| 新疆东准噶尔地区斑岩铜矿地质特征与成因 |
| 点此下载全文 |
| 引用本文：王军,李廷栋,耿树方,聂凤军.2010.新疆东准噶尔地区斑岩铜矿地质特征与成因[J].地球学报,31(3):423-433. |
| DOI：10.3975/cagsb.2010.03.15 |
| 摘要点击次数: 5095 |
| 全文下载次数: 7158 |
|
| 基金项目:国家科技支撑课题(编号: 2007BAB25B02)；地质调查项目(编号: 1212010911029) |
|
| 中文摘要:东准噶尔成矿带是中国主要矿集区之一, 也是斑岩矿床形成的有利地区。近年来, 在东准噶尔邻区先后发现了土屋和欧玉陶勒盖特大型斑岩铜矿, 推动了东准噶尔地区斑岩铜矿的找矿和研究工作, 之后又发现了哈拉苏, 蒙西、玉勒肯哈拉苏、琼河坝、和尔赛、铜华岭和乌伦布拉克等斑岩铜矿。本文论述了东准噶尔斑岩铜矿形成的地质背景, 依据金属矿床围岩岩性组合和成矿作用特征, 确定东准噶尔斑岩铜矿床有2个成矿时代和二种矿床类型: 早古生代斑岩铜钼矿床和晚古生代斑岩铜金矿床。在较详细剖析各类金属矿床(点)基本地质特征的基础上, 划分了3个矿化集中区: 卡拉先格尔斑岩矿集区、乌伦布拉克斑岩矿集区和琼河坝斑岩矿集区, 并讨论了东准噶尔区域地壳演化与金属成矿作用的关系。研究结果表明, 本区的金属矿床(点)成矿作用分别形成于萨吾尔晚古生代岛弧和纸房－琼河坝早古生代岛弧, 大规模成矿作用的发生与板块构造活动相吻合, 是地壳特定演化阶段构造-岩浆活动的产物。 |
| 中文关键词:斑岩铜矿床 矿床地质特征 岩浆活动 成矿作用 东准噶尔 |
| |
| Geological Characteristics and Genesis of Porphyry Copper Deposits in East Junggar Region |
|
|
| Abstract:The East Junggar metallogenic belt is one of the main ore districts with favorable geological conditions for the formation of porphyry ore deposits. In recent years, Tuwu and Oyu Tolgoi large-size porphyry copper deposits were found in adjacent areas, which promoted the exploration and research work of porphyry copper deposits in East Junggar region. Porphyry copper deposits such as Halasu, Menxi, Yulekenhalasu Qiongheba, Heaisai, Tonghualing and Wulunbulake were discovered in succession. This paper deals with the geological setting of por-phyry copper deposits formed in East Junggar. According to lithologic and ore-forming characteristics of the por-phyry copper deposits, the authors have divided ore deposits in East Junggar into two types, i.e., the Early Paleo-zoic porphyry copper deposits and the late Paleozoic porphyry copper deposits. On the basis of a detailed analysis of the basic geological features of various types of metallic deposits (ore spots), three mineralization concen-trated areas were recognized, namely Kalaxianger, Wulunbulake and Quheba porphyry ore belts. The relationship between the regional crustal evolution in East Junggar and the metal mineralization was also studied. The results indicate that, although the mineralization of metallic deposits (ore spots) in the study region occurred in Early Pa-leozoic and Late Paleozoic, it was the early Paleozoic orogeny and the late Paleozoic orogeny that formed the Sawuer late Paleozoic island arc and Zhifang— Qiongheba Early Paleozoic continental island arc. The porphyry mineralization occurred in favorable orogenic areas. The period of the plate tectonic activity was coincident with the peak period of large-scale mineralization, which constituted a specific evolutionary stage of crustal tectonic magmatism. |
| keywords:porphyry copper deposit geological features of ore deposit igneous activity metallogeny East Junggar region |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|
