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矿床位于怒江以西腾冲褶皱带的南段,槟榔江与大盈江两断裂之间,石炭系在区内分布广泛,构造岩浆活动极为强烈,与矿床有关的热液蚀变显著。矿床由四个矿体群组成。矿体呈透镜状、分枝脉状、瘤状产出,形态复杂,变化极大;严格受构造控制,与花岗岩关系密切。Ⅰ、Ⅲ矿体群产于中细粒黑云二长花岗岩之正接触带及其两侧破碎带中,Ⅱ矿体群产于复背斜轴部角岩或角岩化岩石的断裂带中,Ⅳ矿体群产于断裂交汇处。成矿对围岩岩性的选择很不明显,而与热液蚀变的关系密切,主要见云英岩化在构造裂隙中交代充填成矿。矿石类型较简单,矿物成分单一,锡矿物几乎全为锡石,他形——半自形为主,形成粒状、柱粒状变晶结构,因成矿后构造作用或表生作用的破碎,形成角砾状矿石及碎裂结构。本文根据已得资料,对控矿条件及成矿过程进行剖析和探讨,认为属交代、充填形成,是气成——热液锡石云英岩型矿床。
The deposit is located between the southern segment of the Tengchong fold belt west of the Nujiang River and the two faults between the Binglang and Dayingjiang. The Carboniferous is widely distributed in the area and the tectonomagmatic activity is extremely intense. The hydrothermal alteration related to the deposit is significant. The deposit consists of four ore body groups. Ore was lenticular, branched veins, tumor-like output, complex shape, great changes; strictly controlled by the structure, closely related to the granite. The ore body of group Ⅰ and Ⅲ is produced in the positive contact zone of both fine-grained biotite monzogranite and its crust on both sides. The orebody group Ⅱ is produced in the fault zone of hornfels or hornfels in the anticlinal axis , Ⅳ ore body at the fault intersection. The selection of ore-forming lithology is not obvious, but closely related to the hydrothermal alteration. The main result is that the Yunying Formation infiltrated the tectonic fissures into mineralization. The ore type is simple, the mineral composition is single, the tin minerals are almost all cassiterite, and the shape of hemi-self is mainly dominated by semi-automorphism, forming granular and columnar grain structure, which is formed by the tectonic or epigenetic effects of mineralization. Brecciated ore and fragmentation structure. Based on the available data, this paper analyzes and discusses the ore-controlling conditions and metallogenic process, and considers that it belongs to the genesis and filling and forms the gas-hydrothermal cassiterite-type deposit.