| 加拿大霍普布鲁克金矿矿床地质特征 |
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| 引用本文： | 吴科锐,聂凤军,徐九华,张晓康.加拿大霍普布鲁克金矿矿床地质特征[J].地质通报,2015,34(6):1036-1044. |
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| 作者姓名： | 吴科锐 聂凤军 徐九华 张晓康 |
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| 作者单位： | 1.中国地质科学院矿产资源研究所，北京100037；2.北京科技大学土木与环境工程学院，北京100083 |
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| 基金项目： | 中国地质调查局项目（编号：12120115065901、12120115068701、1212011120326） |
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| 摘 要： | 霍普布鲁克(Hope Brook)金矿床是加拿大第六大金矿床,产于新元古界的阿巴拉契亚山脉阿瓦隆区岩体中,地表出露面积为3000×400m2,向深部逐渐变小。该矿具有复杂的岩脉构造,与浅水体为主的火山碎屑序列的长英质、镁铁质火山碎屑岩密切相关。矿床赋存于大范围的热液蚀变区中,蚀变区内普遍有酸浸现象,并具有大量的泥质蚀变特点。同位素年代学证据表明,成矿时代为早—中寒武世(576±10Ma),是多期次热液作用,同时伴有侵入岩浆以及火山作用产生的凝灰岩共同影响的产物,属于典型的高硫化的浅成低温热液金矿床。
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| 关 键 词： | 霍普布鲁克 加拿大 金矿床 地质特征 矿床成因 |
Geological characteristics of the Hope Brook gold deposit, Canada |
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| WU Kerui,NIE Fengjun,XU Jiuhu,ZHANG Xiaokang.Geological characteristics of the Hope Brook gold deposit, Canada[J].Geologcal Bulletin OF China,2015,34(6):1036-1044. |
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| Authors: | WU Kerui NIE Fengjun XU Jiuhu ZHANG Xiaokang |
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| Institution: | 1. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;2. Civil & Environment Engineering School, University of Science & Technology Beijing, Beijing 100083, China |
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| Abstract: | Located in the Chetwynd area along southwest coast of the Newfoundland island, the Hope Brook gold deposit is the sixth largest gold deposit in Canada. The Hope Brook gold deposit occurs in Avalon Zone intrusive body of Neoproterozoic Appalachian Mountain. Its has an area of 3000×400m2 at surface but is gradually reduced with the depth. The deposit has complex veined structure, and is closely associated with felsic and mafic pyroclastic rocks of the pyroclastic sequence. The deposit occurs in a large hydrothermal alteration area charecterized by argillic alteration. Isotope chronological evidence shows that the metallogenic epoch is Early Cambrian- Middle Cambrian (576±10Ma). The deposit experienced several times of hydrothermal activities, accompanied by joint effect of magmatic intrusion and tuff produced by volcanism, and hence should belong to a typical high sulfidation epithermal gold deposit. |
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| Keywords: | Hope Brook Canada gold deposit geological characteristics ore genesis |
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