Results 21 to 30 of about 2,685 (149)
Frontiers in Earth Science, 2021 The 2 Ga-old Ihouhaouene alkaline complex (Western Hoggar, Algeria) is among the oldest known carbonatite occurrences on Earth. The carbonatites are calciocarbonatites hosted by syenites, the predominant rock type in the complex.
A. Djeddi +6 more
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UNIQUE ULTRA-RICH RARE METAL ORES OF THE TOMTOR COMPLEX AND PROBLEM OF THEIR GENESIS [PDF]
Минералогия, 2019 Main genetic models of the formation of ultra-rich rare metal ores of the Tomtor deposit (Yakutia) are compared on the basis of their structural-textural features, mineral composition, and geologic setting: 1) reducing epigenesis of laterite weathering ...
A.V. Lapin, A.V. Tolstov, I.M. Kulikova
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Calcium isotopic evidence for the mantle sources of carbonatites. [PDF]
Sci Adv, 2020 International audienceThe origin of carbonatites-igneous rocks with more than 50% of carbonate minerals-and whether they originate from a primary mantle source or from recycling of surface materials are still debated.
Amsellem E +6 more
europepmc +2 more sources
Geology, petrography and mineralogy of explosive breccias of Sallanlatva, Kola Region
Vestnik MGTU, 2021 The Sallanlatva massif belongs to the group of Paleozoic alkaline-ultrabasic complexes wide spread in the Kola Region (the northwestern part of the Fennoscandian Shield).
Sidorov M. Yu. +2 more
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Petrogenetic processes in the ultramafic, alkaline and carbonatitic magmatism in the Kola Alkaline Province: a review [PDF]
, 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, Elena +9 more
core +1 more source
A UNIQUE ORE LOCALITY OF POLYAKOVITE-(Ce) IN THE ILMENY MOUNTAINS, SOUTH URALS – NEW FINDS [PDF]
Минералогия, 2020 A large crystal of the rarest mineral polyakovite was discovered in 2019 in the carbonatitespegmatites of pit № 97 of the Ilmeny Mountains. Bodies of carbonatites, glimmerites, glimmeritespegmatites and carbonatite-pegmatites are located within a small ...
V.A. Popov +2 more
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Геодинамика и тектонофизика, 2022 The Burpala massif located in the Northern Baikal region contains ore-bearing pegmatites, carbonatites and apatite-fluorite rocks with Zr-Nb-REE-rare-metal mineralization.
I. A. Sotnikova +2 more
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Origin of heavy rare earth element enrichment in carbonatites [PDF]
, 2023 Heavy rare earth elements (HREE) are currently in high demand for use in high technology, renewable energy and low-carbon transport, but they are the least abundant in nature.
Taotao, Liu +6 more
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Carbonatite shows on the quartz deposits “Vein 175” (Ufalei block, the Southern Urals)
Литосфера, 2017 The subject of the study are manifestations of carbonatites in the quartz deposit “Vein № 175” - the largest deposit of granular quartz of Ufalei block in the Southern Urals.
Larisa Y. Kabanova +3 more
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BENARD CELLS – A POSSIBLE MECHANISM OF THE FORMATION OF SUBAQUATIC AND SUBFLUIDIC STALACTITES [PDF]
Минералогия, 2023 The mechanism of formation of stalactites in gravity field of the Earth during their formation in air and subaquatic and subfluidic (magmatic) systems is considered.
V.A. Popov, M.V. Tsyganko
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