佳木斯隆起东南缘地质背景、金矿成矿地质条件及找矿方向

GEOLOGICAL BACKGROUND, GOLD ORE-FORMING CONDITION AND PROSPECTING DIRECTION IN THE SOUTHEASTERN MARGIN OF JAMUSI UPLIFT

佳木斯隆起东南缘是由佳木斯地块、兴凯地块和龙岗地块经过漫长的地质时期逐渐增生拼合而成的。该区缺失前寒武纪时期的含金建造， 缺少变质热液型和韧性剪切带型金矿床产出的成矿地质条件。主要金矿床类型应是与火山－ 岩浆热液活动相关的（ 次） 火山热液型、斑岩型和矽卡岩型金矿床。找矿方向是燕山期浅成。

The present geological body in the southeastern margin of Jamusi uplift consists of Jamusi ,Xingkai and Long-Gang massifs experienced a prolonged geological period and formed gradualy through accretion and conjunction. It demonstrates that this area lacks Au-bearing formation during Pre-Cambrian period and lacks the geological metallogenic conditions to form gold deposits of the metamorphic-hydrothermal type and the ductile shear zone type.The main gold deposits of the subvolcanic rock type, the porphyry type and the skarn type closely related with volcanic and magmatic hydrothermal activities.The prospecting direction lies on the relatively smaller epithermal and supperepithermal intrusive intermediate-acid rocks during Yenshan movement.