Download or read book Cenozoic Tectono magmatic Evolution of White Pine County Nevada Core Complexes Eocene Oligocene Volcanic Centers Episodic Extension and Shortening and Disseminated Gold Deposits written by and published by . This book was released on 2000 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology and Ore Deposits 2000 written by Geological Society of Nevada. Symposium and published by . This book was released on 2000 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Explore written by and published by . This book was released on 1998 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gold in 2000 written by Steffen Gerd Hagemann and published by . This book was released on 2000 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Late Cenozoic Structure and Evolution of the Great Basin Sierra Nevada Transition written by John S. Oldow and published by Geological Society of America. This book was released on 2009 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book R019 Guidebook to the geology of four Tertiary volcanic centers in central Nevada written by John W. Erwin and published by NV Bureau of Mines & Geology. This book was released on with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Late Cenozoic Evaporite Tectonism and Volcanism in West central Colorado written by Robert M. Kirkham and published by Geological Society of America. This book was released on 2002 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Evolution of the Nevadaplano from Construction to Dismemberment written by Nolan Ryan Blackford and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Documenting the kinematic evolution of structural systems, including the dominant mass transfer processes, the geometry and magnitude of strain, and the thermal architecture of deforming crust is fundamental for interpreting deformation processes. In eastern Nevada and western Utah the hinterland of the Sevier orogeny is interpreted to have been high-elevation orogenic plateau (Nevadaplano) that experience a punctuated tectonothermal event during the late Cretaceous followed by orogenic collapse and high-magnitude Eocene-Oligocene extension. In order to elucidate the kinematic evolution of orogenic crust and its subsequent collapse, we present peak thermal conditions of the Nevadaplano during the Late Cretaceous and investigate the magnitude of subsequent metamorphic core complex extension in the Northern Snake Range, Nevada, USA. Finally, we provide new equations that compare quartz crystallographic preferred orientation fabric intensities with finite strain magnitude calculated from the Northern Snake Range, providing a new method to quantify finite strain magnitude in quartz rich tectonites in regions where deformation markers may be absent or destroyed.At the latitude of ~39 ℗ʻN, thermal field gradients of 29℗ł3 ℗ʻC/km were obtained in the House and Confusion Ranges in westernmost Utah. The Deep Creek, Schell Creek, and Egan Ranges in easternmost Nevada yielded elevated gradients of 49℗ł7 ℗ʻC/km, 36℗ł3 ℗ʻC/km, and 32℗ł6 ℗ʻC/km, respectively. Moving westward, the White Pine, Butte, Pancake, and Fish Creek Ranges exhibit gradients typically between ~20-30 ℗ʻC/km. The elevated thermal gradients in easternmost Nevada are interpreted to have been attained during ~70-90 Ma granitic magmatism and metamorphism, and imply possible partial melting at 9́Æ18 km depths. Our data are compatible with published interpretations of Late Cretaceous lithospheric mantle delamination under the Sevier hinterland, which triggered lower-crustal anatexis and the resulting rise of granitic melts.Following the end of the Sevier orogeny, metamorphic core complexes locally accommodated high-magnitude extension following the collapse of the Sevier orogenic plateau. The footwall of the Eocene-Oligocene Northern Snake Range decollement (NSRD) and west-adjacent Schell Creek Range detachment system, eastern Nevada, preserves a coherent stratigraphy of ductilely deformed Neoproterozoic-Cambrian metasedimentary rocks that are exposed over a 60 km transport-parallel distance, providing an ideal opportunity to quantify ductile strain. Our data demonstrate a dramatic finite strain gradient in the transport direction, from 119% horizontal extension and 59% vertical thinning at the western flank of the Northern Snake Range to 450-1390% extension and 81-94% thinning at the eastern flank. The footwall underwent 18-20 km of cumulative ductile extension, equivalent to 38-43% of the total extension accommodated on brittle structures. Our data are compatible with a rolling hinge model of extension, where brittle displacement on a low-angle detachment was fed downward to a zone of distributed, simple shear-dominant, top-down-to-ESE ductile shearing beneath the quartz crystal-plastic transition, and footwall exhumation progressively migrated eastward.Quantifying finite strain magnitude in the Northern Snake Range is made difficult due to pervasive recrystallization that typically occurs within ductile shear zones and often destroys deformed markers from which finite strain can be measured. Here, we present equations that relate fabric intensity parameters (cylindricity and density norm) to finite strain magnitude. We measured fabric intensity parameters from 77 samples and incorporated 12 published samples across the width of the NSRD footwall and compare fabric intensity parameters to our finite strain data. Finite strain magnitude and fabric intensity increase rapidly up to tectonic strain values of ~20-25, at which point the correlative increase in fabric intensity diminishes with increasing finite strain. We present equations that express fabric intensity as a function of finite strain, and vice versa. The equations presented here can be used to provide a first-order estimate of finite strain magnitude within any ductile shear zone from which quartz fabric intensity can be measured.

Download or read book Cenozoic Rocks of Nevada written by Nevada Bureau of Mines and Geology and published by . This book was released on 1976 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Regional Tectonics and Structural Control of Ore the Major Gold Trends of Northern Nevada written by Geological Society of Nevada. Spring Field Conference and published by . This book was released on 2001 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book GUIDEBOOK TO THE GEOLOGY OF FOUR TERTIARY VOLCANIC CENTERS IN CENTRAL NEVADA written by Nevada Bureau of Mines and Geology and published by . This book was released on 1974 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cenozoic History of the Southern Rocky Mountains written by Bruce Franklin Curtis and published by Geological Society of America. This book was released on 1975 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structure Volcanic Stratigraphy and Ore Deposits of the Pah Rah Range Washoe County Nevada written by and published by . This book was released on 2000 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tectonic and Magmatic Evolution of the Snake River Plain Volcanic Province written by Bill Bonnichsen and published by Idaho Geological Survey. This book was released on 2002 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology and Mineral Deposits of White Pine County Nevada April 28 30 1989 written by and published by . This book was released on 1989 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Economic Geology written by Jeffrey W. Hedenquist and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Potassic Igneous Rocks and Associated Gold Copper Mineralization written by Daniel Müller and published by Springer. This book was released on 2013-04-17 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, there has been increasing interest from geoscientists in potassic ig neous rocks. Academic geoscientists have been interested in their petrogenesis and their potential value in defining the tectonic setting of the terranes into which they were intruded, and exploration geoscientists have become increasingly interested in the association of these rocks with major epithermal gold and porphyry gold-copper deposits. Despite this current interest, there is no comprehensive textbook that deals with these aspects of potassic igneous rocks. This book redresses this situation by elucidating the characteristic features of potassic (high-K) igneous rocks, erecting a hierarchical scheme that allows interpre tation of their tectonic setting using whole-rock geochemistry, and investigating their associations with a variety of gold and copper-gold deposits, worldwide. About two thirds of the book is based on a PhD thesis by Dr Daniel Muller which was produced at the Key Centre for Strategic Mineral Deposits within the Department of Geology and Geophysics at The University of Western Australia under the supervision of Professor David Groves, the late Dr Nick Rock, Professor Eugen Stumpf!, Dr Wayne Taylor, and Dr Brendon Griffin. The remainder of the book has been compiled from the literature using the collective experience of the two authors. The book is dedi cated to the memory of Dr Rock who initiated the research project but died before its completion.