Results 1 to 10 of about 13,641 (263)

The weathering process of carbonatite: weathering time [PDF]

open access: yesPeerJ, 2023
Soil formation by rock weathering is driven by a combination of parent material, climate, organisms, topography, and time. Among these soil-forming factors, time plays a pivotal role in the weathering of carbonatite but it is a challenging factor to ...
Jin Chen   +8 more
doaj   +3 more sources

Does a carbonatite deposit influence its surrounding ecosystem? [PDF]

open access: yesFACETS, 2019
Carbonatites are unusual alkaline rocks with diverse compositions. Although previous work has characterized the effects these rocks have on soils and plants, little is known about their impacts on local ecosystems.
James M.C. Jones   +5 more
doaj   +3 more sources

Carbonatite Melts and Electrical Conductivity in the Asthenosphere [PDF]

open access: yesScience, 2008
International audienceElectrically conductive regions in Earth's mantle have been interpreted to reflect the presence of either silicate melt or water dissolved in olivine.
, Michel cha Pichavant, Bruno Scaillet
exaly   +3 more sources

Evidence for dissolution-reprecipitation of apatite and preferential LREE mobility in carbonatite-derived late-stage hydrothermal processes [PDF]

open access: yesAmerican Mineralogist, 2016
The Tundulu and Kangankunde carbonatite complexes in the Chilwa Alkaline Province, Malawi, contain late-stage, apatite-rich lithologies termed quartz-apatite rocks.
Sam Broom-Fendley, Frances Wall
exaly   +3 more sources

In situ U–Pb age determination of apatite from carbonatite and kimberlite in the Batain Basin, eastern Oman

open access: yesFrontiers in Earth Science, 2023
Northeastern Oman is characterized by carbonatite and kimberlite complexes, which are the ideal samples for studying the relationship between carbonatite and kimberlite. However, the ages of the Oman kimberlite and carbonatite complexes are still unknown,
Jing Sun   +3 more
doaj   +1 more source

Genesis of silica-rich carbonatite in the Miaoya complex, Hubei Province and its implications for REE mineralization

open access: yes地质科技通报, 2023
The Miaoya complex in Hubei Province hosts one of the most important REE deposit in China. This complex is composed of syenite, carbonatite (SiO2 < 10%), and a suite of silica-rich carbonatite (SiO2>30%).
Yinqiu Hu, Bin Wu, Qian Ren
doaj   +1 more source

Rare earth element abundances in carbonatites and fenites of the Newania complex, Rajasthan, India [PDF]

open access: yesBulletin of the Geological Society of Finland, 1989
The Newania carbonatite is intrusive into the Untala granite-gneiss of Precambrian age. An aureole of dominantly sodic fenites has been developed around the carbonatite.
S.G. Viladkar, P.B. Pawaskar
doaj   +1 more source

The carbonatites of Amba Dongar, Gujarat, India [PDF]

open access: yesBulletin of the Geological Society of Finland, 1981
The geology, petrography and major and trace element geochemistry of Amba Dongar carbonatites are described. The ring structure of Amba Dongar carbonatite-alkalic complex has a central core of basalt collared by carbonatite breccia which in turn is ...
S.G. Viladkar
doaj   +1 more source

SEQUENCE OF AILLIKITE AND CALCITE CARBONATITE FORMATION WITHIN THE BELAYA ZIMA MASSIF, EAST SIBERIA, RUSSIA

open access: yesГеодинамика и тектонофизика, 2022
The mineralogical and geochemical features, as well as the sequence of formation of aillikite and calcite carbonatite (CC) with pyrochlore are described for the massif of alkaline ultramafic carbonatite complexes Belaya Zima located in East Siberia ...
S. M. Zhmodik   +5 more
doaj   +1 more source

AGE AND GEODYNAMIC SETTINGS OF MIASKITE-PEGMATITES, CARBONATITES, AND Nb-Zr MINERALIZATION OF THE ILMENO-VISHNEVOGORSKY ALKALINE COMPLEX, SOUTH URAL (U-Pb AND Rb-Sr ISOTOPE DATA)

open access: yesГеодинамика и тектонофизика, 2022
The Ilmeno-Vishnevogorsky miaskite-phenite-carbonatite complex (IVС), located in the Urals folded region, is a representative of "linear type" carbonatite complexes, with which Nb-Zr deposits are associated.
I. L. Nedosekova   +3 more
doaj   +1 more source

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