江西相山邹家山-石洞断裂带及其控矿作用

Feature of Zoujiashan-Shidong Structure and its controlling over uranium deposit

邹家山-石洞断裂构造带（又称邹-石构造带）由几组大致平行的断裂组成，总体走向为30°～40°．倾向Nw或SE，倾角65°～85°，深切基底达10km，属区域性NE向走滑断层。根据断裂构造的发育程度、构造联合控矿作用等特点，自北向南将邹-石构造带分为石马山段、邹家山段、书塘段和石洞段。研究构造带的铀矿化蚀变特征及构造控矿规律发现，邹-石构造带在不同地段控矿形式不同，按容矿位置可分为两类，即主断裂容矿和旁侧次级断裂容矿。邹-石构造带的铀矿化作用明显分为两期，邹-石构造带附近的铀矿床均存在铀-赤铁矿型矿化蚀变，表明邹-石构造带对成矿的重要作用。相山矿田各矿床内矿带的展布表明，主要矿带走向的法线方向总是指向相山盆地的特定区域。在总结已知矿床规律的基础上，笔者认为邹-石构造带仍然是相山盆地最具找矿潜力的地区之一，书塘地区是邹-石构造带的首选找矿靶区。

This paper has analyzed the spatial formation characteristics of Zoujiashan-Shidong structure in detail： The fault zone is composed by several approximately parallel faults, with 30°-40° trending and NW or SE dipping at 65°-85°; which penetrate the base to the depth of 10 km and fall into the kind of strike-slip fault. According to the features of the fault and the characters of deposits-controlled by the structures, Zhou-Shi structure can be divided into Shimashan section, Zoujiashan section, Shutang section, Shidong section. On the basis of alteration characteristics of uranium mineralization and ore-controlling rules of structure, it is found that the ore-controlling pattern is different at each sections. The patterns can be divided into two kinds according to the ore-bearing locations： main fault ore-bearing pattern and secondary faults ore-bearing pattern. Mineralizations can be divided into two-epochs. The deposits adjacent to Zhou-Shi structure bear uranium-hematite type mineralization alteration, which indicates that Zhou-Shi structure is important to mineralization. The ore-belt distributing of Xiangshan deposit shows that the normal direction of the main ore-belt always points to the special region in Xiangshan basin. Based on the summary of the known mineralization rules, it is believed that Zou-Shi structure is still one of the most potential region in the Xiangshan area, and Shutang region should be selected as the first exploiting target in Zou-Shi zone.