| 贵州威宁-赫章二叠系乐平统含铁、铝岩系的沉积环境及成矿元素富集特征 |
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| 引用本文： | 陈国勇.贵州威宁-赫章二叠系乐平统含铁、铝岩系的沉积环境及成矿元素富集特征[J].地质与勘探,2017,53(2):237-246. |
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| 作者姓名： | 陈国勇 |
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| 作者单位： | 贵州省地质矿产勘查开发局，贵州贵阳； 贵州省地质调查院，贵州贵阳； 贵州省地矿局113地质大队，贵州六盘水 |
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| 基金项目： | 贵州省地质矿产勘查开发局重大科研项目（贵州省重点地区“三稀”矿产分布及找矿靶区初步研究、黔西北地区铅锌找矿攻关）：编号黔地矿发（2011）17号和黔地矿纪要（2015）14号资助。 |
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| 摘 要： | 贵州威宁-赫章地区的二叠系乐平统宣威组第一段铁、铝岩系,是峨眉山玄武岩风化-沉积作用的产物.其中富集的稀土、稀有、稀散元素,与峨眉山玄武岩所处的构造位置和玄武岩风化的古地理位置有关.在六盘水裂陷槽区(B区),Cu、Ti、Sc、REE含量高,对应于六盘水裂陷槽复杂的地质环境;在裂陷槽边界西南,玄武岩剥蚀作用强烈,沉积层的厚度较薄,Nb、Ta和REE在强风化环境中富集;在裂陷槽边界北东,沉积厚度较大,Ga和V含量高,可能是沉积环境富集.风化作用是成矿有用组分富集的重要因素,它决定了稀土、稀有和稀散元素富集的趋势.有一些元素可以富集,达到工业利用价值,特别是Nb+ Ta,可能形成独立矿床.
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| 关 键 词： | 二叠系 铁、铝岩系 沉积环境 元素富集 威宁-赫章 |
| 收稿时间： | 2016/5/15 0:00:00 |
| 修稿时间： | 2016/11/17 0:00:00 |
Sedimentary environments and mineral element concentration features of iron-aluminum-bearing rock series in the Leping series of Permian of the Weining-Hezhang area, Guizhou |
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| Chen Guo-yong.Sedimentary environments and mineral element concentration features of iron-aluminum-bearing rock series in the Leping series of Permian of the Weining-Hezhang area, Guizhou[J].Geology and Prospecting,2017,53(2):237-246. |
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| Authors: | Chen Guo-yong |
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| Abstract: | In the Weining-Hezhang area of Guizhou, the iron-aluminum rock series in the Leping series of the Permian System are the product of weathering and sedimentation of basalt in the Emeishan. Of them, the content of REE is related with the structural setting and paleogeographic location of basalt in the Emeishan. The content of Cu, Ti, Sc and REE are high in the Liupanshui rift through, corresponding to the complex geologic environment there. Southwest of the boundary of the rift trough, basalt has experienced strong erosion, and the thickness of the deposited layer is relatively thin, and the Nb, Ta and REE are enriched in the intensely weathering environment. The content of Ga and V is high in the northeast of the rift through where the weathering is weak and the sedimentary thickness is big, which are concentrated in the sedimentary environment. Weathering is an important factor for the useful elements concentration, and weathering decides the concentration tendency of REE and rare elements. Some elements can be enriched to achieve industrial values, in particular, Nb+Ta may form an independent deposit. There are some elements which can be enriched to reach the value of industrial use, in particular, Nb+Ta, may form an independent deposit. |
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| Keywords: | Permian iron-aluminum series sedimentary environment element concentration Weining-Hezhang |
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