Results 11 to 20 of about 7,100 (219)

Large Igneous Province Record Through Time and Implications for Secular Environmental Changes and Geological Time‐Scale Boundaries

open access: yesGeophysical Monograph Series, Page 1-26., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Richard E. Ernst   +8 more
wiley  

+5 more sources

Kimberlites I: Kimberlites and Related Rocks. Kimberlites II: The Mantle and Crust‐Mantle Relationships [PDF]

open access: yesEos, Transactions American Geophysical Union, 1985
These volumes open with a tribute to academician Vladimir Stepanovich Sobolev, who died several days before the opening of the Third International Kimberlite Conference at Clermont Ferrand, France. V.S. Sobolev made major contributions to the field of kimberlite and upper mantle petrology throughout his lifetime and did much to spark the renaissance in
Albee, Arden L.
openaire   +3 more sources

Phase Diagrams of Carbonate Materials at High Pressures, with Implications for Melting and Carbon Cycling in the Deep Earth

open access: yesGeophysical Monograph Series, Page 137-165., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Konstantin Litasov   +3 more
wiley  

+5 more sources

40Ar/39Ar geochronology of phlogopites and its mineralization in the Mithapukur kimberlites: New Lower Cretaceous (∼109–115 Ma) kimberlitic occurrences in Bangladesh

open access: yesJournal of Asian Earth Sciences: X, 2022
Phlogopites in a suite of ultramafics from Bangladesh have been analyzed to ascertain the mineralization and the timing of cooling of phlogopites and reveal their emplacement tectonics.
Ismail Hossain   +3 more
doaj   +1 more source

Sulfur Isotope Constraints on the Petrogenesis of the Kimberley Kimberlites

open access: yesGeochemistry, Geophysics, Geosystems, 2021
Cretaceous kimberlites in southern Africa have been suggested to host deeply subducted material in their mantle sources based on radiogenic isotope systematics. However, potential subducted material contributions to the volatile budget, including sulfur,
Angus Fitzpayne   +5 more
doaj   +1 more source

DYNAMIC PHYSICAL-GEOLOGICAL MODEL OF THE FIELD OF DIAMONDS FROM THE KOMSOMOLSKAYA KIMBERLITE PIPE (ALAKIT-MARKHA FIELD OF WESTERN YAKUTIA)

open access: yesГеодинамика и тектонофизика, 2022
Petrophysical, tectonophysical and paleomagnetic studies were done on the field of diamonds from the Komsomolskaya kimberlite pipe to interpret the observed gravimagnetic field. As a result of studying the structural-material complexes (SMC) of the field,
K. M. Konstantinov, A. S. Gladkov
doaj   +1 more source

Metasomatized lithospheric mantle for Mesozoic giant gold deposits in the North China craton [PDF]

open access: yes, 2020
The origin of giant lode gold deposits of Mesozoic age in the North China craton (NCC) is enigmatic because high-grade metamorphic ancient crust would be highly depleted in gold.
Becker, Harry   +9 more
core   +1 more source

Petrogenetic processes in the ultramafic, alkaline and carbonatitic magmatism in the Kola Alkaline Province: a review [PDF]

open access: yes, 2005
Igneous rocks of the Devonian Kola Alkaline Carbonatite Province (KACP) in NW Russia and eastern Finland can be classified into four groups: (a) primitive mantle-derived silica-undersaturated silicate magmas; (b) evolved alkaline and nepheline syenites; (
Balaganskaya, E.   +4 more
core   +1 more source

Theoretical petrology [PDF]

open access: yes, 1979
The central issues in petrology have remained remarkably unchanged in the last 50 years. In igneous petrology, the focus is on understanding the nature and cause of diversity in igneous rocks: on identifying primary magma types and constraints on the ...
Stolper, Edward
core   +1 more source

Archaean and Proterozoic diamond growth from contrasting styles of large-scale magmatism [PDF]

open access: yes, 2017
Precise dating of diamond growth is required to understand the interior workings of the early Earth and the deep carbon cycle. Here we report Sm-Nd isotope data from 26 individual garnet inclusions from 26 harzburgitic diamonds from Venetia, South Africa.
Chinn, Ingrid L.   +5 more
core   +3 more sources

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