Geochronology of Mesozoic granitoids and associated molybdenum mineralization in the western part of the Dzhugdzhur-Stanovoi superterrane

et al. 2012

Russ. J. of Pac. Geol.

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Mesozoic ore systems were responsible for the formation of numerous Au, Ag, Mo, and Pb occur rences and deposits in the North Stanovaya metallogenic zone, the largest of which are the Bamskoe, Vykhodnoe, Mogotinskoe, Dess, Nakhodka, and Apsakan deposits. The age of the hydrothermal-metaso matic processes that accompanied the mineralization is 130-122 Ma, which allows us to relate the ore for mation to the origin of the granitoids of the Tynda-Bakaran complex (138-124 Ma). The latter rocks form large intrusions united into the Stanovoi Belt in the southeastern framing of the North Asian Craton. The ore objects change in the sequence Au-Ag-Au-Mo(Au) from the south northward and are restricted to the contact zones of intrusions of the Stanovoi Belt, which were probably formed at the transform continental margin.

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Brief Geology Of the Dess Occurrencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Age of the Au-Ag mineralization and its relation to the magmatism at the Dess occurrence, North Stanovaya metallogenic zone (southeastern framing of the North-Asian Craton)

Buchko

et al. 2012

Russ. J. of Pac. Geol.

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The Berezitovoe gold-polymetallic deposit (East Siberia): mineralogy, age, and relation with magmatism

Melnikov

Russian Geology and Geophysics

et al. 2009

The Berezitovoe gold-polymetallic deposit is localized in the west of the Selenga–Stanovoi superterrane composed of a wide spectrum of Early and Late Precambrian igneous rocks and abundant Paleozoic and Mesozoic intrusive and volcanoplutonic associations. The 40Ar/39Ar ages determined for metasomatites bearing gold-polymetallic mineralization are as follows: garnet-quartz-muscovite-sericite-K-feldspathic metasomatites (129.7±3.2–127.3±4.4 Ma); muscovite-quartz-sericite metasomatites (132.0±2.9–131.3±2.3 Ma). According to the age and general scheme of evolution of the Early Cretaceous magmatism in the Selenga–Stanovoi superterrane, the metasomatites of the Berezitovoe deposit are nearly coeval to the intrusive rocks of the Amudzhikan complex (132–128 Ma). The revealed platinum potential of gold-polymetallic ores and metasomatites permits ranking the Berezitovoe deposit as a specific complex gold-polymetallic-platinum deposit, which considerably increases its commercial value.

Correlation between the ore formation processes in the Berezitovoe gold–complex-metal deposit (western part of the Selenga–Stanovoy superterrane) and the regional tectonomagmatic events

Russian Geology and Geophysics

Травин

et al. 2014

The age of the major igneous complexes in the western part of the Selenga–Stanovoy superterrane has been estimated by 40Ar/39Ar dating: trachyandesite-basalts of the Kuitun (Chichatka) complex—259.4 ± 6.2 Ma; gabbro of the Tukuringra complex—156.3 ± 4.8 Ma; granites and pegmatites of the Tukuringra complex—153.1 ± 3.8, 154.0 ± 4.4, 156.8 ± 4.0, and 151.2 ± 3.2 Ma; granodiorites, granites, and leucogranites of the Amudzhikan complex—131.7 ± 2.4, 134.5 ± 2.8, and 131.6 ± 4.2 Ma; and lamprophyre dikes—125.2 ± 2.4 and 125.2 ± 3.4 Ma. Two stages of hydrothermal ore formation process have been recognized: 132–131 and ~ 125 Ma. It is shown that the deposit formation and superposed processes follow the general regularities of the Late Mesozoic evolution of the Pacific Asia margin.