另一种以铁闪锌矿为标志，矿体呈似层状、脉状及不规则状等，靠近岩体接触带或断裂与赋矿层的交汇部位产出，代表了成矿第二世代。
Marmatite is the guide mineral of the second ore type which appears in bedded, veined and irregular ore bodies near contact zone of magmatic rock or joint positions between faults and ore beds.
某地区志留系中的铀矿床，主要受硅灰岩和硅岩含矿层形态变异部位和断裂构造控制。
The uranium deposit of Silurian age in a certain area is controlled mainly by fracture and morphologically changing parts of uranium bearing siliceous limestone and chert beds.
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