Ore breccias as a key to understanding the genesis of silver and gold deposits in Western Verkhoyanye
https://doi.org/10.31242/2618-9712-2019-24-2-2
Abstract
The genesis and evolution of ore breccias of the main silver and gold deposits in Western Verkhoyanye corresponding to the richest types of ores are described. The duration of the ore process and ambiguity of the modern dating of ore formation relying only on the determination of the crystallization time of igneous rocks are demonstrated by the examples of ore relationships with each other and with intrusive formations. For this purpose, during long-term field studies, a set of the most representative ore breccias was collected, photo-documented and studied. The start of ore formation at the Vertikalnoe deposit refers to the time after the crystallization of the Endybal intrusive and a cluster of dykes; it includes not less than four stages. The Kis-Kyuelskoe deposit belongs to the intra-intrusove type, its formation is associated with solidification and cracking of the roof of the diorite-granodiorite intrusive. Silver amalgams in the Khachakchanskoe deposit were formed in the faults stretching to the north-east, intersecting the folded structures. The ores of the Endybal ore mountain were deposited in a series of differently oriented cracks and interlayered zones of thrust faults. We assume that the last manifestations of activity in the zones of ore-controlling faults occurred in the Cenozoic, and the long-standing process of ore deposition in multistage breccias could take place since 102-98 million years till the beginning of the Paleogene.
Supporting agencies: The article was prepared with the financial support of research project No. 03812019-0004 of Diamond and Precious Metal Geology Institute (DPMGI) SB RAS.
About the Author
Aleksey Valentinovich Kostin
Diamond and Precious Metal Geology Institute, SB RAS
Russian Federation
Russian Federation
Kostin Aleksey Valentinovich, Doctor of Geological and Mineralogical Sciences, Head of Laboratory, Diamond and Precious Metal Geology Institute, SB RAS, 39 Lenina pr., Yakutsk, 677980, Russia, https://orcid.org/0000-0002-5778-6505, kostin@diamond.ysn.ru
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For citations:
Kostin A.V. Ore breccias as a key to understanding the genesis of silver and gold deposits in Western Verkhoyanye. Arctic and Subarctic Natural Resources. 2019;24(2):21-37. (In Russ.) https://doi.org/10.31242/2618-9712-2019-24-2-2
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