赣西红土型金矿床地质特征,成矿地质条件和找矿前景分析

赣西红土层分布广泛，红土风化壳具有典型的红土剖面特征，红土型金矿主要形成于杂色粘土带中，分为蛇屋山式和大坊式两类。矿体呈线型—面型分布，以层状、似层状、透镜状产出，产状较平缓。矿石构造为土状、花斑状、角砾状，矿床规模小—中型。通过分析红土型金矿构造地貌条件与红土风化壳、含金矿源体、卡林型金矿的关系，认为在萍乐坳陷带中成矿条件较好，含金矿质来源丰富，构造相对稳定，地貌多低山丘陵，对成矿有利。并指出萍乐坳陷带中与卡林型金矿母岩风化有关形成的红土区是寻找红土型金矿最有利的地区，认为赣西红土型金矿具有较好的找矿前景。

GEOLOGICAL FEATURES,METALLOGENIC CONDITIONS AND EXPLORATION PERSPECTIVE OF LATERITE GOLD DEPOSITS IN WESTERN JIANGXI

The laterite beds distribute widely in western Jiangxi,The weathering crust of laterite is characterized by typical laterite profiles. The laterite gold deposits mainly occur in the variegated clay zone,and can be devided into the Shewushan type and the Dafang type. The orebodies occur as layered or lenticules with slight dipping. The ore structures include earthy, graniphyric and breccia structures. The deposits are generally from small scale to medium scale.Through the analyses on the relations of laterite gold deposits with the conditions of structures and land forms and the weathering crust of laterite and the gold bearing source bodies,it shows that there exist good metallogenic conditions in the Subsidence Belt of Pingxiang Leping,and the preferential districts for exploration of laterite gold lie in the laterite area related with the weathering of hostrocks of Carlin type gold deposits.