Results 31 to 40 of about 6,833 (203)
, 2021 Kimberlites are the deepest mantle magmas to reach the surface of the Earth and the hosts of the major primary diamond deposits. The enigmatic nature of kimberlites owing to poorly constrained triggers of kimberlite magmatism, melt composition, and ...
Chow, Richard
core
, 2011 The Jericho kimberlite (173.1. ±. 1.3. Ma) is a small (~. 130. ×. 70. m), multi-vent system that preserves products from deep (>. 1. km?) portions of kimberlite vents.
Cas, R.A.F. +3 more
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Origins of olivine in Earth’s youngest kimberlite: Igwisi Hills volcanoes, Tanzania craton [PDF]
, 2021 Monomineralic millimeter-sized olivine nodules are common in kimberlites worldwide. It is generally thought that such ‘dunitic nodules’ originate from the base of the cratonic lithosphere and that their formation marks the onset of deep-rooted kimberlite
Tappe, Sebastian +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
doaj +1 more source
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
doaj +1 more source
XENOLITHS OF POLYMICTIC BRECCIAS FROM KIMBERLITES OF THE YAKUTIAN DIAMONDIFEROUS PROVINCE
Геодинамика и тектонофизика, 2022 The polymictic breccias, extremely rare mantle conglomerates being the fragments of rocks and large mantle minerals cemented with fine-grained mass have been long provoking interest of petrologists worldwide.
L. N. Pokhilenko +2 more
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, 2008 The paper presents data on petrology, bulk rock and mineral compositions, and textural classification of the Middle Jurassic Jericho kimberlite (Slave craton, Canada). The kimberlite was emplaced as three steep-sided pipes in granite that was overlain by
Hayman, Patrick, Kopylova, Maya G.
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, 2011 The Jurassic Muskox and Jericho kimberlites (Northern Slave Province, Nunavut, Canada) contain a variety of facies exhibiting different geometries, contact relationships, internal organisation, country rock abundance and olivine shapes, although many ...
Cas, R.A.F. +3 more
core +1 more source
Kimberlites Identification by Classification Methods [PDF]
, 2007 Kimberlites identification is a very important task for diamond mining. In traditional way, geologists draw upon past experience to do this work. Whether the bedrock should be drilled depends on their analysis of rock samples. This method has two disadvantages.
Yaohui Chai +4 more
openaire +4 more sources
Kimberlite Volcanology: Transport, Ascent, and Eruption [PDF]
, 2019 Kimberlite rocks and deposits are the eruption products of volatile-rich, silica-poor ultrabasic magmas that originate as small-degree mantle melts at depths in excess of 200 km.
Kavanagh, Janine +2 more
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