Next Article in Journal
Editorial for Special Issue “Fluid Inclusions: Study Methods, Applications, and Case Histories”
Next Article in Special Issue
Numerical Modeling of REE Fractionation Patterns in Fluorapatite from the Olympic Dam Deposit (South Australia)
Previous Article in Journal
What the Diffuse Layer (DL) Reveals in Non-Linear SFG Spectroscopy
Previous Article in Special Issue
Stability of AuCl2 from 25 to 1000 °C at Pressures to 5000 bar and Consequences for Hydrothermal Gold Mobilization
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessArticle
Minerals 2018, 8(7), 306; https://doi.org/10.3390/min8070306

Physicochemical Model of Formation of Gold-Bearing Magnetite-Chlorite-Carbonate Rocks at the Karabash Ultramafic Massif (Southern Urals, Russia)

1
A.N. Zavaritsky Institute of Geology and Geochemistry, Ural Branch of Russian Academy of Sciences, Vonsovskogo str., 15, Ekaterinburg 620016, Russia
2
A.P. Vinogradov Institute of Geochemistry, Siberian Branch of Russian Academy of Sciences, Favorskogo str., 1a, Irkutsk 664033, Russia
3
V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, Akademika Koptyuga pr., 3, Novosibirsk 630090, Russia
4
Department of Geology and Geophysics, Novosibirsk State University, Pirogova str., 2, Novosibirsk 630090, Russia
5
Institute of Experimental Mineralogy, Russian Academy of Sciences, Chernogolovka, Moscow Region 142432, Russia
*
Author to whom correspondence should be addressed.
Received: 8 June 2018 / Revised: 13 July 2018 / Accepted: 17 July 2018 / Published: 20 July 2018
Full-Text   |   PDF [5703 KB, uploaded 23 July 2018]   |  

Abstract

We present a physicochemical model for the formation of magnetite-chlorite-carbonate rocks with copper gold in the Karabash ultramafic massif in the Southern Urals, Russia. The model was constructed based on the formation geotectonics of the Karabash massif, features of spatial distribution of metasomatically altered rocks in their central part, geochemical characteristics and mineral composition of altered ultramafic rocks, data on the pressure and temperature conditions of formation, and composition of the ore-forming fluids. Magnetite-chlorite-carbonate rocks were formed by the hydrothermal filling of the free space, whereas chloritolites were formed by the metasomatism of the serpentinites. As the source of the petrogenic and ore components, we considered rocks (serpentinites, gabbro, and limestones), deep magmatogenic fluids, probably mixed with metamorphogenic fluids released during dehydration and deserpentinization of rocks in the lower crust, and meteoric waters. The model supports the involvement of sodium chloride-carbon dioxide fluids extracting ore components (Au, Ag, and Cu) from deep-seated rocks and characterized by the ratio of ore elements corresponding to Clarke values in ultramafic rocks. The model calculations show that copper gold can also be deposited during serpentinization of deep-seated olivine-rich rocks and ore fluids raised by the tectonic flow to a higher hypsometric level. The results of our research allow predicting copper gold-rich ore occurrences in ultramafic massifs. View Full-Text
Keywords: Karabash ultramafic massif; magnetite-chlorite-carbonate rocks; chloritolites; Au-Cu mineralization; copper gold; thermodynamic modeling Karabash ultramafic massif; magnetite-chlorite-carbonate rocks; chloritolites; Au-Cu mineralization; copper gold; thermodynamic modeling
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Murzin, V.; Chudnenko, K.; Palyanova, G.; Kissin, A.; Varlamov, D. Physicochemical Model of Formation of Gold-Bearing Magnetite-Chlorite-Carbonate Rocks at the Karabash Ultramafic Massif (Southern Urals, Russia). Minerals 2018, 8, 306.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Minerals EISSN 2075-163X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top