礼县硐花沟铅锌矿地质特征及找矿标志

Geological Features and Prospecting Indicators of Tonghuagou Lead-Zinc in Lixian County

硐花沟铅锌矿大地构造位置处于秦岭造山带中秦岭褶皱带南亚带,区内断裂构造特别发育,矿(化)体产于薄层生物灰岩夹含炭千枚岩与含炭千枚岩夹薄层生物灰岩的接触带上,赋矿岩石为硅化灰岩,矿石组分单一,金属矿物见方铅矿、闪锌矿、黄铁矿及少量黄铜矿等。矿床位于西成铅锌成矿带的西延部位,属热水沉积-再改造成因矿床。矿体的产出与岩相古地理环境有关,也受层位和构造多因素控制。岩相过渡是主要的找矿标志,珊瑚灰岩内硅化或石英碳酸盐脉发育地段为矿体直接围岩或含矿岩石。

The tectonic position of the Tonghuagou lead-zinc deposit is in the South Qinling fold belt of the Qinling orogenic belt with a fault structures highly developed in the region. The mine （oriented） body produced in the contact zone between the thin layer of biological limestone containing carbon phyllite and the carbonaceous phyllite with thin-bedded biogenic limestone. The ore-bearing rock is silicified limestone. The ore composition is unitary and the metallic minerals includs ga- lena, sphalerite, pyrite, and a small amount of chalcopyrite, etc. The deposit is located in the western extension of the West into the lead and zinc mineralization with parts, is a hot-water deposition - readaptation oregenesis. The formation of the ore body is related to the lithofacies palaeogeography environment, also controlled by layers and construction of nmhi- factor. The facies transition is the main prospecting logo, coral limestone silicification or quartz carbonate veins develop- mental Lot ore body directly surrounding rock or ore rock. The facies transition is a major prospecting indicators, the silici- fication within the coral limestone or quartz carbonate veins developmental lot become the orebody direct surrounding rock or ore-bearing rock.