新疆尼勒克县穹库尔铁矿地质特征及成因探讨

Study on geological characteristics and genesis of the Xinjiang Nilka County Iron Dome Kurt

穹库尔铁矿在大地构造上位于阿吾拉勒-伊什基里克晚古生代裂谷系。矿区内地层以下石炭统大哈拉军山组中-中酸性火山碎屑岩为主,断裂构造为以北西西向、北西向为主,侵入岩主要为早二叠世混源序列的闪长玢岩。矿体主要受控于石炭统大哈拉军山组第二岩性段晶屑岩屑凝灰岩、角砾凝灰、安山质凝灰岩。矿体产状与围岩一致,呈似层状,分布较稳定,连续性较好。矿体最初形成于海相火山喷发沉积的时期。后期由于变质改造,主要是动力变质和接触变质(热液活动导致)使矿体进一步富集。

Ore bodies are mainly controlled by the Carboniferous Dahalajunshan group second lithologic section crystal lithic tuff,tuff breccia,tuff An Shan.The ore body is in line with the surrounding rock,which is like a layered,distributed and stable.The ore body was formed in the period of marine volcanic eruption.In the later period,the ore body was further enriched by the dynamic metamorphism and contact metamorphism(hydrothermal activity).