Results 21 to 30 of about 9,903 (199)
Geosciences, 2022 Тhe task of searching for kimberlite pipes in covered areas of the Yakutia kimberlite province is very difficult due to the significant heterogeneity of the rocks overlying kimberlite pipes.
Alexander K. Saraev +2 more
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Evidence for a reducing Archean ambient mantle and its effects on the carbon cycle [PDF]
, 2016 Chemical reduction-oxidation mechanisms within mantle rocks link to the terrestrial carbon cycle by influencing the depth at which magmas can form, their composition, and ultimately the chemistry of gases released into the atmosphere.
Aulbach, Sonja, Stagno, Vincenzo
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Review of the spatial distribution of kimberlite pipes in the tectonic structures of the world
Geo&BioKimberlite pipes are vertical or inclined cylindrical or cone-shaped bodies filled with kimberlite, an ultramafic igneous rock. The diameter of kimberlite pipes can vary from a few metres to 1.5 km, and their depth reaches several kilometres.
Andrii Luniachek
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Archaean and Proterozoic diamond growth from contrasting styles of large-scale magmatism [PDF]
, 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
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Frontiers in Earth Science, 2023 Kimberlite in the Mengyin area serves as an excellent medium for studying the characteristics and evolutionary processes of the Paleozoic mantle. In order to determine the age of the primary calcite within the kimberlite, in situ carbonate U–Pb dating ...
Ruicong Tian +9 more
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CO 2 Solubility in Kimberlite melts CO 2 Solubility in Kimberlite melts [PDF]
, 2015 International audienceCarbon dioxide is the most abundant volatile in kimberlite melts and its solubility exerts a prime influence on the melt structure, buoyancy, transport rate and hence eruption dynamics.
Gaillard, Fabrice +4 more
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Syn-eruptive agglutination of kimberlite volcanic ash
Volcanica, 2020 Pyroclastic deposits of the Holocene Igwisi Hills kimberlite volcanoes, Tanzania, preserve unequivocal evidence for rapid, syn-eruptive agglutination.
David Haddock +6 more
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Oxide minerals of Kaavi kimberlites (Finland)
Известия высших учебных заведений: Геология и разведка, 2019 The mineralogical and petrogeochemical features of the Neoproterozoic kimberlite rocks of the Lahtojoki and Niilonsuo pipes of the Kaavi cluster (Kaavi-Kuopio, Finland) have been studied, differences in their petrogeochemical composition, quantitative ...
N. S. Azarova +4 more
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Геодинамика и тектонофизика, 2022 This paper reports the results on the composition of lithosphere mantle under the Mirny kimberlite field. The authors investigated 57 samples of the mantle xenoliths collected from the Mir pipe.
T. V. Kalashnikova +3 more
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Using perovskite to determine the pre-shallow level contamination magma characteristics of kimberlite [PDF]
, 2014 It remains difficult to obtain reliable geochemical signatures of uncontaminated kimberlite magma from bulk rock studies due to the combined effects of crustal assimilation and element mobility during post-emplacement alteration processes.
Hawkesworth, Chris J. +2 more
core +2 more sources