Rhaetian diamond placers in Siberia

被引：4
|
作者：
Grakhanov, S. A. [2 ]
Malanin, Yu. A. [2 ]
Pavlov, V. I. [2 ]
Afanas'ev, V. P. [1 ]
Pokhilenko, N. P. [1 ]
Gerasimchuk, A. V. [3 ]
Lipashova, A. N. [3 ]
机构：
[1] Russian Acad Sci, Siberian Branch, Sobolev Inst Geol & Mineral, Novosibirsk 630090, Russia
[2] Nizhnelenskoe Joint Stock Co, Yakutsk, Russia
[3] ALROSA Enterprise, Mirnyi 678170, Russia
来源：
RUSSIAN GEOLOGY AND GEOPHYSICS | 2010年 / 51卷 / 01期
关键词：
diamond; deposit; placer; Upper Triassic; northern Yakutia; PLATFORM;
D O I：
10.1016/j.rgg.2009.12.014
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Large diamond placers have been discovered in a Rhaetian basal horizon (Upper Triassic) in the north of the Sakha Republic (Yakutia) in the drainage areas of the Eekit, Nikabyt, Kelimyar, and Bur Rivers. In typomorphic features the found diamonds and indicator minerals of kimberlites are completely similar to those from Carnian basal horizons but, in contrast to them, are well sorted, and pyropes show features of mechanical wear. Analysis of the geologic evolution of the study area, morphology of diamonds and indicator minerals, and composition of the latter showed that the Rhaetian productive sediments resulted from the erosion of Carnian placers. (C) 2010, IGM, Siberian Branch of the RAS. Published by Elsevier B. V. All rights reserved.
引用
收藏
页码：127 / 135
页数：9
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