Results 1 to 10 of about 370 (183)
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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Reaction-driven magmatic crystallisation at the Maoniuping carbonatite [PDF]
Nature CommunicationsIgneous rocks form by solidification of magmas through cooling or volatile degassing following decompression. Expelled H2O is thought to trigger alteration around intrusions, leading to formation of metasomatic halos.
Yan Liu, Michael Anenburg
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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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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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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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Hydrothermal phenomena in Risovaca cave and within Vencac massif Shumadies, Serbia [PDF]
Zbornik Radova: Geografski institut "Jovan Cvijić", 2004 In the Risovaca cave are found, for the karst, atypical alteration in the limestones structure. Also, morphogenesis of the object can not be logically interpret. Those differences are result of hydrothermal process in initial phase of karstic cycle.
Wrzak-Tomić Janina, Manecki Andrzej
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Transactions of the Karelian Research Centre of the Russian Academy of Sciences, 2020 Archean metavolcanics from the Mauranipur Structure of the Central Bundelkhand greenstone complex have been subjected to three stages of metamorphism and metasomatism: 1) amphibolite-facies metamorphism (~2.7 Ga), 2) retrograde metamorphism and ...
Олег Станиславович Сибелев +1 more
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Geochemical characteristics of the garnets from the Laodonggou gold deposit, Beishan, Inner Mongolia
Dizhi lixue xuebao, 2023 The Laodonggou gold deposit is a medium-sized gold deposit discovered in the eastern section of the Beishan metallogenic belt. It resulted from the superposition of multi-phase and multi-stage metallogenesis.
TANG Weidong +8 more
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Bulletin of the Mineral Research and Exploration, 2022 Rare Earth Elements (REE) + Niobium (Nb) + Uranium (U) + Zircon (Zr) + Lithium (Li) formations are investigated which are related with alkaline Upper Cretaceous - Lower Paleocene Kuluncak Syenitoid that settled by cutting the Kuluncak ophiolite in the ...
Okan Pulat +2 more
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