摘要
西天山阿吾拉勒火山岩带与伊什基里克-那拉提北缘火山岩带间的巩乃斯河谷中发育一条规模大、幅值高的航磁异常带。2011年布设ZK001深孔对吐尔根一带的C-2009-2402高磁异常进行查证,在地表952.9 m以下,揭露出一个由辉长岩、闪长岩、英云闪长岩和花岗闪长岩组成的中基性侵入杂岩体,规模较大。其中辉长岩具较强磁铁矿化和磁黄铁化,伴随Au,Cu,Zn矿化,是引起磁异常的主要原因。深孔中侵入杂岩体与两侧火山岩带中铁矿床含矿岩石具明显的相似性和亲缘性,是一个同时、同源、同系列岩浆演化系统的产物,具海相中基性火山岩Fe、CuPb-Zn、Au成矿系列的矿化特征,构成了西天山石炭纪岩浆侵入-喷发成矿系统。
A large-scale,high-amplitude aeromagnetic anomaly in the Gongnaisi River Valley between the Awulale and northern Yishijilike- Nalati volcanic belt,Western Tianshan, has received particular attention.To investigate the C- 2009-2402 high magnetic anomaly at Tuergen area,drill hole ZK001 was carried out in 2011 and revealed an intermediate-basic intrusive complex consisting of gabbro,diorite,tonalite and granodiorite,at a depth of 952.9 m.The gabbro has intense magnetite-pyrrhotite mineralization and Au-Cu-Zn mineralization,which may be the primary cause of magnetic anomaly.The deep intrusive complex have similarities and affinities with host rocks of iron ores in the surrounding volcanic belt,and both of them were the products of a coeval and comagmatic suite.They have features of metallogenic series of Fe,CuPb- Zn, and Au related to submarine intermediate- basic volcanic rocks,and constitute the ore system that related to the Carboniferous intrusive and volcanic rocks in the Western Tianshan.
出处
《新疆地质》
CAS
CSCD
2015年第1期7-14,共8页
Xinjiang Geology
关键词
西天山
航磁异常查证
深孔
侵入杂岩
地质意义
Western Tianshan
Aeromagnetic anomaly investigation
Deep drill-hole
Intrusive complex
Geological implication
