内蒙古朝不楞铁多金属矿床地质特征及找矿方向

朝不楞铁多金属矿床位于内蒙古自治区东乌珠穆沁旗，大地构造位置处于西伯利亚板块东南缘查干敖包-奥尤特-朝不楞早古生代构造-岩浆岩带东段。中泥盆统塔尔巴格特组沉积岩是本区主要的赋矿地层，与铁多金属成矿关系密切。在朝不楞黑云母花岗岩和中泥盆统塔尔巴格特组沉积岩的接触部位，往往形成含铁-锌矿层及锰矿层的矽卡岩带，铁-锌矿体主要呈似层状、条带状和透镜体状分布于矽卡岩带中。朝不楞黑云母花岗岩不仅为铁多金属成矿提供了成矿物质，而且还提供了成矿流体和成矿动力。区域性NE向查干敖包-东乌旗深大断裂控制着本区岩体和多金属矿床的产出，朝不楞倒转背斜和NE向逆断层则控制铁多金属矿体的产出。矿区及外围的中泥盆统塔尔巴格特组沉积岩与多期次中酸性岩浆侵入体接触带及围岩裂隙密集带，是寻找铁多金属矿的主攻区域。

Geological Characteristics and Prospecting Direction of the Chaobuleng Iron Polymetallic Deposit in Inner Mongolia

Chaobuleng iron polymetallic deposit is located in the eastern part of Dongwuzhumuqinqi，Inner Mongolia，with the tectonic position situated at the southeastern margin of the Siberian plate，eastern magmatic belts of Chaganobo-Aoyoute-Chaobuleng，early Paleozoic tectonic.Ore stratum is dominated by middle Devonian sedimentary Taerbagete Group which closely related with iron polymetallic mineralization.At the contact position between Chaobuleng biotite granite and middle Devonian sedimentary，it shows the tendency to form iron-zinc and manganese skarn zone，in which iron-zinc body mainly as bedded，banded and lens-shaped distributed in skarn zone.Chaobuleng biotite granite iron provides not only original ore-forming minerals for polymetallic mineralization，but also ore-forming fluid and mineralization dynamic.Regional NE trending Chaganobo-Dongwuqi deep fault controls the rock mass and the output of polymetallic deposits in this area，and the Chaobuleng NE trending overturned anticline and reverse fault controls the output of polymetallic iron ore body.The mining area，as well as its external area，of the Devonian Taerbagete Group sedimentary rocks and the contact zone of multiple phases acidic magma intrusion and the densely-fractured wall rock belt are in the main areas looking for iron polymetallic ore.