| 黔东南雪峰隆起区大地构造属性之我见——质疑其华南造山带属性判定 |
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| 引用本文： | 盛学庸.黔东南雪峰隆起区大地构造属性之我见——质疑其华南造山带属性判定[J].贵州地质,2012,29(3):235-239. |
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| 作者姓名： | 盛学庸 |
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| 作者单位： | 贵州省地质矿产局,贵州贵阳,550004 |
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| 摘 要： | 黔东南地区昔称雪峰隆起,属扬子地台次级构造单元江南台隆的西段。自70年代引进美籍华人比较大地构造学家许靖华远程推覆构造理论后,部分国内机构和学者对这一地区的大地构造属性进行了再认识,并最终将其从扬子地台剥离出去,归入早古生代华南造山带范畴。然而这一结论却与该区客观上存在钾镁煌斑岩型金刚石原生矿成矿活动相矛盾。为查明究竟,笔者对该区金刚石成矿作用及成矿地质背景进行了全面分析,从金刚石地质学;邻区加里东俯冲带的位置及其两侧早古生代岩相-古地理、构造变形、变质作用和岩浆活动的巨大差异出发,论证了该区的早在中-晚元古代即已克拉通化,故应还其本来面目———扬子地台次一级构造单元-江南台隆之西段-雪峰隆起。
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| 关 键 词： | 大地构造属性 雪峰隆起 造山带 克拉通 金刚石地质学 俯冲带 黔东南 |
My View on Geotectonics of Xuefeng Uplift in Southeastern Guizhou Doubt about the Desision of South China Orogenic Belt Property |
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| SHENG Xue-yong.My View on Geotectonics of Xuefeng Uplift in Southeastern Guizhou Doubt about the Desision of South China Orogenic Belt Property[J].Guizhou Geology,2012,29(3):235-239. |
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| Authors: | SHENG Xue-yong |
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| Institution: | SHENG Xue - yong ( Guizhou Bureau of Geology and Mineral, Guiyang 550004, Guizhou, china) |
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| Abstract: | Southeastern Guizhou has been called Xuefeng uplift, is situated in the west of Jiangnan upwarp which is the secondary tectonic unit of Yangtze block. After the introduction of far - field nappe structure theo- ry of Chinese- Amercian Xu Qing- hua which is geoteetonic scientist in 1970s, some domestic institutions and scholar have some review on the geotectonic property in this area, it striped from Yangtze block and classi- fied among Huanan orogenic belt of Early Paleozoic, but dais conclusion is in contradiction with the lamproite primary diamond metallogenic activity in this area objectively. In order to find out the reason, the dianond metallogenesis and ore -forming background in this area are studied completely. In the diamond geology, the location of Caledon subduction zone of nearby area and the big differences of lithofaeies palaeogeography, structure deformation, metamorphism and magmatic movements of Early Paleozoic in the two sides, it tested that cratonization has finished in Middle - Late Paleozoic, so it should he the secondary tectonic unit of Yan- gtze unit and Xuefeng uplift in the west of Jiangnan upwarp. |
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| Keywords: | Geotectonics property Xuefeng uplift orogenic belt cratonization diamond geology sub-duction zone Southeast Guizhou |
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