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Title: TYPOCHEMICAL AND MORPHOLOGICAL FEATURES OF NATIVE GOLD FROM DEPOSITS OF ALDAN-STANOVOY SHIELD (SOUTH-EASTERN PART OF SIBERIAN PLATFORM)
TYPOCHEMICAL AND MORPHOLOGICAL FEATURES OF NATIVE GOLD FROM DEPOSITS OF ALDAN-STANOVOY SHIELD (SOUTH-EASTERN PART OF SIBERIAN PLATFORM)

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A. Zhuravlev;A. Okrugin;A. Kravchenko
10.5593/sgem2020/1.1/s01.045
1314-2704
978-619-7603-04-0
English
20
1.1
Geology
The Tyrkanda gold-bearing region is located in the South-East part of Yakutia within the Aldan Precambrian granulite-gneiss region and the Tyrkanda area of Mesozoic magmatism and gold mineralization of Aldan-Stanovoy shield. Despite the long history of development of gold placer deposits in the area, primary sources for some of them have not yet been founded and are not characterized. The typochemical and morphological features of native gold from placers of Tyrkanda gold-bearing region, in particular r. Bolshaya Tyrkanda, r. Malaya Tyrkanda, cr. Tumannii and cr. Tyssynchakyyt were discussed in article. Based on a comparative analysis of typomorphic characteristics of native gold from this region and from placer deposits associated with the well-known deposits of the Central Aldan region, the potential formation types of primary sources for such widespread placer occurrences were considered. Despite the close location of considered placers native gold in them differs by size, roundness and chemical composition. Average fineness of native gold from studied placers: Bolshaya Tyrkanda - 861?, Malaya Tyrkanda - 926?, cr. Tumannii - 910?, cr. Tyssynchakyyt - 941?. The elements-admixtures - Hg up to 0,7% and Cu up to 1,13% were discovered using Microprobe analysis. On the plots of fineness of native gold from considered placers the two groups of gold particles were distinguished - with high, very high fineness and low and medium fineness. Native metal with high and very high fineness is close by chemical composition to gold from placers of Timpton river and P. Pinigin deposit. Native gold with medium and low fineness were commonly founded in the placers associated with well-known gold-bearing deposits of the Kuranakh and Lebedinsky types. Significant amounts of gold with low and medium fineness in placers of the Bolshaya and Malaya Tyrkanda rivers probably suggests the presence in the Tyrkanda gold-bearing region of primary sources of low-grade gold, along with sources of gold with high and very high fineness.
conference
https://www.sgem.org/index.php/jresearch-article?citekey=Zhuravlev20201357364
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20th International Multidisciplinary Scientific GeoConference SGEM 2020
20th International Multidisciplinary Scientific GeoConference SGEM 2020, 18 - 24 August, 2020
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference-SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts & Letters; Acad Fine Arts Zagreb Croatia; C
357-364
18 - 24 August, 2020
website
cdrom
6855
Aldan-Stanovoy shield; Tyrkanda gold-bearing region; native gold; typochemical features of native gold.