Genesis of Gold-Bearing Placers and Their Possible Sources (Eastern Siberian Platform)

被引：8
|
作者：
Nikiforova, Z. S. [1 ]
Gerasimov, B. B. [1 ]
Tulaeva, E. G. [1 ]
机构：
[1] Russian Acad Sci, Siberian Branch, Inst Geol Diamond & Noble Met, Yakutsk 677980, Russia
来源：
LITHOLOGY AND MINERAL RESOURCES | 2011年 / 46卷 / 01期
基金：
俄罗斯基础研究基金会;
关键词：
MORPHOLOGY; DEPOSITS; GRAINS;
D O I：
10.1134/S0024490210041017
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Typomorphic features of placer gold in the eastern Siberian Platform were studied to determine its genesis. It was established that this region contains abundant alluvial bar placers, which were formed mainly by the erosion of gold reservoirs of different ages. Discovery of gold with the points of eolian reworking in the Quaternary sediments allows us to predict the eolian gold placers in individual areas of the northeastern and central parts of the eastern Siberian Platform. Identification of two types of gold on the basis of typomorphic features in the Cenozoic deposits indicates that placer gold was mainly derived from the Precambrian sources spatially confined to the exposure of ancient basement, as well as from local ore occurrences related to the Mesozoic tectonomagmatic activation. Thus, two main stages of ore formation (Precambrian and Mesozoic), were substantiated for the first time in the eastern Siberian Platform.
引用
收藏
页码：17 / 29
页数：13
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