| 黔南独山地区早泥盆世事件沉积记录及地质意义 |
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| 关键词:Early Devonian event deposition polymetallic mineralization Dushan, southern Guizhou Province |
| 基金项目:中国地质调查局地质调查项目“沉积岩鉴定手册”(编号: DD20190370-34);贵州省科技支撑计划项目(编号: 黔科合支撑〔2020〕4Y034号);贵州省地质矿产勘查开发局项目(编号: 黔地矿科合〔2017〕29号;黔地矿科合〔2018〕29号) |
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| Early Devonian Event-stratigraphic Records and Geological Implications in the Dushan Area, Southern Guizhou Province |
| Event sedimentation is still one of the hotspots of our geological society. The event sedimentation of the Upper Devonian Dalin Formation, Dushan area of southern Guizhou, provides new insights into the early Hercynian tectonic evolution of the South China Block. Field observations, profile measurements, petrographic studies, and some analyses demonstrated that the sandstone of the lowest part of the Danlin Formation had experienced liquefaction, during which a few euhedral or semi-euhedral monazite and rutile along with a large clump of pyrite were formed. Moreover, the Lower Devonian strata display regional antimony anomaly. Synthesizing available data, we suggest that there was likely hidden Early Devonian volcanic activity in the Dushan area, southern Guizhou. This hidden volcanic activity was recorded by the thermohydrous sediments. Thus, the lowest segment of the Dalin Formation likely formed in hot water basin environment. Antimony, lead, zinc, and iron mineralization in the Dushan area are all limited in the lower Devonian strata. Obviously, the polymetallic mineralization was controlled by stratigraphy and closely related to early Hercynian tectonism, which has affected a wide region of the South China Block. |
| HAN Xue,LIU Ling-yun,CHEN Ren,TANG Zuo-qi,YE Tai-ping,DAI Ya-ran,CHEN Jian-shu.2021.Early Devonian Event-stratigraphic Records and Geological Implications in the Dushan Area, Southern Guizhou Province[J].Acta Geoscientica Sinica,42(6):814-822. |
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