Scavenging and release of REE and HFSE by Na-metasomatism in magmatic-hydrothermal systems [PDF]
Fundamental Research, 2022 Exploitable or potentially exploitable deposits of critical metals, such as rare-earth (REE) and high-field-strength elements (HFSE), are commonly associated with alkaline or peralkaline igneous rocks.
Wu-Bin Yang +5 more
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Carbonatitic versus hydrothermal origin for fluorapatite REE-Th deposits: Experimental study of REE transport and crustal “antiskarn” metasomatism [PDF]
, 2018 Nolans-type ore deposits contain REE and Th mineralization hosted in fluorapatite veins. These veins intrude granulite facies rocks and are surrounded by a diopside selvage.
Michael Anenburg, John Mavrogenes
openalex +3 more sources
A new occurrence of hydrous andradite within pyroclastic rocks of the Sierra De Bahoruco, Dominican Republic [PDF]
Scientific ReportsThe titanium-bearing (up to 3.31 wt% TiO2) hydrous andradite [Ca2.98Na(0.02)K(0.01)Fe2+ (0.01)]Σ=3.02[Fe3 + 1.25Al0.45Ti0.15Fe2+ 0.07Mg0.04V3+ 0.01Mn2+ 0.01]Σ=2.98Si2.43O9.72(OH)2.28 was identified within intensely altered and weathered pyroclastic ...
Jacek Wachowiak +8 more
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Near vein metasomatism along propylitic veins in the Baksa Gneiss Complex, Pannonian Basin, Hungary [PDF]
Geologia Croatica, 2010 In many parts of the metapelitic (gneiss, mica schist) rock section of the Baksa Complex, significant wall-rock alteration is observable along the Ca-Al silicate veins, which show a di → ep ± czo →sp → ab ± kfs → chl → adu → prh → py → cal mineral ...
Krisztian Fintor +2 more
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Impact-generated hydrothermal circulation and metasomatism of the rochechouart astrobleme: mineralogy and major and trace element distribution [PDF]
, 2014 The energy released during a hypervelocity impact on Earth can generate high temperatures in the target rock. There are currently 170 known impact structures worldwide, of which over one-third contain fossil hydrothermal systems [1].
Sarah Simpson, Martin Lee, P. Lindgren
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Shiyou shiyan dizhi, 2021 Different forms of talc have been developed in the first member of Permian Maokou Formation (P2m1) in the Sichuan Basin. As a hydrothermal alteration mineral, its formation mechanism and its influence on the P2m1 reservoir need to be further explored ...
Haixia REN +6 more
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Elucidating Pathfinding Elements from the Kubi Gold Mine in Ghana [PDF]
Minerals 11, 912 (2021), 2021 X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectroscopy (EDX) are applied to investigate the properties of fine-grained concentrate on artisanal small-scale gold mining samples from the Kubi Gold Project of the Asante Gold Corporation near Dunwka-on-Offin in the Central Region of Ghana.
arxiv +1 more source
Correlating hydrothermal system dynamics and eruptive activity -- A case-study of Piton de la Fournaise volcano, La R{é}union [PDF]
Journal of Volcanology and Geothermal Research, Elsevier, 2018,
363, pp.23 - 39, 2022 Piton de la Fournaise volcano, La R{\'e}union Island, is a basaltic shield volcano which underwent an intense cycle of eruptive activity between 1998 and 2008. Self-potential and other geophysical investigations of the volcano have shown the existence of a well-established hydrothermal system within the summit cone.
arxiv +1 more source
Geochemistry, Geophysics, Geosystems, 2023 At Mid‐Ocean Ridges, hot, reduced, acidic, and metal‐rich fluids are responsible for the formation of ultramafic‐hosted seafloor massive sulfide deposits (UM‐SMSs), where mantle exhumation efficiently operates.
R. Coltat +5 more
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Hiekkapohja hydrothermal system – ore mineral, lithogeochemical and paleomagnetic evidence from the Paleoproterozoic Central Finland Granitoid Complex [PDF]
Bulletin of the Geological Society of Finland, 2023 The Paleoproterozoic Svecofennian Central Finland Granitoid Complex (CFGC) has been regarded as an area of low mineralisation potential. The Hiekkapohja area, 20km north-east of the town of Jyväskylä, host a concentration of variable metalliferous ...
Esa Heilimo +4 more
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