Results 11 to 20 of about 220,175 (263)

Si- versus Mg-metasomatism at the crust–mantle interface: insights from experiments, natural observations and geochemical modeling

open access: yesProgress 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   +2 more sources

Progressive carbonation and Ca-metasomatism of serpentinized ultramafic rocks: insights from natural occurrences and hydrothermal experiments [PDF]

open access: hybridContributions to Mineralogy and Petrology, 2023
Hydration, carbonation, and related metasomatism of mantle peridotite play a significant role in the global geochemical cycle. In this study, we combined an analysis of carbonated serpentinite with hydrothermal experiments on carbonation and Ca ...
Nomuulin Amarbayar   +8 more
openalex   +2 more sources

Experimental study on mineral processing of shallow oxidation ore in a hydrothermal metasamatic sulfide gold mine [PDF]

open access: yesE3S 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   +4 more
doaj   +2 more sources

Major, Trace, and Rare-Earth Element Geochemistry of Nb-V Rich Andradite-Schorlomite-Morimotoite Garnet from Ambadungar-Saidivasan Alkaline Carbonatite Complex, India: Implication for the Role of Hydrothermal Fluid-Induced Metasomatism [PDF]

open access: goldMinerals, 2021
In situ major, trace and rare-earth element composition of Ti-rich garnets from Ambadungar-Saidivasan alkaline carbonatite complex (ASACC) are presented to constrain its likely genesis.
Amiya K. Samal   +2 more
openalex   +2 more sources

Regional-scale Metasomatism in the Fortescue Group Volcanics, Hamersley Basin, Western Australia: Implications for Hydrothermal Ore Systems [PDF]

open access: yesJournal of Petrology, 2014
Mafic to intermediate volcanic rocks of the Fortescue Group form the lowermost stratigraphic unit of the 100 000 km2 Hamersley Basin on the southern margin of the Archaean Pilbara Craton, Western Australia. These represent one of the oldest (2·8–2·7 Ga) known examples of a continental flood basalt sequence.
Raymond E. Smith   +3 more
openaire   +3 more sources

Hydrothermal phenomena in Risovaca cave and within Vencac massif Shumadies, Serbia [PDF]

open access: yesZbornik 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
doaj   +1 more source

Hiekkapohja hydrothermal system – ore mineral, lithogeochemical and paleomagnetic evidence from the Paleoproterozoic Central Finland Granitoid Complex [PDF]

open access: yesBulletin 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
doaj   +1 more source

Hydrothermal and Metasomatic Kaolin Resource Estimation in the Quang Ninh area, Northeastern Vietnam

open access: yesThe Iraqi Geological Journal, 2021
In northeastern Vietnam, hydrothermal‐metasomatic kaolinite-pyrophyllite from the secondary quartzite origin has been found in many places, including Pin Ho, Ban Ngai, Khe Khoai, Pec Sec Leng, Tan Mai ore occurrences, etc. They are exploited together with pyrophyllite, alunite, and high‐alumina quartzite as a byproduct.
Khuong The Hung, Le Do Tri
openaire   +3 more sources

SPESSARTINE-GROSSULAR GARNETS IN METAVOLCANICS FROM THE CENTRAL BUNDELKHAND GREENSTONE COMPLEX OF THE BUNDELKHAND CRATON, INDIAN SHIELD: PARAGENESES, ZONING, STRINGERS, AND INCLUSIONS

open access: yesTransactions 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
doaj   +1 more source

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