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The Archaean: Geological and Geochemical Windows into the Early Earth de Andrew Y. Glikson

The Archaean: Geological and Geochemical Windows into the Early Earth: Modern Approaches in Solid Earth Sciences, cartea 9

Autor Andrew Y. Glikson
en Limba Engleză Hardback – 19 aug 2014
Archaean terrains contain a wealth of structural, stratigraphic, textural, mineralogical, geochemical and isotopic features allowing insights into the nature of the early Earth. This book is based on studies during 1964-2007 of Archaean terrains in Australia and to a lesser extent in South Africa and India, as well as on visits to Archaean terrains in Canada, the US and China, as well as petrological and geochemical studies of igneous and sedimentary rock suites from a range of terrains. The book will include a range of photographic and microscopic images, geological sketch maps and diagrams illustrating the lessons derived from field and the laboratory. Also other Archaean terrains are being reviewed.
The book is intended for Earth scientists as well as broader intelligent readership.
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Specificații

ISBN-13: 9783319079073
ISBN-10: 3319079077
Pagini: 252
Ilustrații: XIV, 238 p. 107 illus., 79 illus. in color. With online files/update.
Dimensiuni: 155 x 235 x 18 mm
Greutate: 0.53 kg
Ediția:2014
Editura: Springer International Publishing
Colecția Springer
Seria Modern Approaches in Solid Earth Sciences

Locul publicării:Cham, Switzerland

Public țintă

Research

Cuprins

Preface.- Field features of Archaean greenstone terrains.- Archaean Volcanism.- Archaean Plutonism.- Asteroid and comet impacts.-Archaean sedimentation.- Early life forms.- Secular geochemical trends.- Global Archaean tectonics.- Archaean crustal evolution – a synthesis.

Recenzii

“The book is global in scope and discusses the data on early Earth from sites in southwest Greenland, Canada, Australia, India, South Africa, and more. … The volume is well supported by numerous tables, color photographs, color and black-and white illustrations, appendixes, an extensive 30-page list of references, and a 13-page subject/geographic index. Summing Up: Recommended. Graduate students, researchers/faculty, and professionals/practitioners.” (J. T. Andrews, Choice, Vol. 52 (11), July, 2015)
“The author provides an extensive overview of the geochronological data pertaining to the Archean, and integrates this with geochemical and isotopic information. … The author has done a commendable job of compiling a mountain of geochronological and isotopic data, much of which is helpfully collated into an Appendix. … The book will be useful for research-oriented workers dealing with Archean rocks.” (Brett Davis, TAG The Australian Geologist, Issue 174, March, 2015)
 

Textul de pe ultima copertă

Determinations of the age of the Earth as 4.54 ± 0.05 billion years (Ga) leave large part of its earliest history unknown. Isotopic and geochemical signatures in rocks as old as ~4.0 Ga indicate an evolutionary trend from mafic-ultramafic crust to tonalite-trondhjemite-granodiorite (TTG)-dominated micro continental nuclei. To date signatures of the 3.95 – 3.85 Ga Late heavy Bombardment (LHB), manifested by the lunar Mare, have not been discovered on Earth. Recent discoveries of near to 14 Archaean impact ejecta units up to 3.48 Ga-old intercalated with volcanic and sedimentary rocks in the Barberton and Pilbara greenstone belts, including clusters about 3.25 – 3.22 Ga and 2.63 – 2.48 Ga in age, may represent terrestrial vestiges of an extended LHB. The interval of ~3.25 – 3.22 Ga-ago emerges as a major break in Archaean crustal evolution when major asteroid bombardment resulted in faulting, large scale uplift, intrusion of granites and an abrupt shift from crustal conditions dominated by mafic-ultramafic crust associated with emplacement of TTG plutons, to semi-continental nuclei represented by arenites, turbidites, conglomerate, banded iron formations and felsic volcanics. At this stage pre-3.2 Ga dome-structured granite-greenstone systems were largely replaced by linear accretional granite-greenstone systems such as the Superior Province in Canada, Yilgarn Craton and the western Pilbara Craton, compared by some authors to circum-Pacific arc-trench settings. A fundamentalgeotectonic transformation is consistent with the increasing role of garnet fractionation as indicated by Al-depleted and plagioclase-enriched magmatic compositions, suggesting cooler high P/T (pressure/temperature) mantle and crustal magma sources, consistent with development of subduction. A concentration of large impacts during 2.63 – 2.48 Ga potentially accounts for peak magmatic events culminating the Archaean era. However, strict comparisons between the Archaean systems and modern Arc-trench geotectonic setting will be shown to be unwarranted. The book provides an excursion through granite-greenstone terrains, and to a lesser extent high-grade metamorphic terrains, focusing on relic primary features including volcanic, sedimentary, petrological, geochemical and paleontological elements, with the aim of elucidating the nature of original environments and processes which dominated environments in which early life forms have emerged. By contrast to uniformitarian models, which take little or no account of repeated impacts of large asteroid clusters and their effects during ~3.47 – 2.48 Ga, the Archaean geological record is consistent with the theory of asteroid impact-triggered volcanic activity originally advanced by D.H. Green in 1972 and 1981.

Caracteristici

Includes chapter and section summaries Superbly illustrated Early Earth features and early life habitats Evolution of the continents Early volcanic activity Presents an Atlas of Archaean environments Includes supplementary material: sn.pub/extras