论文部分内容阅读
天井铁矿床位于康滇地轴铁矿带上,成矿条件优越。文章在对区域成矿地质背景、矿区地质特征、矿体特征、矿石特征等进行仔细研究的基础上,分析认为该矿区原生矿床成因为中低温热液矿床,而残积坡则是原生矿风化后堆积形成的,并提出应进行重点找矿的3个区域。结果表明,矿体主要赋存于中元古界下昆阳群大龙口组地层中,矿区成矿有两次成矿事件:1)晋宁期基性岩浆顺断层侵入形成中低温热液矿床,2)燕山运动使地层抬升,浅部的矿体遭受剥蚀风化,形成了残坡积的赤铁矿、褐铁矿。
The Paleogene iron deposit is located on the axis of the Kangdi-Dian iron ore belt, with favorable metallogenic conditions. On the basis of careful study of the geological background of mineralization, the geological characteristics of ore district, ore body characteristics and ore characteristics, the article analyzes that the original deposits of this mine area are of low-medium temperature hydrothermal deposit and the residual slope is the result of the weathering of the primary ore Accumulation formed, and proposed to focus on prospecting of the three regions. The results show that the orebodies mainly occur in the Dalongkou Formation of the Kunyang Group under the Proterozoic Proterozoic. There are two metallogenic events in the ore deposits: (1) the basic magmatic intrusions in Jinning Period formed the middle-low temperature hydrothermal deposit 2) The Yanshan movement raised the strata, and the shallow ore body suffered erosion and weathering, forming hematite and limonite with residual slope.