摘要:
近年来我国的地质勘查评价工作在西藏冈底斯地区取得了重要的进展,除了初步证实其中的甲马、冲江、厅宫、驱龙等多个斑岩型铜矿床具有大型或超大型矿床的找矿前景外,富铁、富银多金属等矿产在冈底斯也具较大的资源远景,显示出西藏冈底斯成矿带有望成为具有世界级规模的铜、富铁、多金属成矿带。笔者综合近年来在西藏冈底斯地区地质勘查评价工作所取得的新成果,在对西藏冈底斯成矿带的成矿地质背景、成矿条件进行初步分析的基础上,对南冈底斯成矿带成矿系统的主要类型及其特征进行了初步研究,并根据成矿地质条件和已知矿床特征,在冈底斯成矿带中划分出5个铜、富铁、多金属成矿远景区,指出驱龙铜矿、厅宫铜矿、白容铜矿以及恰功富铁矿、洞中松多银多金属矿是冈底斯成矿带进一步勘查评价工作的首选目标。
Abstract:
The notable advances have been made for the exploration and assessment of the mineral resources in the Gangdise zone, Xizang. The zone has been known in recent years for the discovery of the large-sized or superlarge-sized Jiama, Chongjiang, Tinggong and Qulong porphyry copper deposits, and is thus expected to be a world-scale copper and iron polymetallic belt in the future. The metallogenic systems are discussed on the basis of tectonic framework, regional metallogenic settings and conditions, and may be classified into three categories:(1) the extensional continental marginal metallogenic system; (2) the convergent continental marginal metallogenic system, and (3) the intracontinental convergent metallogenic system. Five prospective areas have been delineated in the Gangdise metallogenic belt, where the Qulong copper deposit, Tinggong copper deposit, Bairong copper deposit, Qiagong iron deposit and Dongzhongsongduo silver polymetallic deposit are expected to be the targets for the further exploration and assessment of the southern Gangdise metallogenic belt, Xizang
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