Gold-Silver Mineralization in the El Salvador Region, Northern Chile

1989 ◽  
pp. 208-217 ◽  
Keyword(s):  
El Salvador ◽  
Northern Chile ◽  
Gold Silver ◽  
Silver Mineralization

scholarly journals О геологическом и изотопном возрасте золоторудных месторождений на примере золото-серебряного месторождения Кубака (Северо-Восток России)

2021 ◽  
pp. 3-12
Author(s):  
V. A. Stepanov ◽  
Keyword(s):  
Gold Mineralization ◽  
Early Carboniferous ◽  
North East ◽  
The North ◽  
Ore Bodies ◽  
Geological Age ◽  
Gold Silver ◽  
Devonian Age ◽  
Isotope Dating ◽  
Silver Mineralization

Information on the geological and isotopic age of the Kubaka gold-silver deposit in the Omolon middle massif in the North-East of Russia is presented. It has been established that the Kubaka deposit geological age lies in between the Late Devonian age of the Kedon series volcanites, containing the gold-silver mineralization, and the Early Carboniferous age of the Korbinsky suite terrigenous rocks, overlapping the volcanites and the mineralization. The post-ore nature of the Omolon complex dykes, which produce no significant impact on the distribution of gold mineralization in ore bodies, is shown. According to isotope dating, the following stages of the Kubaka deposit formation are distinguished: the accumulation of the Kubaka suite tuffs (369 Ma); the introduction of subvolcanic intrusions (344 and 337 Ma); the formation of ore metasomatites (335±5 Ma); the formation of gold-silver mineralization (330 and 334 - 324 Ma); the introduction of post-ore dikes (179±8 - 176±10 Ma).

THE CASPOSO GOLD-SILVER DEPOSIT: EVIDENCE FOR PERMO-TRIASSIC LOW-SULFIDATION EPITHERMAL MINERALIZATION IN THE CORDILLERA FRONTAL, SAN JUAN PROVINCE, ARGENTINA

2020 ◽  
Author(s):  
S. Grignola ◽  
S. Hagemann ◽  
A.S. Fogliata ◽  
J. Miller ◽  
F. Jourdan ◽  
...  
Keyword(s):  
Lower Triassic ◽  
The Andes ◽  
Vein Formation ◽  
Epithermal Mineralization ◽  
Lithostratigraphic Units ◽  
Gold Silver ◽  
Felsic Dikes ◽  
Host Rocks ◽  
Low Sulfidation ◽  
Silver Mineralization

Abstract New geochronological data provide evidence for Permo-Triassic low-sulfidation epithermal gold-silver mineralization in the Cordillera Frontal, Argentina. The U-Pb sensitive high-resolution ion microprobe (SHRIMP) analyses on zircons and titanite gave the following results: (1) andesite and rhyolite volcanic host rocks of the Casposo Au-Ag deposit yielded a range of ages between 267.1 ± 0.7 and 241.7 ± 2.2 Ma; (2) two composite plutons located near Casposo yielded ages of 268.2 ± 1.5 and 265.1 ± 1.5 Ma for the Colorado syenogranite-granite pluton and 266.6 ± 1.4 and 254.0 ± 2.4 Ma for the Casposo granodiorite-tonalite pluton; (3) a trachyan-desite dike emplaced at 265.7 ± 1.2 Ma that is crosscut by mineralized quartz-adularia-calcite-gold veins in the Kamila East area; (4) felsite intrusions, interpreted to be temporally related to the emplacement of mineralized veins at 261.1 ± 3.5 Ma; and (5) composite rhyolite/andesite dikes that crosscut all other lithostratigraphic units and mineralized veins at 238.4 ± 1.6 Ma. The 40Ar/39Ar dates on hydrothermal adularia within quartz-adularia-calcite-gold veins of the Casposo deposit revealed at least three, likely discreet, hydrothermal fluid pulses and associated periods of vein formation during extensional events between 280–274, 262–258, and 250–246 Ma. Relative and absolute timing of volcanic host rocks, plutons, postmineralization felsic dikes, and gold-bearing veins of the Casposo epithermal vein system suggest the presence of significant Permian (Cisuralian)-Lower Triassic low-sulfidation epithermal-style gold-silver mineralization at the eastern flank of the Cordillera Principal in Argentina. The existence of this epithermal Au-Ag system opens the potential for a significant magmatic-hydrothermal system in a part of the Andes that previously was considered to be of low prospectivity.

Geochronology of the Sleeper Deposit, Humboldt County, Nevada; epithermal gold-silver mineralization following emplacement of a silicic flow-dome complex

1993 ◽  
Vol 88 (2) ◽  
pp. 317-327 ◽  
Author(s):  
James E. Conrad ◽  
Edwin H. McKee ◽  
James J. Rytuba ◽  
J. Thomas Nash ◽  
William C. Utterback
Keyword(s):  
Epithermal Gold ◽  
Humboldt County ◽  
Gold Silver ◽  
Silver Mineralization

Deep structure of the Kayemraveem ore district (Chukotka) and features of epithermal gold-silver mineralization

2008 ◽  
Vol 421 (1) ◽  
pp. 755-759 ◽  
Author(s):  
A. A. Sidorov ◽  
Yu. Ya. Vashchilov ◽  
A. V. Volkov ◽  
V. F. Belyi
Keyword(s):  
Deep Structure ◽  
Epithermal Gold ◽  
Gold Silver ◽  
Silver Mineralization ◽  
Ore District

The 40Ar/39Ar age of the epithermal gold-silver mineralization of Asachinskoe Deposit, southern Kamchatka

2007 ◽  
Vol 1 (6) ◽  
pp. 405-409 ◽  
Author(s):  
A. S. Lapukhov ◽  
B. V. Guzman ◽  
V. A. Gorev ◽  
E. P. Solotchina ◽  
A. V. Travin
Keyword(s):  
Epithermal Gold ◽  
Gold Silver ◽  
Silver Mineralization
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