Variolitic Basalts
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Variolitic Basalts
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Author : Murray Ira Jones
language : en
Publisher:
Release Date : 1992
Variolitic Basalts written by Murray Ira Jones and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Basalt categories.
Petrologic Variations Within Submarine Basalt Pillows Of The South Pacific Antarctic Ocean
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Author : Theodore Phillip Paster
language : en
Publisher:
Release Date : 1968
Petrologic Variations Within Submarine Basalt Pillows Of The South Pacific Antarctic Ocean written by Theodore Phillip Paster and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Basalt categories.
The chemistry of submarine basalts has been used in upper mantle petrogenesis models but criteria for selecting fresh, representative samples and an understanding of within-specimen variations are vague. In an effort to define alteration criteria, variations in the mineralogical, chemical and magnetic parameters of one alkalic and eight tholeiitic basalt pillows from abyssal hills in eight widely scattered localities of the Southern Ocean have been studied from glass rim to aphanitic interior. These variations are related to primary cooling (quenching ane deuteric alteration) and secondary alteration (hydration and recrystallization). Four texturally gradational zones are defined from glass rim inward: hydrated glass, unhydrated glass, "variolitic" zone, and aphanitic zone. This transition occurs through a minimum thickness of three centimeters. These zones are also characterized by low intensity of magnetization (J) and low susceptibility (c.g.s. units) in the glass (no opaques), high J and susceptibility in the variolitic zone (very minute opaques), and medium J and susceptibility in the aphanitic basalt (opagues larger than single domain size). Deuteric alteration affects the intensity and coercivity of the basalts. Vesicularity in the eight tholeiites does not exceed 3% at depths greater than 3200 meters which is consistent with physico-chemical data. Three types of alteration are common: (1) glass hydration (>2.0% total H2O) resulting in loss of magnesium and calcium and increase of total iron ferric/ferrous ratio, and potassium; (2) serpentinization adjacent to joints and fractures; and (3) higher temperature deuteric alteration in the aphanitic zone causing depletion of magnesium and total iron as FeO (up to 2.0 wt. percent of rock). The iron migrates to joints where it is oxidized and made available in significant quantities for redeposition in iron-rich sediments and ferro-manganese concretions.
On A Coarsely Spherulitic Variolitic Basalt In Skye
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Author : Charles Thomas Clough
language : en
Publisher:
Release Date : 1898
On A Coarsely Spherulitic Variolitic Basalt In Skye written by Charles Thomas Clough and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1898 with Basalt categories.
Nasa Technical Report
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Author :
language : en
Publisher:
Release Date : 1970
Nasa Technical Report written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Aerodynamics categories.
On The Occurrence Of Two Spherulitic Variolitic Basalt Dykes In Ardmuchnish Argyll
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Author : E. B. Bailey
language : en
Publisher:
Release Date : 1905
On The Occurrence Of Two Spherulitic Variolitic Basalt Dykes In Ardmuchnish Argyll written by E. B. Bailey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1905 with categories.
The Precambrian Earth
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Author : P.G. Eriksson
language : en
Publisher: Elsevier
Release Date : 2004-03-04
The Precambrian Earth written by P.G. Eriksson and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-03-04 with Science categories.
In this book the editors strive to cover all primary (i.e. non-applied) topics in Precambrian geology in a non-partisan way, by using a large team of international authors to present their datasets and highly divergent viewpoints. The chapters address: celestial origins of Earth and succeeding extraterrestrial impact events; generation of continental crust and the greenstone-granite debate; the interaction of mantle plumes and plate tectonics over Precambrian time; Precambrian volcanism, emphasising komatiite research; evolution and models for Earth's hydrosphere and atmosphere; evolution of life and its influence on Precambrian ocean chemistry and chemical sedimentation; sedimentation through Precambrian time; the application of sequence stratigraphy to the Precambrian rock record. Each topic is introduced and a non-partisan closing commentary provided at the end of each chapter. The final chapter blends the major geological events and rates at which important processes occurred into a synthesis, which postulates a number of "event clusters" in the Precambrian when significant changes occurred in many natural systems and geological environments. Also available in paperback, ISBN: 0-444-51509-7
Initial Core Descriptions Deep Sea Drilling Project
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Author : Scripps Institution of Oceanography
language : en
Publisher:
Release Date : 1975
Initial Core Descriptions Deep Sea Drilling Project written by Scripps Institution of Oceanography and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Marine sediments categories.
Lunar Science
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Author :
language : en
Publisher:
Release Date : 1973
Lunar Science written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Lunar geology categories.
Initial Core Descriptions
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Author :
language : en
Publisher:
Release Date :
Initial Core Descriptions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with Marine sediments categories.
Basalts From The Carlsberg Ridge Indian Ocean
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Author : John D. H. Wiseman
language : en
Publisher:
Release Date : 1937
Basalts From The Carlsberg Ridge Indian Ocean written by John D. H. Wiseman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1937 with Basalt categories.