Results 11 to 20 of about 370 (183)

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

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

REE-Y-Ti-Th mineralization in the albite bearing metasomatite and metasomatized rhyolite hosted in Choghart magnetite-apatite deposit, Central Iran: Interplay of evaporitic brines, hydrothermal-magmatic fluids

Journal of Economic Geology, 2023
Macroscopic, microscopic and geochemical studies carried out on albite-bearing metasomatites and metasomatic rhyolites hosting the magnetite-apatite deposit of Chogharat indicate the presence of three generations of albite with different concentrations ...
Kiamars Hosseini, Roghayeh Zabihi Khargh, Mohammad Hossein Moradian Bafghi   +2 more
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Listvenites: new insights of a hydrothermal system fossilized in Cerro Matoso peridotites, Montelíbano, Córdoba Department, Colombia

Boletín Geológico, 2020
The products of metasomatic alteration (e.g., carbonation) of peridotites are called listvenites. Based on a description of the outcrops in the laterite deposit at Cerro Matoso located in the NW of Colombia, the mineralogical composition confirmed by ...
Andrés Castrillón, Javier Guerrero
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Gold, platinum and palladium enrichments in arcs: role of mantle wedge, arc crust and halogen-rich slab fluids [PDF]

E3S Web of Conferences, 2019
Arc-related magmas are frequently enriched in Au, Pt and Pd in respect to MORB and OIB igneous suites. Magmatic arcs commonly host large-scale hydrothermal Au and Au-Cu and PGE mineralization related to young volcanic systems and zoned ultramafic ...
Kepezhinskas Pavel, Kepezhinskas Nikita, Berdnikov Nikolai   +2 more
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Si- versus Mg-metasomatism at the crust–mantle interface: insights from experiments, natural observations and geochemical modeling

Progress in Earth and Planetary Science, 2023
The slab–mantle interface in subduction zones is one of the geological boundaries with the most significant chemical potential gradients, which leads to fluid-mediated metasomatic reactions and chemical transport.
Atsushi Okamoto, Ryosuke Oyanagi
doaj   +1 more source

Relation of alkali-metasomatism and Ti-REE-U (Th) mineralization in the Saghand mining district, Central Iran

Journal of Economic Geology, 2019
Introduction The Saghand mining district is a part of Bafq-Saghand metallogenic zone in the Central Iranian geostructural zone which is located in northeast of city of Yazd.
Saleh Deymar, Mehrdad Behzadi, Mohammad Yazdi, Mohammad Reza Rezvanianzadeh   +3 more
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Lithogeochemistry and zircon U-Pb geochronology of the Granjeiro Complex and associated units, Curral Novo do Piauí, SW-Borborema Province, Brazil: implications for Archean to Paleoproterozoic crustal evolution

Journal of the Geological Survey of Brazil, 2023
The Curral Novo Iron District, located in the center-east of the state of Piauí, is hosted in the Granjeiro Complex in its southwestern section, located in the Rio Piranhas-Seridó Domain, northern subprovince of Borborema Province. In this district, the
José Alberto Rodrigues do Vale, Lena Virginia Soares Monteiro, Camila Franco Basto, Vladimir Cruz de Medeiros, Douglas Almeida Silveira, Evilarde Carvalho Uchôa Filho, Nilo Costa Pedrosa Junior, Joseneusa Rodrigues Brilhante, Ticiano José Saraiva dos Santos   +8 more
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Spatial-temporal distribution, metallogenic mechanisms and genetic types of nephrite jade deposits in China

Frontiers in Earth Science, 2023
The nephrite jade deposits of different tectonic units in China exert significant commercial quality, which have attracted wide attention. However, these deposits have not been systematically summarized to date.
Cun Zhang, Fan Yang, Xiaoyan Yu, Jinhai Liu, Emmanuel John M. Carranza, Jie Chi, Peng Zhang   +6 more
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Relationship of copper-molybdenum and gold minering with magmatism [PDF]

E3S Web of Conferences
In the investigated deposits, a combination of skarn and hydrothermal mineralization has been identified. Specific facies within intrusive complexes align with distinct postmagmatic formations.
Zhonibekov Bobur, Tulyaganova Nargiza, Adilkhanov Karim, Adilov Bakhram, Abdusamatova Dilafruz   +4 more
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Experimental study on mineral processing of shallow oxidation ore in a hydrothermal metasamatic sulfide gold mine [PDF]

E3S Web of Conferences
The ore produced by a gold mine in Fujian province belongs to hydrothermal metasomatism sulfide type gold (silver) ore, and the shallow oxidized ore of the deposit has a gold grade of 0.91g/t. In order to understand the selectability of this oxidized ore,
Qin Xiangwei, Li Guangsheng, Zhu Xingfu, Zhang Zhiming, Cai Mingming   +4 more
doaj   +1 more source