Occurrence of Placer Gold Deposits from the Takaoi Area of the Middle Kalimantan, Indonesia

被引：0
|
作者：
Kim, In-Joon [1 ]
Lee, Jae-Ho [1 ]
机构：
[1] Korea Inst Geosci & Mineral Resources, Daejeon 305350, South Korea
来源：
ECONOMIC AND ENVIRONMENTAL GEOLOGY | 2006年 / 39卷 / 02期
关键词：
placer gold deposit; fluvial deposits; gravel bed; reserves of gold; Takaoi;
D O I：
暂无
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
Placer gold deposits is mainly distributed in the Takaoi area. The alluvium is unconsolidated or semiconsolidated deposit consisting of gravel, sand, and soil beds in ascending order. They unconformably overlies the Carboniferous-Permian schist and Cretaceous granodiorite substratum. Based on detailed facies analysis, the alluvium can be interpreted as a typical fluvial deposits containing gravel and sand beds of channel-fill unit and soil deposit of floodplain. Gold grains are included mainly in the gravel bed and vein quartz is only contained gold among all kinds of gravels. These features indicates that the source rock of the gold grain is vein quartz and gold grains are separated from vein quartz during transport and abrasion. The reserves of gold in this area reach to at least 792 kg.
引用
收藏
页码：191 / 212
页数：22
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