Acta Geologica Sinica, ( ISI ), Volume (92), No (3), Year (2018-6) , Pages (1139-1156)

Title : ( Mineralogy, Geochemistry, Fluid Inclusion and Oxygen Isotope Investigations of Epithermal Cu ± Ag Veins of the Khur Area, Lut Block, Eastern Iran )

Authors: maryam javidi , Mohammad Hassan Karimpour , Khosrow Ebrahimi Nasrabadi , Mohmmad Reza Heidarian Shahri , Azadeh Malekzadeh Shafaroudi ,

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Abstract

The Khur metallogenic district is located in the volcanic–plutonic belt in the central Lut Block (central eastern Iran). Mineralization occurs in Middle Eocene andesitic tuff and along the four main vein systems trending northwest–southeast (Shurk, Mir-e-Khash, Shikasteh Sabz and Ghar-e-Kaftar veins). Microscopic studies reveal that the veins contain bornite, chalcocite, pyrite, tennantite together with minor sphalerite and chalcopyrite as hypogene minerals and chalcocite, digenite, covellite, valleriite, malachite, azurite, atacamite, hematite, and goethite as supergene minerals. The orebodies are accompanied by narrow but intensely developed wall rock alterations of argillization, carbonatization and silicification. Copper content reaches to 6.5, 2.4, 4.2 and 5 % in Mir-e-Khash, Shikasteh Sabz, Ghar-e-Kaftar and Shurk, respectively. Microthermometric measurements of quartz- and calcite-hosted, fluid inclusions indicate that the mineralization might be derived of a moderately saline hydrothermal fluid at temperature between 175˚-316°C. Calculated δ18O values of water in equilibrium with quartz and calcite for Khur veins suggest that the fluid might have had a magmatic source, but the 18O-depleted was developed by mixing with meteoric water. Copper deposition in Khur veins is believed to have been largely caused by mixing, although wall rock reactions may also have occurred. The Khur veins are classified as volcanic-subvolcanic hydrothermal-related vein deposit.

Keywords

, Fluid inclusion, Oxygen isotopes, Khur veins, Lut Block, Iran.
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@article{paperid:1062149,
author = {Javidi, Maryam and Karimpour, Mohammad Hassan and Ebrahimi Nasrabadi, Khosrow and Heidarian Shahri, Mohmmad Reza and Malekzadeh Shafaroudi, Azadeh},
title = {Mineralogy, Geochemistry, Fluid Inclusion and Oxygen Isotope Investigations of Epithermal Cu ± Ag Veins of the Khur Area, Lut Block, Eastern Iran},
journal = {Acta Geologica Sinica},
year = {2018},
volume = {92},
number = {3},
month = {June},
issn = {1000-9515},
pages = {1139--1156},
numpages = {17},
keywords = {Fluid inclusion; Oxygen isotopes; Khur veins; Lut Block; Iran.},
}

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%0 Journal Article
%T Mineralogy, Geochemistry, Fluid Inclusion and Oxygen Isotope Investigations of Epithermal Cu ± Ag Veins of the Khur Area, Lut Block, Eastern Iran
%A Javidi, Maryam
%A Karimpour, Mohammad Hassan
%A Ebrahimi Nasrabadi, Khosrow
%A Heidarian Shahri, Mohmmad Reza
%A Malekzadeh Shafaroudi, Azadeh
%J Acta Geologica Sinica
%@ 1000-9515
%D 2018

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