Results 11 to 20 of about 5,424 (219)

MINERALOGICAL AND GEOCHEMICAL FEATURES OF APATITE-FLUORITE ROCKS OF THE BURPALA MASSIF IN THE NORTHERN BAIKAL REGION

open access: yesГеодинамика 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
doaj   +1 more source

Carbonatites from the Southern Brazilian platform: I

open access: yesOpen Geosciences, 2020
We present a comprehensive overview of the geochemical characteristics and evolution of the carbonatites from the southern Brazilian Platform (Paraná Basin).
Speziale Sergio   +5 more
doaj   +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

BENARD CELLS – A POSSIBLE MECHANISM OF THE FORMATION OF SUBAQUATIC AND SUBFLUIDIC STALACTITES [PDF]

open access: yesМинералогия, 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
doaj   +1 more source

Geology, petrography and mineralogy of explosive breccias of Sallanlatva, Kola Region

open access: yesVestnik 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
doaj   +1 more source

MINERAL ASSEMBLAGES OF THE SHISHIM MINE IN THE SOUTHERN URALS [PDF]

open access: yesМинералогия, 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
doaj   +1 more source

Carbonatite shows on the quartz deposits “Vein 175” (Ufalei block, the Southern Urals)

open access: yesЛитосфера, 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
doaj   +1 more source

Typomorphic characteristics of apatite morphology of carbonate-bearing variations of complex ores in the context of Kovdor deposit [PDF]

open access: yes, 2019
Purpose. A comprehensive analysis of apatite morphology in carbonate-bearing variations of complex ores in the context of Kovdor deposit as an important typomorphic characteristic of a mineral being of high genetic and applied informativeness.
Tikhlivets, S, Trunin, O
core   +1 more source

Long-term memory of subduction processes in the lithospheric mantle: evidence from the geochemistry of basic dykes in the Gardar Province of South Greenland [PDF]

open access: yes, 2002
The rift-related magmas of the Proterozoic Gardar Igneous Province were emplaced across the contact between the South Greenland Archaean craton and the Palaeoproterozoic Ketilidian mobile belt.
Ellam, R.M.   +2 more
core   +2 more sources

Carbonatitic Lavas [PDF]

open access: yesNature, 1962
Recently, von Knorring and du Bois described a vesicular lava of high carbonate content from western Uganda which shows close geochemical affinities with intrusive carbonatites. They stated: "It must be emphasized that the lavas examined are fresh and unaltered and that the carbonated nature cannot be attributed to alteration after solidification ...
Wyllie, P. J., Tuttle, O. F.
openaire   +2 more sources

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