geochemistry and petrogenesis of Archaean and palaeoproterozoic dykes and sills of Zimbabwe
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geochemistry and petrogenesis of Archaean and palaeoproterozoic dykes and sills of Zimbabwe

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Published by University of Portsmouth, School of Earth, Environmental and Physical Sciences in Portsmouth .
Written in English


Book details:

Edition Notes

Thesis (Ph.D.) - University of Portsmouth, 2000.

Statementby Heather M. Stubbs.
ID Numbers
Open LibraryOL18461012M

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  The geochemical anomalies described above are quite common in Archaean–Palaeoproterozoic intracontinental magmatic rocks coeval with the BDM (Vogel et al., a) and the debate regarding the magmatic source of such widespread rocks which retain signatures more associated with modern subduction-related rocks is ongoing (Baker et al., , Gallagher and Cited by: 4. Paleoproterozoic mafic intrusive rocks from the western Arunachal Himalaya have been studied for understanding their petrogenesis and tectonic environment, in which they were emplaced, with the help of their bulk‐rock major, trace, and rare‐earth elements (REE) compositions. These mafic intrusive rocks, mostly small bodies of dykes, sills, and lenses, are exposed in the Higher as well as the Lesser Cited by: 7. The Blue Draw Metagabbro (BDM) in western South Dakota, is an m thick, layered intrusion, which is interpreted to have been intruded as a rift-related subvolcanic sill during the Palaeoproterozoic. The age and tectonic setting of the BDM are similar to those recorded by the East Bull Lake Suite of layered intrusions in Southern by: 4. Geochemistry, petrogenesis, and geodynamic implications of NE – SW to ENE – WSW trending Palaeoproterozoic mafic dyke swarms from southern region of the western Dharwar Craton.

1 INTRODUCTION. Identification of distinct mafic magmatic events (in any mode such as dykes, sills, plugs, and volcanics) is an important tool to understand a number of geological aspects in space and time, particularly during the Precambrian (Hall & Hughes, ).At the early periods of Earth's history, the mantle was more capable to produce high‐temperature mafic magmas than in the.   Abstract. The Palaeoproterozoic Magondi Supergroup lies unconformably on the Archaean granitoid-greenstone terrain of the Zimbabwe Craton and experienced deformation and metamorphism at – Ga to form the Magondi Mobile Belt. The Magondi Supergroup comprises three lithostratigraphic units. Volcano-sedimentary rift deposits (Deweras Group) are unconformably . M.D. Prendergast, The Bulawayan Supergroup: a late Archaean passive margin-related large igneous province in the Zimbabwe craton, Journal of the Geological Society, /, , 3, (), (). Petrology and geochemistry of mafic dyke and sills in Cumbum Formation, of the Proterozoic Nallamalai fold belt, Rajampet area, Andhra Pradesh, India July DOI: /s

  Geochemistry of mafic sills in southern Africa supports an Umkondo LIP at Ga. Major subgroup identical to lavas and sills in Zimbabwe, widespread in South Africa. Derived by high degree of partial melting from subduction-modified mantle. A minor subgroup from a modified MORB-like source occurs only in Middelburg basin. Contamination by crust largely ruled out in favour of . Purchase Archaean Geochemistry, Volume 1 - 1st Edition. Print Book & E-Book. ISBN , Introduction. Archaean Geochemistry - The realisation that the continental crust contains well-preserved relics which date as far back as 4/5 of the Earth's age has given a great impetus to the study of early Precambrian terrains. As late as the mid-sixties the Archaean still constituted the 'terra-in­ cognita' of earth science. Geochemistry and petrogenesis of Archaean and Early Proterozoic siliceous high magnesian basalts Geochemistry and petrogenesis of Archaean and Early Proterozoic siliceous high .