magmatic enclaves (mme) in arc volcanic rocks attests to hybridization of mafic-intermediate magmas with felsic ones. Typically, mme and their hosts differ in mineral assemblage and the compositions of phenocrysts a
Autor:
Calvin G. Barnes, Melanie A. Barnes
Publikováno v:
Geosphere. 16:1058-1081
Arc magmatism was widespread in the Cordillera of North America during Middle Jurassic time. The predominant representative of this arc magmatism in the Klamath Mountain province is the western Hayfork terrane (WHT). This terrane is primarily metased
Autor:
Barbara C. Ratschbacher, Valbone Memeti, Kevin Werts, Scott R. Paterson, Dustin R. Williams, Calvin G. Barnes
Publikováno v:
American Mineralogist. 105:77-91
Bulk-rock compositions are commonly used as proxies for melt compositions, particularly in silicic plutonic systems. However, crystal accumulation and/or melt loss may play an important role in bulk-rock compositional variability (McCarthy and Hasty
Autor:
Calvin G Barnes, Nolwenn Coint, Melanie A Barnes, Kevin R Chamberlain, John M Cottle, O Tapani Rämö, Ariel Strickland, John W Valley
Publikováno v:
Journal of Petrology. 62
This study addresses the question of how and where arc magmas obtain their chemical and isotopic characteristics. The Wooley Creek batholith and Slinkard pluton are a tilted, mid- to upper-crustal part of a vertically extensive, late-Jurassic, arc-re
Publikováno v:
Journal of Petrology. 60:2227-2240
Cumulate processes in granitic magma systems are thought by some to be negligible and by others to be common and widespread. Because most granitic rocks lack obvious evidence of accumulation, such as modal layering, other means of identifying cumulat
Autor:
Keith A. Klepeis, Calvin G. Barnes, Andy J. Tulloch, Kendra Carty, Joshua J. Schwartz, John A. Wiesenfeld, Harold H. Stowell
Publikováno v:
Journal of Petrology. 62
We present microbeam major- and trace-element data from 14 monzodiorites collected from the Malaspina Pluton (Fiordland, New Zealand) with the goal of evaluating processes involved in the production of andesites in lower arc crust. We focus on relict
Autor:
Gillian Greenberg, Kendra Carty, Keith A. Klepeis, Calvin G. Barnes, Joshua J. Schwartz, Adam J. Brackman, Harold H. Stowell
Publikováno v:
Geological Society of America Abstracts with Programs.
Autor:
Vali Memeti, Louis F. Oppenheim, Calvin G. Barnes, Melissa Chambers, Katie E. Ardill, Kevin Werts
Publikováno v:
Geological Society of America Abstracts with Programs.