Results 11 to 20 of about 2,685 (149)

Carbonatites from the Southern Brazilian platform: I [PDF]

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   +3 more sources

Origin of alkali-rich volcanic and alkali-poor intrusive carbonatites from a common parental magma [PDF]

open access: yesScientific Reports, 2021
The discrepancy between Na-rich compositions of modern carbonatitic lavas (Oldoinyo Lengai volcano) and alkali-poor ancient carbonatites remains a topical problem in petrology.
Ivan F. Chayka   +6 more
doaj   +2 more sources

Craton-margin lithosphere drives rare earth element ore-forming carbonatite magmatism [PDF]

open access: yesNature Communications
The majority of light rare earth element (LREE) resources are derived from carbonatite-associated deposits at cratonic margins. However, the origin of ore-forming carbonatite magmas remains unclear.
Chunfei Chen   +8 more
doaj   +2 more sources

Spin Transition of Iron in Deep‐Mantle Ferromagnesite

open access: yesGeophysical Monograph Series, Page 115-125., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Jiachao Liu, Suyu Fu, Jung‐Fu Lin
wiley  

+7 more sources

Large Igneous Province Record Through Time and Implications for Secular Environmental Changes and Geological Time‐Scale Boundaries

open access: yesGeophysical Monograph Series, Page 1-26., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Richard E. Ernst   +8 more
wiley  

+4 more sources

Formation of rare earth deposits in carbonatites [PDF]

open access: yes, 2022
Carbonatites and carbonatite-related rocks are the premier source for light rare earth element (LREE) deposits. Here we outline a simplified ore formation model for LREE mineralised carbonatites, reconciling field and petrological observations with ...
S Broom-Fendley (21855821)   +2 more
core   +6 more sources

Mantle Metasomatism and REE Enrichment in the Genetic Source of the Dalucao Carbonatite Complex (Sichuan, China): Insights from Elemental Geochemistry and In-Situ Sr Isotopes of Two Calcite Types [PDF]

open access: yesLithosphere, 2023
Carbonatites possess the highest rare earth element (REE) concentrations among all magmatic rocks, yet the mechanisms governing the enrichment of REEs in carbonatites remain enigmatic.
Xiaochao Shu   +3 more
doaj   +1 more source

New Geomodels for Zambian Carbonatites [PDF]

open access: yes
As the world shifts to clean energy technologies, to reduce greenhouse gas emissions, there is increasing demand for the metals and minerals needed to produce them.
M Musialike (22000352)
core   +6 more sources

Early carbonatite magmatism at Oldoinyo Lengai volcano (Tanzania): carbonatite–silicate melt immiscibility in Lengai I melt inclusions

open access: yesComptes Rendus. Géoscience, 2021
Carbonatites are unusual C-rich alkaline magmas that have been reported throughout the geological record. Nevertheless, there is only one currently active carbonatite system on Earth: Oldoinyo Lengai stratovolcano in northern Tanzania (God’s mountain in ...
France, Lydéric   +2 more
doaj   +1 more source

NEW DATA ON MINERALOGY OF THE SUGUR COPPER DEPOSIT, SOUTH URALS [PDF]

open access: yesМинералогия, 2022
The previous and new data on minerals and mineral assemblages of the Sugur copper deposit in the Sugur Mountains of South Urals are summarized. The ores of the deposit host abundant calcite, andradite, diopside, magnetite, chromite and serpentine ...
V.A. Popov   +2 more
doaj   +1 more source

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