TRANSFER AND DEPOSITION OF GOLD IN THE CONGO WATERSHED

被引:13
作者
BENEDETTI, M [1 ]
BOULEGUE, J [1 ]
机构
[1] UNIV PARIS 06,GEOCHIM & METALLOGENIE LAB,CNRS,URA 196,F-75252 PARIS 05,FRANCE
关键词
D O I
10.1016/0012-821X(90)90179-2
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
Gold has been measured in water and suspended particulate matter samples coming from the Oubangui-Congo system. Gold anomalies up to 800 picoM/l were measured at two different locations. These are interpreted as the result of gold transport by dissolved organic complexes. Everywhere else the gold content is in the range of 10-11 M/l and gold is present as an aurous hydroxichloride complex. The knowledge of both discharge rates and gold content allows a quantification of the gold input into the Atlantic ocean. Respective values for dissolved and particulate gold input are equal to 2.86 t/a and 2.95 t/a. Both chemical denudation and physical weathering rates were computed from this new set of data. © 1990.
引用
收藏
页码:108 / 117
页数:10
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