青海省果洛龙洼金异常区成矿特征及找矿方向

MINERALIZATION FEATURES AND PROSPE CTING GUIDE OF GOLD DEPOSITS IN GUOLUOLONGWA DISTR ICT,QINGHAI PROVINCE

从果洛龙洼地区较有利的金成矿地质环境和地球化学特征入手,阐述了该区石英脉型和构造破碎带型金的矿化特征和蚀变特征.其中,厚脉状石英脉型金矿化规模较大,由近似纯的石英构成,金最高品位35.3×10-6,预测金资源量大于5t,属可供普查的中型矿床,为本区新的成矿类型,对于今后找矿工作具有指导意义.

Luoguolongwa Au anomaly is occurred in Dulan County,Qinghai Province,Northwest China.The anomaly is controlled strictly in Lower Carbon iferous strata.The assemblage of an omalous elements is mainly Au,associated with Ag,Pb,Cu and Co.The anomaly is high i n strength and large in scale,with th ree obvious zones and two concentrated centers.Quartz vein type of gold min eralization is dominant in the anoma lous district.The lodes are compose d of al-most-pure puartz,with the highest g old grade up to 35.3×10 -6 and a reconnaissance resources over5t.The area is potential for medium sized gold deposit.The mineralization should be a n ew type in the area.It is an important guide for the gold prospecting there.