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Reconnaissance U Pb Geochronology Of Precambrian Crystalline Rocks From The Northern Black Hills South Dakota
Download Reconnaissance U Pb Geochronology Of Precambrian Crystalline Rocks From The Northern Black Hills South Dakota full books in PDF, epub, and Kindle. Read online Reconnaissance U Pb Geochronology Of Precambrian Crystalline Rocks From The Northern Black Hills South Dakota ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Reconnaissance U-Pb Geochronology of Precambrian Crystalline Rocks from the Northern Black Hills, South Dakota by : Amiya Kumar Ghosh
Download or read book Reconnaissance U-Pb Geochronology of Precambrian Crystalline Rocks from the Northern Black Hills, South Dakota written by Amiya Kumar Ghosh and published by . This book was released on 2009 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: Th/U-bearing accessory minerals monazite, zircon, and titanite occurring in selected metamorphic and igneous rocks from the northern Black Hills (NBH), South Dakota, were analyzed by standard U-Pb radiometric methods to unravel the Precambrian thermotectonic events that affected the area. Four metapelites from the Crook Mountain borehole contain metamorphic monazites for which EMP spot-analysis yielded total-Pb dates ranging from ~2680-1600 Ma but mostly between ~1790-1650 Ma. Individual spot-dates obtained for the metapelites were grouped according to compositional domains, as revealed by X-ray imagery, whereupon the resultant domain ages resolved into four discrete age clusters of ~1780 [plus or minus] 3 Ma (32% of the dates), ~1751 [plus or minus] 3 Ma (44%), ~1718 [plus or minus] 14 Ma (7%), and ~1650 [plus or minus] 9 Ma (16%, all dates reported at 95% confidence). These dates correspond to thermotectonic and magmatic events previously recognized at these times in the southern Black Hills, and the timing of Homestake gold mineralization is constrained between ~1740 -1718 Ma. Spot-analysis of zircon grains extracted from a Crook Mountain granite pegmatite yielded 207Pb/206Pb upper- and lower-intercept ages of 1718 [plus or minus] 22 Ma and 51 [plus or minus] 17 Ma, which are interpreted as intrusive and uplift ages, respectively. Detrital zircons of magmatic origin from two Black Hills metapelites have also been spot-dated. Five 207Pb/206Pb age populations are recognized at: ~3830 [plus or minus] 8, ~3365 [plus or minus] 5, ~3425 [plus or minus] 7,~3240 [plus or minus] 4, and ~2970 [plus or minus] 11 Ma. These ages indicate zircon provenance from the ~3550-2550 Ma Wyoming craton rather than from the ~2900-2600 Ma Superior craton. Thus, the Black Hills appears to have been part of the Wyoming craton as of 2015-1880 Ma shale deposition.
Book Synopsis Geochronology of Precambrian Basement and Adjacent Rocks, Black Hills, South Dakota by : James A. McCombs
Download or read book Geochronology of Precambrian Basement and Adjacent Rocks, Black Hills, South Dakota written by James A. McCombs and published by . This book was released on 2002 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Precambrian: Conterminous U.S. by : John C. Reed, Jr.
Download or read book Precambrian: Conterminous U.S. written by John C. Reed, Jr. and published by Geological Society of America. This book was released on 1993 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt: This wide-ranging discussion of Precambrian rocks includes contributions from a diverse array of authors actively engaged in investigations of various aspects of U.S. Precambrian geology. Summary discussions by the editors of the five major chapters place these contributions in a logical regional framework.
Book Synopsis Earth's Oldest Rocks by : Martin J. Van Kranendonk
Download or read book Earth's Oldest Rocks written by Martin J. Van Kranendonk and published by Elsevier. This book was released on 2018-09-26 with total page 1114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earth's Oldest Rocks, Second Edition, is the only single reference source for geological research of early Earth. This new edition is an up-to-date collection of scientific articles on all aspects of the early history of the Earth, from planetary accretion at 4.567 billion years ago (Ga), to the onset of modern-style plate tectonics at 3.2 Ga. Since the first edition was published, significant new advances have been made in our understanding of events and processes on early Earth that correspond with new advances in technology. The book includes contributions from over 100 authors, all of whom are experts in their respective fields. The research in this reference concentrates on what is directly gleaned from the existing rock record to understand how our planet formed and evolved during the planetary accretion phase, formation of the first crust, the changing dynamics of the mantle and style of tectonics, life's foothold and early development, and mineral deposits. It is an ideal resource for academics, students and the general public alike. - Advances in early Earth research since 2007 based primarily on evidence gleaned directly from the rock record - More than 50% of the chapters in this edition are new and the rest of the chapters are revised from the first edition, with more than 700 pages of new material - Comprehensive reviews of areas of ancient lithosphere from all over the world, and of crust-forming processes - New chapters on early solar system materials, composition of the ancient atmosphere-hydrosphere, and overviews of the oldest evidence of life on Earth, and modeling of early Earth tectonics
Download or read book Treatise on Geochemistry written by and published by Newnes. This book was released on 2013-10-19 with total page 14787 pages. Available in PDF, EPUB and Kindle. Book excerpt: This extensively updated new edition of the widely acclaimed Treatise on Geochemistry has increased its coverage beyond the wide range of geochemical subject areas in the first edition, with five new volumes which include: the history of the atmosphere, geochemistry of mineral deposits, archaeology and anthropology, organic geochemistry and analytical geochemistry. In addition, the original Volume 1 on "Meteorites, Comets, and Planets" was expanded into two separate volumes dealing with meteorites and planets, respectively. These additions increased the number of volumes in the Treatise from 9 to 15 with the index/appendices volume remaining as the last volume (Volume 16). Each of the original volumes was scrutinized by the appropriate volume editors, with respect to necessary revisions as well as additions and deletions. As a result, 27% were republished without major changes, 66% were revised and 126 new chapters were added. In a many-faceted field such as Geochemistry, explaining and understanding how one sub-field relates to another is key. Instructors will find the complete overviews with extensive cross-referencing useful additions to their course packs and students will benefit from the contextual organization of the subject matter Six new volumes added and 66% updated from 1st edition. The Editors of this work have taken every measure to include the many suggestions received from readers and ensure comprehensiveness of coverage and added value in this 2nd edition The esteemed Board of Volume Editors and Editors-in-Chief worked cohesively to ensure a uniform and consistent approach to the content, which is an amazing accomplishment for a 15-volume work (16 volumes including index volume)!
Book Synopsis Geology of the Black Hills, South Dakota and Wyoming by : Fredrick J. Rich
Download or read book Geology of the Black Hills, South Dakota and Wyoming written by Fredrick J. Rich and published by . This book was released on 1985 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Precambrian by : John Calvin Reed (Jr.)
Download or read book Precambrian written by John Calvin Reed (Jr.) and published by . This book was released on 1993 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geochronology and Thermochronology of Precambrian Basement Drill Core Samples in Nebraska and Southeastern South Dakota by : Angela Lynn Hull
Download or read book Geochronology and Thermochronology of Precambrian Basement Drill Core Samples in Nebraska and Southeastern South Dakota written by Angela Lynn Hull and published by . This book was released on 2013 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ancient geology of midcontinent North America preserves a unique glimpse into tectonic processes that culminated in the formation of stable continental lithosphere. Much is known about the tectonic and crustal evolution in regions where Precambrian bedrock is exposed for direct observation (i.e. Rocky Mountains and the Lake Superior region). However, thick Phanerozoic sedimentary cover overlying the central Yavapai Province, between the Rockies and the Great Lakes, limits our knowledge of that important region. Drill core samples provide the only means to directly survey this zone of the midcontinent. Here I present the results of U-Pb and Lu-Hf zircon geochronology, and Ar-Ar thermochronology obtained from Paleoproterozoic basement drill core samples of the central Yavapai Province from easternmost Colorado and Nebraska, and from older rocks in southern South Dakota. LA-ICP-MS U-Pb geochronology analyses yielded six new zircon ages ranging from 1694 Ma to 1825 Ma in the central Yavapai Province and one age of 2653±11 Ma from southern South Dakota. The same zircon separates were analyzed for Lu-Hf tracer data and yielded overall, positive mean initial eHf values ranging from +1.65 to +8.45 with the exception of the Archean S.D. sample which yielded a slight negative initial eHf value of -0.28. 40Ar-39Ar mineral analyses from mainly micas yielded age spectra that varied from well-behaved to complex. Mineral ages from the central Yavapai Province were consistently younger than anticipated, ranging in age from ca. 1138-1267 Ma for micas and 1487 Ma for hornblende. Mineral ages from the South Dakota region ranged from ca. 1728-1869 Ma (micas) and 2449 Ma (hornblende), consistent with previous results in the area. The new Hf results analyzed here provide the first regional perspective of midcontinent crustal provenance. Overall positive initial eHf values from the central Yavapai samples demonstrate crust across a broad region of the Midcontinent was largely derived from a juvenile source with contributions of slightly older reworked crust. This is consistent with the long held arc accretion model for the formation of Laurentia. Ar-Ar mineral ages are the first supplied for South Dakota and the central Yavapai Province. In South Dakota, Ar-Ar results provide a thermochronologic context to the relatively sparse basement data that exists here, extending boundaries of the East-Central Minnesota Batholith farther westward, revealing Archean crust within the Proterozoic Mobile Belts, and supplying post-metamorphic cooling details to nearby Trans Hudson and Penokean Orogenic events. Anomalously young Ar-Ar mica ages across the central Yavapai Province, stretching from eastern Colorado across Nebraska, are most striking and indicate a regional Neoproterozoic thermal overprinting event. We attribute overprinting to be the result of "squeegee" tectonics in which Grenvillian thrusting caused transport of warm, hydrothermal fluids from buried margin sediments into the continental interior inducing laterally extensive thermal resetting and fluid alteration there.
Book Synopsis Structure and Mineralization of Precambrian Rocks in the Galena-Roubaix District, Black Hills, South Dakota by : Richard William Bayley
Download or read book Structure and Mineralization of Precambrian Rocks in the Galena-Roubaix District, Black Hills, South Dakota written by Richard William Bayley and published by . This book was released on 1970 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Road Log written by Perry H. Rahn and published by . This book was released on 1977 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications of the Geological Survey by :
Download or read book Publications of the Geological Survey written by and published by . This book was released on 1971 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Principles of Precambrian Geology by : Alan M. Goodwin
Download or read book Principles of Precambrian Geology written by Alan M. Goodwin and published by Elsevier. This book was released on 1996-06-18 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles of Precambrian Geologyis an update to the 1991 book, Precambrian Geology: The Dynamic Evolution of the Continental Crust, by the same author. The new edition covers the same topics in a more concise and accessible format and is replete with explanatory figures, tables, and illustrations. The book serves as a modern comprehensive statement on the Earth's Precambrian crust, covering the main aspects of distribution, lithiostratigraphy, age, and petrogenesis of Precambrian rocks by continent within the context of the Earth's evolving continental crust. Principles of Precambrian Geology provides a suitable framework for assessing various Earth dynamic and biospheric hypotheses, including the modern plate tectonic paradigm and the Gaian hypothesis. Despite the concise format, the new edition provides extensive updated references to support the information presented. It is designed to serve the needs of student, teacher, explorationist and general student of the continental crust. - Updated to provide more concise accessible information - Extensive illustrations, tabulations, and maps - Provides a framework for assessing recent hypothesis on Earth dynamics - Covers main aspects of distribution, lithostratigraphy, age, and protogenesis of Precambrian rocks
Book Synopsis Precambrian Geology and Metamorphic Petrology by : Qian Xianglin
Download or read book Precambrian Geology and Metamorphic Petrology written by Qian Xianglin and published by VSP. This book was released on 1998 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of the 30th International Geological Congress held in Beijing, China in August 1997. This volume focuses on Precambrian geology and metamorphic petrology. It aims to present a view of contemporary geology to researchers interested in the geological sciences.
Book Synopsis Precambrian Geochronology of Part of Northwestern Saudi Arabia, Kingdom of Saudi Arabia by : Carl E. Hedge
Download or read book Precambrian Geochronology of Part of Northwestern Saudi Arabia, Kingdom of Saudi Arabia written by Carl E. Hedge and published by . This book was released on 1984 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications of the U.S. Geological Survey, 1971-1981 by :
Download or read book Publications of the U.S. Geological Survey, 1971-1981 written by and published by . This book was released on 1986 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geology of the Precambrian Rocks of the Keystone Pegmatite District, Southern Black Hills, South Dakota by : James Jennings Norton
Download or read book Geology of the Precambrian Rocks of the Keystone Pegmatite District, Southern Black Hills, South Dakota written by James Jennings Norton and published by . This book was released on 1957 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geochronological Studies of Precambrian Rocks from the Southern District of Keewatin by : W. D. Loveridge
Download or read book Geochronological Studies of Precambrian Rocks from the Southern District of Keewatin written by W. D. Loveridge and published by Geological Survey of Canada. This book was released on 1988 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geochronological studies have been carried out on rocks from three separate areas in the southern district of Keewatin, Northwest Territories; the geology of the area is also summarized.
