placer gold

常见例句

It belong to karst type mountain crystal-placer gold ore. This discovery has practical significance for look for placer gold deposit in Guangxi.
此发现对寻找广西砂金矿，拓宽金矿资源的思路，具有现实意义。
The studied platinum-gold placer occurs in Quaternary alluvial-diluvial sediments within a piedmont valley of ultrabasic rocks, Northwest China.
该铂-金砂矿产于超基性岩体山前谷地的第四纪冲积-洪积层中。
Geological effects of the method have been also studied by these calculating results through the method for prospecting gold-placer in the north of Huma county in Heilnogjiang province.
文中通过对于黑龙江省呼玛河北部地区前寒武系砂金资源总量予测逻辑信息法的计算结果分忻，研究了该方法的地质效果。