【摘要】 <正> 九毛锡矿位于环太平洋锡矿成矿带的西段,江南古陆的西南缘桂北隆起带之南端。笔者通过野外工作和初步室内工作,认为九毛锡矿床区别于国内外其他锡矿床有三:(1)成矿物质来源与超基性岩有关;(2)成矿时期较古老,为四堡、雪峰期;(3)成矿温度以中—低温为主。根据木锡石产出,还说明具浅成的地质特征。一、成矿地质条件九毛锡矿产于桂北元宝山复式花岗岩体东侧,超基性岩和四堡群变质岩及两者的接触带中。区内地质构造复杂,出现地层倒转,主要构造线呈南北向和北北东向延伸。本区出露地层主更多还原

【Abstract】 The Jiumao tin ore, with polycyclic and polygene features, is situated at northern Guangxi, most ore bodies were formed in the environment with a medium-low temperature of 260-160℃, a medium-hypabyssal depth and a pressure of 540-340 bar. Being the most ancient one of our country in metallogenic epoch, the deposit and its distinct tectono-metallogenic conditions are worth studying. The ore deposit possesses the element and mineral assemblages formed by both end member lithologies i.e., basic-ultrabasic rocks and granite. This ore deposit can be divided into 3 metallogenic phases, 7 metallogenic stage with a certain amount of dneprorskite. The cassiterites exhibit many kinds of typomorphic characteristics indirectly reflecting the genesis of this deposit. There are gasliquid, liquid and daughter mineral inclusions in this deposit, the gaseous inclusions are dominant. The metallogenic fluid is mainly the hydrothermal solution belonging to the NaCl-KCl-H₂O system:更多还原