新疆地质
新疆地質
신강지질
XINJIANG GEOLOGY
2014年
2期
172-179
,共8页
西天山%吐拉苏盆地%伊尔曼德金矿%成矿模式
西天山%吐拉囌盆地%伊爾曼德金礦%成礦模式
서천산%토랍소분지%이이만덕금광%성광모식
West Tianshan%Tulasu Basin%Yelmand gold deposit%Metallogenic model
伊尔曼德金矿位于吐拉苏盆地奥陶系灰岩与中上泥盆统火山-沉积岩间的不整合面，赋矿围岩为蚀变凝灰岩、岩屑凝灰岩和凝灰质砂岩，矿石为热液角砾岩。矿石角砾成分复杂，胶结物为石英、黄铁矿和白铁矿。据矿石中脉体的切穿关系，将成矿作用划分为：硅化、黄铁矿化和绢云母化阶段（I）；角砾化、硅化、黄铁矿-白铁矿阶段（II）及重晶石-方解石阶段（III）。两期流体作用叠加形成高级泥化带的过程对应着金矿成矿过程。在研究伊尔曼德金矿成矿作用的基础上，建立新的成矿模式。
伊爾曼德金礦位于吐拉囌盆地奧陶繫灰巖與中上泥盆統火山-沉積巖間的不整閤麵，賦礦圍巖為蝕變凝灰巖、巖屑凝灰巖和凝灰質砂巖，礦石為熱液角礫巖。礦石角礫成分複雜，膠結物為石英、黃鐵礦和白鐵礦。據礦石中脈體的切穿關繫，將成礦作用劃分為：硅化、黃鐵礦化和絹雲母化階段（I）；角礫化、硅化、黃鐵礦-白鐵礦階段（II）及重晶石-方解石階段（III）。兩期流體作用疊加形成高級泥化帶的過程對應著金礦成礦過程。在研究伊爾曼德金礦成礦作用的基礎上，建立新的成礦模式。
이이만덕금광위우토랍소분지오도계회암여중상니분통화산-침적암간적불정합면，부광위암위식변응회암、암설응회암화응회질사암，광석위열액각력암。광석각력성분복잡，효결물위석영、황철광화백철광。거광석중맥체적절천관계，장성광작용화분위：규화、황철광화화견운모화계단（I）；각력화、규화、황철광-백철광계단（II）급중정석-방해석계단（III）。량기류체작용첩가형성고급니화대적과정대응착금광성광과정。재연구이이만덕금광성광작용적기출상，건립신적성광모식。
Yelmand gold deposit locates in Tulasu volcanic-sedimentary basin.The orebody lies on the unconformity be-tween the basement and Middle-Late Devonian volcanic-sedimentary strata. The wall-rocks are tuff, lithic tuff and tuffa-ceous sandstone.The orebody consists of hydrothermal breccias which were cemented by quartz and sulfides. Fluid evolu-tion can be divided into three stages:silicification,pyritization and sericitization (stage I);brecciation,silicification,and crystallization of pyrite and marcasite (II);crystallization of barite and calcite (III).The advanced argillization resulted from the combination of two-stage fluid,and this process plays a primary role in the formation of gold deposit.We estab-lished a metallogenic model for the Yelmand gold deposit based on previous studies and our new data.
