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, E. +4 more
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Enrichment of heavy REE and Th in carbonatite-derived fenite breccia
Geological Magazine, 2021 Enrichment of the heavy rare earth elements (HREE) in carbonatites is rare as carbonatite petrogenesis favours the light (L)REE. We describe HREE enrichment in fenitized phonolite breccia, focusing on small satellite occurrences 1–2 km from the Songwe ...
S. Broom-Fendley +7 more
semanticscholar +1 more source
Alkaline lamprophyres from the Sokli complex, northern Finland [PDF]
Bulletin of the Geological Society of Finland, 1978 Alkaline lamprophyric dykes in the Sokli carbonatite complex closely resemble kimberlites in mineralogical and chemical composition. Mineralogically, they differ from kimberlites by the presence of high-manganese ilmenite and richterite, and the absence ...
H. Vartiainen, P. Kresten, Y. Kafkas
doaj +1 more source
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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MINERAL ASSEMBLAGES OF THE SHISHIM MINE IN THE SOUTHERN URALS [PDF]
Минералогия, 2023 Mineralogy and petrography of complex rocks in area of the Shishim mine in the South Urals is studied. Various skarn assemblages with dominant pyroxene, garnet, vesuvianite, monticellite, chlorite and epidote are developed after gabbroids and granitoids.
V.A. Popov, M.A. Rassomakhin
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Petrology and geochemistry of selected nepheline syenites from Malawi and their potential as alternative potash sources [PDF]
, 2020 The Sub Saharan Africa agricultural sector is one of the most disadvantaged regions, partly due to high fertiliser import costs from the northern hemisphere.
Chiwona, Annock +3 more
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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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Magnetite in Sokli carbonatite massif and in Tulppio olivinite [PDF]
Bulletin of the Geological Society of Finland, 1981 Occurrence, ilmenite exsolutions and composition of magnetite in the carbonatite massif of Sokli and in the olivinite of Tulppio have been studied. In the carbonatite massif, magnetite of magmatic carbonatites is hypidio-idiomorphic, contains only very ...
K. Heinänen, H. Vartiainen
doaj +1 more source
Optimization of Acid Fracturing Process for Carbonate Reservoirs in Daniudi Gas Field
Energies, 2022 The Daniudi gas field is located in the Ordos Basin’s northern section of the Yishan slope. The intertidal–subtidal depositional environment dominates the lithology of the Ma55 sub-member, resulting in a stable, thick-layered dark gray–gray–black ...
Yongchun Zhang +5 more
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The lithospheric mantle and lower crust-mantle relationships under Scotland: a xenolithic perspective [PDF]
, 2011 In the British Isles the majority of volcanic rocks containing upper mantle and lower crustal xenoliths occur in Scotland. Most of the occurrences are of Carboniferous–Permian age.
Arai +17 more
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