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Author : J. Lawford Anderson
Publisher : Geological Society of America
Page : 428 pages
File Size : 49,9 Mb
Release : 1990
Category : Science
ISBN : 9780813711744
Author : J. Lawford Anderson
Publisher : Unknown
Page : 414 pages
File Size : 47,8 Mb
Release : 2018
Category : Geology, Stratigraphic
ISBN : OCLC:1086477325
Author : Robert S. Hildebrand,Joseph B. Whalen
Publisher : Geological Society of America
Page : 113 pages
File Size : 45,6 Mb
Release : 2017-10-03
Category : Batholiths
ISBN : 9780813725321
In this Special Paper, Hildebrand and Whalen present a big-picture, paradigm-busting synthesis that examines the tectonic setting, temporal relations, and geochemistry of many plutons within Cretaceous batholithic terranes of the North American Cordillera. In addition to their compelling tectonic synthesis, they argue that most of the batholiths are not products of arc magmatism as commonly believed, but instead were formed by slab failure during and after collision. They show that slab window and Precambrian TTG suites share many geochemical similarities with Cretaceous slab failure rocks. Geochemical and isotopic data indicate that the slab failure magmas were derived dominantly from the mantle and thus have been one of the largest contributors to growth of continental crust. The authors also note that slab failure plutons emplaced into the epizone are commonly associated with Cu-Au porphyries, as well as Li-Cs-Ta pegmatites.
Author : David M. Miller,Cathy Busby
Publisher : Geological Society of America
Page : 434 pages
File Size : 52,6 Mb
Release : 1995
Category : Science
ISBN : 9780813722993
Demonstrating the multidisciplinary approach currently used to understand Jurassic magmatism and tectonics in western North America, 19 papers report a wealth of new data in the fields of structural geology, igneous petrology and isotope geochemistry, geochronology, sedimentology, and volcanology. T
Author : M. Brown,P.A. Candela,D.L. Peck,W.E. Stephens,R.J. Walker,E-an Zen
Publisher : Geological Society of America
Page : 352 pages
File Size : 48,8 Mb
Release : 1996-01-01
Category : Science
ISBN : 9780813723150
Author : A. Krishna Sinha,Joseph Bruce Whalen,John P. Hogan
Publisher : Geological Society of America
Page : 892 pages
File Size : 44,6 Mb
Release : 1997-01-01
Category : Science
ISBN : 0813711916
The thermal evolution of mountain belts is recorded inthe distribution, origin and ages of magnatism. In this volume, petrologic, isotopic and geochemical evidence is presented to highlight the contribution of igneous rocks to the evolution of the Appalachian Orogen in both Canada and the United States. These papers emphasize the use of modern geochemical and petrologic data to discriminate the sources yielding magmas, and thus the nature of the crust and mantle.
Author : Robert S. Hildebrand
Publisher : Geological Society of America
Page : 80 pages
File Size : 51,8 Mb
Release : 2009-01-01
Category : Science
ISBN : 9780813724577
Within the Sonora segment to the south, break-off magmatism was also prevalent. Both the Canadian and Sonoran segments have abundant porphyry copper mineralization temporally and spatially associated with the break-off magmas, which suggests a genetic link between slab failure and porphyry copper mineralization. By 53 Ma, eastwardly dipping subduction of Pacific Ocean crust was generating arc magmatism on the amalgamated Cordilleran collision zone in both the Canadian and Sonoran segments. Oceanic schists, such as the Orocopia-Pelona-Rand, were formed in the ocean basin west of Rubia and accreted during initiation of the new easterly dipping subduction zone. A major transform fault, called the Phoenix fault, connects the Sevier fold-thrust belt at the California-Nevada border with that in eastern Mexico and separates the Great Basin and Sonoran segments. It juxtaposes the Sierra-Mojave-Sonora block alongside the Transition Zone of the Colorado Plateau. Cordilleran events affected the subsequent development of western North America. For example, the structural Basin and Range Province appears to coincide with the region where exotic allochthons sit atop North American crust in both the Great Basin and Sonoran segments. Also, within the triangular Columbia embayment, large segments of Rubia appear to have escaped laterally during the Cordilleran orogeny to create a lithospheric "hole" that was later filled by basalt of the Columbia River and Modoc plateaux.
Author : P. E. Brown,B. W. Chappell
Publisher : Geological Society of America
Page : 520 pages
File Size : 47,7 Mb
Release : 1992-01-01
Category : Science
ISBN : 9780813722726
Author : Mark Cloos
Publisher : Geological Society of America
Page : 284 pages
File Size : 50,9 Mb
Release : 2007-01-01
Category : Science
ISBN : 9780813724195
Author : Robert Bruce Miller,Arthur W. Snoke
Publisher : Geological Society of America
Page : 324 pages
File Size : 47,7 Mb
Release : 2009
Category : Science
ISBN : 9780813724560
"Exposed crustal cross sections provide a unique direct view of continental crust, and are a major source of insights into variations in lithologic and geochemical composition, structural style, metamorphism, plutonism, and rheology with progressive depth through the crust. This volume provides a synthesis of crustal cross sections with a special emphasis on Phanerozoic sections from the western North American Cordillera, supplemented by articles on lower- and mid-crustal sections through Proterozoic crust in North America and Australia, and the classic crustal section of Fiordland, New Zealand. Many of the papers describe multidisciplinary research on crustal sections and include data from various combinations of structural analysis, geochemistry, geothermobarometry, geochronology, geophysics, and other disciplines. The volume also discusses common problems for the interpretation of crustal cross sections, including how sections that expose deep-crustal rocks are eventually exhumed, and leading to the conclusion that there is no simple 'standard model' for continental crust. This volume will be useful to those interested in structural geology, tectonics, geodynamics, regional geology, petrology, geochemistry/isotope geology, and geophysics."--Pub. desc.
Author : D.B. Clarke
Publisher : Springer Science & Business Media
Page : 302 pages
File Size : 50,5 Mb
Release : 1992-05-31
Category : Science
ISBN : 0412291703
By stressing the various techniques used to determine the petrogenic history of granites, and by bridging the gap between undergraduate and research texts, this book provides a clear understanding of the current state of knowledge of the granite family.
Author : Geological Survey (U.S.)
Publisher : Unknown
Page : 412 pages
File Size : 50,8 Mb
Release : 1990
Category : Geology
ISBN : UOM:39015023299244
Author : Geological Survey (U.S.)
Publisher : Unknown
Page : 380 pages
File Size : 49,8 Mb
Release : 1990
Category : Geology
ISBN : MINN:31951P009750271
Author : Michael Brown,Philip M. Piccoli
Publisher : Unknown
Page : 180 pages
File Size : 41,8 Mb
Release : 1995
Category : Geology
ISBN : OSU:32435062908827
Author : Andrew G. Fountain,Martha Blair-Tyler,Robert J. Gilliom,Gail P. Thelin,Robert M. Krimmel,Dennis Trabant
Publisher : Unknown
Page : 362 pages
File Size : 51,5 Mb
Release : 1984
Category : Agricultural mapping
ISBN : OSU:32435063189427
