Cathodoluminescence, micro thermometry and laser raman spectroscopy studies on hydrothermal quartz in Latala deposit, Central Iran

Autor: Padyar, Fariba, Rahgoshay, M., Alirezaei, S., Tarantola, Alexandre, Vanderhaeghe, Olivier, Caumon, Marie-Camille
Přispěvatelé: Faculty of Earth Sciences, Shahid Beheshti University, Shahid Beheshti University, GeoRessources, Centre National de la Recherche Scientifique (CNRS)-Université de Lorraine (UL)-Centre de recherches sur la géologie des matières premières minérales et énergétiques (CREGU)-Institut national des sciences de l'Univers (INSU - CNRS), Géosciences Environnement Toulouse (GET), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD), Institut national des sciences de l'Univers (INSU - CNRS)-Centre de recherches sur la géologie des matières premières minérales et énergétiques (CREGU)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)
Jazyk: perština
Rok vydání: 2017
Předmět:
Zdroj: Geosciences
Geosciences, Geological Survey of Iran, 2017, 26 (102), pp.39-52
Geosciences, 2017, 26 (102), pp.39-52. ⟨10.22071/gsj.2017.44072⟩
ISSN: 1023-7429
DOI: 10.22071/gsj.2017.44072⟩
Popis: National audience; The Latala base and precious metals deposit is hosted by quartz veins, associated with a porphyry pluton intruded into a Cenozoic volcanic sequence. Euhedral quartz with sulfide mineralization such as pyrite, chalcopyrite, galena and sphalerite, with minor sulfosalts occurs in these veins as open space fillings and minor replacement bodies. Progressive growth of quartz crystals is evidenced by their texture revealed by cathodoluminescence imaging. The analysis of fluid inclusions indicate a decreasing homogenization temperature from 350°C in the core to 135°C along the edge of the quartz crystals with overgrowths. The presence of CO2 vapor suggested by the thermometric analysis is confirmed by Raman spectrometry. The solid phases in fluid inclusions identified as phyllosilicates, presumably muscovite and illite, chlorite, quartz and carbonate-mineral such as (Natrocarbonate, Dawsonite) by petrography and Raman spectrometry. Solid phase of halite were identified in two fluid inclusions. The homogenization temperature and salinity varies between 131 to 380 °C and 0.17 to 7.7 wt.% NaCl eq respectively. The properties of fluid inclusions corresponds to a magmatic hydrothermal fluid circulating from depth to shallower environments. The sulfur isotopic composition for galena, sphalerite, chalcopyrite and pyrite varies between -9.8 and -1‰, which correspond to values of magmatic sulfur. The δ34S values from +1.8 to -9.2‰ are in the range of hydrothermal fluids. Fluid inclusions features show a magmatic hydrothermal source which transported magmatic fluid and vapor from the depth through fractures to shallow environment. It suggests that magmatic water mixing with meteoric water was responsible for transportation of metals in Latala. Epithermal mineral precipitation during boiling, mixing and water-rock interaction formed hydrothermal quartz and sulfide mineralization. The available evidence suggests that the hydrothermal fluids changed from magmatic to epithermal in the region.
Databáze: OpenAIRE
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