scholarly journals Physic-chemical conditions of gold-bearing magnetite-chlorite-carbonate roks' formation of the Karabash ultramafic massif (the Southern Urals)

LITOSFERA ◽  
2017 ◽  
Vol 17 (6) ◽  
pp. 110-117 ◽  
Author(s):  
Valerii V. Murzin ◽  
◽  
Svetlana N. Shanina ◽  
Keyword(s):  
Southern Urals ◽  
The Southern Urals ◽  
Ultramafic Massif ◽  
Chemical Conditions ◽  
Gold Bearing

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

Minerals ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 306 ◽  
Author(s):  
Valery Murzin ◽  
Konstantin Chudnenko ◽  
Galina Palyanova ◽  
Aleksandr Kissin ◽  
Dmitry Varlamov
Keyword(s):  
Carbon Dioxide ◽  
Carbonate Rocks ◽  
Southern Urals ◽  
Ultramafic Rocks ◽  
Physicochemical Model ◽  
The Southern Urals ◽  
Model Calculations ◽  
Ultramafic Massif ◽  
Copper Gold ◽  
Gold Bearing

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.

scholarly journals GOLD-JASPEROID MINERALIZATION IN ZONE OF THE SHARTYMSKIY FAULT (SOUTH URALS)

2020 ◽  
Vol 19 (3) ◽  
pp. 275-281
Author(s):  
P. V. Kazakov ◽  
Keyword(s):  
Southern Urals ◽  
South Urals ◽  
Weathering Crust ◽  
The Southern Urals ◽  
Lower Carboniferous ◽  
Stage Of Development ◽  
Deposit Type ◽  
Economic Concentration ◽  
Carboniferous Limestone ◽  
Gold Bearing

The Shartymskiy Graben was formed at zone of the Shartymskiy Fault in the late collision stage of development of the Southern Urals on the joint of the Western and Eastern Magnitogorsk sub-zone in conditions of variable compression and stretching, and was made with the Lower Carboniferous limestone. Occurrences of gold-bearing metasomatites (jasperoids, sericite-chlorite-carbonate-quartz, sericite-quartz) have been established in the precontact zones of carbonates, gabbro-dolerites, diorites dykes, and small intrusions of sub-alkaline leuсograniteporphirs of the Shartymskiy massif. Mediated connection with them of gold sprouts is established. The gold economic concentration of the Vorontsovskiy deposit type is expected on the certain sections of metasomatites of jasperoid association and their weathering crust.

The first data on possible Mezozoic magmatism within the Western slope of the Southern Urals

2018 ◽  
pp. 24-34
Author(s):  
A. O. Khotylev ◽  
N. B. Devisheva ◽  
Al. V. Tevelev ◽  
V. M. Moseichuk
Keyword(s):  
Southern Urals ◽  
Western Slope ◽  
Isotopic Age ◽  
The Southern Urals ◽  
Early Proterozoic ◽  
Carbonate Formations ◽  
Two Bodies

Within the Western slope of the Southern Urals, there are plenty of basite dyke complexes of Riphean to Vendian among Precambrian terrigenous-carbonate formations. In metamorphic formations of the Taratash complex (Archean to Early Proterozoic, the northern closure of the Bashkirian meganticlinorium) there was observed the andesitic dyke with isotopic age of 71±1 Ma (U-Pb SHRIMP II on zircons) and near Bakal two bodies of gabbroids with zircons of similar ages were found. These are the first evidence of possible Mezozoic magmatism in this region.

ABOUT THE PHYTOCENOTIC ROLE OF THE DARKNOUS SPECIES IN THE SOUTHERN URALS

2017 ◽  
Vol 212 (12) ◽  
pp. 48-50
Author(s):  
Ju.P. Gorichev ◽  
◽  
A.N. Davydychev ◽  
A.Yu. Kulagin ◽  
◽  
...  
Keyword(s):  
Southern Urals ◽  
The Southern Urals

Syntaxonomy of mid-successional stages of secondary forests of the central elevated part of the Southern Urals

2012 ◽  
pp. 109-134
Author(s):  
P. S. Shirokikh ◽  
A. M. Kunafin ◽  
V. B. Martynenko
Keyword(s):  
Boreal Forests ◽  
Floristic Composition ◽  
Southern Urals ◽  
Secondary Forests ◽  
Natural Forests ◽  
The Southern Urals ◽  
Active Growth ◽  
Tree Layer ◽  
Shade Tolerant Species ◽  
Successional Stages

The secondary birch and aspen forests of middle stages of succession of the central elevated part of the Southern Urals are studied. 4 subassociations, 1 community, and 7 variants in the alliances of Aconito-Piceion and Piceion excelsae are allocated. It is shown that the floristic composition of aspen and birch secondary forests in the age of 60—80 years is almost identical to the natural forests. However, a slight increase the coenotical role of light-requiring species of grasslands and hemiboreal forests in the secondary communities of the class Brachypodio-Betuletea was noticed as well as some reduction of role the shade-tolerant species of nemoral complex and species of boreal forests of the class Vaccinio-Piceetea. Dominant tree layer under the canopy of secondary series is marked by an active growth of natural tree species.

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