Author: Karin AppelquistPublisher:
ISBN: 9789162879068
Category :
Languages : en
Pages : 33
Book Description
Proterozoic Crustal Evolution in Southcentral Fennoscandia
Author: Karin AppelquistPublisher:
ISBN: 9789162879068
Category :
Languages : en
Pages : 33
Book Description
Proterozoic Crustal Evolution
Author: K.C. CondiePublisher: Elsevier
ISBN: 0080869092
Category : Science
Languages : en
Pages : 553
Book Description
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.
Dyke Swarms - Time Markers of Crustal Evolution
Author: E. HanskiPublisher: CRC Press
ISBN: 0415889383
Category : Science
Languages : en
Pages : 282
Book Description
Dyke swarms are remnants of large igneous provinces, and are pointers of continental break-up events, as well as indicators for ancient continental reconstructions. These global geodynamic aspects are of crucial significance in tectonics, and with recent developments in high-precision age, dating it has become possible to enter these short-lived ma
Proterozoic tectonic and crustal evolution of the Upper Great Lakes region, North America
Author: Daniel K. HolmStructural and Geochemical Investigation of Proterozoic Crustal Evolution in the Weekeroo Area, Olary Domain, South Australia
Author: Michael Ashley SzpunarPublisher:
ISBN:
Category :
Languages : en
Pages : 64
Book Description
PROTEROZOIC Crustal and Metallogenic Evolution
Author: Proterozoic East Gondwana
Author: Masaru YoshidaPublisher: Geological Society of London
ISBN: 9781862391253
Category : Science
Languages : en
Pages : 486
Book Description
This volume focuses on Late Mesoproterozoic to early Cambrian events related to Gondwana assembly and break up. The nineteen papers provide a comprehensive review including advanced knowledge and new data from all critical areas of East Gondwana. The recent knowledge of the evolution of East Gondwana, which was regarded as an integral part of the Mesoproterozoic supercontinent Rodinia, is the major theme of the volume, which is reinforced by highlighting this radical and new understanding of the evolution of this region.
Constraints on Proterozoic Crustal Evolution from an Isotopic and Geochemical Study of Clastic Sediments of the Gawler Craton, South Australia
Author: Clayton Andrew SimpsonPublisher:
ISBN:
Category :
Languages : en
Pages : 58
Book Description
Crustal Evolution in the Late Proterozoic
Author: R. J. SternPrecambrian Geology of Finland
Author: Martti LehtinenPublisher: Elsevier
ISBN: 0080457592
Category : Science
Languages : en
Pages : 751
Book Description
Focusing on the Precambrian in the central part of the Fennoscandian Shield, the book combines the results from modern geological and geophysical research into a detailed petrologic, lithologic, and structural synthesis and interpretation of the Archean and Proterozoic of Finland. It will be of value to anyone interested in the evolution of the shield in particular and in Precambrian geology in general.