| 广东梅县嵩溪早侏罗世火山活动及其地质构造与成矿意义 |
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| 引用本文： | 郑庆年.广东梅县嵩溪早侏罗世火山活动及其地质构造与成矿意义[J].矿产与地质,1996(2). |
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| 作者姓名： | 郑庆年 |
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| 作者单位： | 广东有色矿产地质研究所 |
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| 摘 要： | 从熔岩——玄武岩的岩石学、岩石化学、微量元素、稀土元素和锶同位素组成，以及火山旋回中玻璃碎屑岩诸方面特征，详细地研究了下侏罗统含矿层位内海底基性火山活动，阐述矿区玄武岩形成环境为夭折的大陆裂谷前期地壳槽形裂陷地堑系——裂陷槽。并讨论该裂陷槽环境中基性火山活动的银锑成矿意义
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| 关 键 词： | 火山活动，海底喷发，火山喷气，槽形裂陷，淋滤萃取，广东 |
VOLCANISM, TECTONIC SETTING AND THEIR SIGNIFICANCE FOR MINERALIZATION AT EARLYJURASSIC EPOCH IN SONGXI, GUANGDONG |
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| Zheng Qingnian.VOLCANISM, TECTONIC SETTING AND THEIR SIGNIFICANCE FOR MINERALIZATION AT EARLYJURASSIC EPOCH IN SONGXI, GUANGDONG[J].Mineral Resources and Geology,1996(2). |
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| Authors: | Zheng Qingnian |
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| Abstract: | Based upon the data in petrology, petrochemistry, trace element, REE and Sr isotopic composition of the lava-basalt, and characters of the hyaloclastite in the volcanic cycle, the characters of basic volcanism in the ore bearing bed in the lower Jurassic series are detailly studied; the tectonic setting for the formation of basalt in the mining area is discribed as a trough shaped crustal rift graben-a rift trough finished in the early stage of the continental rift; and the significance of basic volcanism for silver and antimony mineralization in the trough is discussed in this paper. |
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| Keywords: | Volcanism Oceanic floor eruption Volcanic exhalation Trough shaped rift graben Leached extraction Guangdong |
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