【摘要】 从区域成矿地质背景和主要矿床地质入手,分析了铁矿的主要控矿因素,认为区内铁矿床受地层、褶皱构造和同生断裂构造、岩相古地理等因素制约。地层和岩相古地理因素控制了整个矿带的展布和矿床的分布,褶皱构造和同生断裂构造控制了矿体的形态和规模。锆石LA-ICP-MS U-Pb同位素测年及矿石和围岩稀土元素地球化学特征分析结果显示,老并矿区布伦阔勒群内长英质片岩形成年龄晚于(532±3.9)Ma;区内铁矿床的矿石和赋矿围岩具有相似的稀土元素特征和变化曲线,总体具有轻稀土富集、重稀土亏损、呈右倾斜型特征,表明二者的物质来源具有同源性。指出了古元古界布伦阔勒群第二岩性段地层、火山沉积盆地边缘以及背斜转折端和向斜核部是区内铁矿今后找矿的重要方向。更多还原

【Abstract】 The Ta′axi to Tatulugou iron metallogenic belt,located in the western Kunlun to Kala Kunlun orogenic belt,has advantageous geologic structural and metallogenic geologic background.Based on metallogenic background and main deposit characteristics,iron deposits in the belt are controlled by formation,lithofacies paleogeography,fold structure and contemporaneous fault etc.The distribution of the ore belt and deposits are controlled by formation and lithofacies paleogeography.The fold structure and contemporaneous fault have controlled the orebody morphology and scale.LA-ICP-MS U-Pb isotopic dating of zircon and REE of the ores and their host rocks show that the age of felsic schist of Laobing mining area is later,(532±3.9)Ma.The ores and their host rocks have almost the same characteristics and REE pattern of the deposits in iron belt,which was characterized by a right inclined curve with LREE enrichment and depleted HREE.This shows the same material source between them.The new and the important directions for the next prospecting should be the second lithologic section of paleoproterozoic Bulunkuole group,the turn end of anticline,the core of syncline and volcanic sedimentary basin are.更多还原