Field Trip Guidebook for Selected Areas in Precambrian Geology of Northeastern Minnesota
Author :
Publisher :
Page : 80 pages
File Size : 31,79 MB
Release : 1987
Category : Geology
ISBN :
Author :
Publisher :
Page : 80 pages
File Size : 31,79 MB
Release : 1987
Category : Geology
ISBN :
Author :
Publisher :
Page : 230 pages
File Size : 44,63 MB
Release : 2009
Category : Geology
ISBN :
Author : Richard A. Spohn
Publisher :
Page : 392 pages
File Size : 44,63 MB
Release : 1996
Category : Reference
ISBN :
Author : James D. Miller
Publisher : Geological Society of America
Page : 593 pages
File Size : 20,12 MB
Release : 2011-01-01
Category : Science
ISBN : 0813700248
Author : Geoscience Information Society. Guidebooks Committee
Publisher :
Page : 244 pages
File Size : 47,25 MB
Release : 1986
Category : Science
ISBN :
Author :
Publisher :
Page : 240 pages
File Size : 26,13 MB
Release : 1986
Category : Geology
ISBN :
Author :
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Page : 180 pages
File Size : 41,35 MB
Release : 1987
Category : Geology
ISBN :
Author :
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Page : 186 pages
File Size : 50,91 MB
Release : 2007
Category : Geology
ISBN :
Author : John C. Reed, Jr.
Publisher : Geological Society of America
Page : 752 pages
File Size : 32,52 MB
Release : 1993
Category : Science
ISBN : 081375447X
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.
Author : K.C. Condie
Publisher : Elsevier
Page : 553 pages
File Size : 32,65 MB
Release : 1993-02-03
Category : Science
ISBN : 0080869092
As a final product of the International Geological Correlation Program (IGCP) Project 217, this volume brings together significant advances in the understanding of Proterozoic crustal evolution. This IGCP Project focussed on nine research objectives: 1) Comparison of Archean and Proterozoic supracrustal assemblages to more fully understand differences between Archean and post-Archean tectonic regimes; 2) To more fully understand the geochemical differences between Archean and post-Archean sediments and to evaluate the various factors that control sediment composition; 3) From combined U/Pb zircon and whole-rock Sm/Nd studies, to see if the apparent 2.4-2.0 continental crust "generation gap" is real; 4) To employ new techniques in the dating of individual zircons to more fully understand Proterozoic tectonic history and the role of crustal reworking; 5) From trace element ratios and Nd isotopic data from basalts, to better understand Proterozoic mantle evolution; 6) To encourage more detailed studies of the anorogenic granite-anorthosite association to better understand its origin and significance in terms of crustal evolution; 7) From combined Nd, Pb, and Sr isotopic data, to more precisely estimate the amount of new continental crust formed during the Proterozoic; 8) To encourage joint P-T and geochronological studies of Proterozoic and high-grade terranes to better understand Proterozoic orogenesis: and 9) To try and understand why hydrothermal precious metal deposits are relatively rare in the Proterozoic compared to both the Archean and the Phanerozoic. The book should be of interest to professionals in the geosciences (especially geochemists, petrologists and structural geologists) and graduate students in the same fields.