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| 贵州江口震旦系陡山沱组沉积层序和沉积环境分析 | |
| 引用本文： | 喻美艺,何明华,王约,赵元龙.贵州江口震旦系陡山沱组沉积层序和沉积环境分析[J].地质科技情报,2005,24(3):38-42. |
| 作者姓名： | 喻美艺 何明华 王约 赵元龙 |
| 作者单位： | 1. 中国地质大学,武汉,430074;贵州大学,贵阳,550003 2. 贵州省地质矿产勘查开发局103地质大队,贵州,铜仁,554300 3. 贵州大学,贵阳,550003 |
| 摘 要： | 通过对贵州江口桃映及邻区的坝黄、石竹溪的陡山沱组剖面的沉积序列研究,将陡山沱组划分为2个海侵-海退层序,并根据层序对比认为陡山沱期的生物群均产于陡山沱期第二次海平面开始上升之后形成的沉积中.从晚震旦世陡山沱期的第二次海侵开始是多细胞藻类、后生动物的第一次"爆发".桃映陡山沱组剖面产庙河生物群分子的沉积为局限滞流海盆沉积,进一步证明了庙河生物群型宏体生物的生存、保存环境模式仅限于局限滞流海盆中,为贫氧环境. |
| 关 键 词： | 海侵-海退层序 沉积环境 贵州江口 陡山沱组 震旦系 |
| 文章编号： | 1000-7849(2005)03-0038-05 |
| 收稿时间： | 2005-01-07 |
| 修稿时间： | 2005年1月7日 |
Sedimentary Successions and Environment of the Sinian Doushantuo Formation in Jiangkou,Guizhou Province |
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| YU Mei-yi,HE Ming-hua,WANG Yue,ZHAO Yuan-long.Sedimentary Successions and Environment of the Sinian Doushantuo Formation in Jiangkou,Guizhou Province[J].Geological Science and Technology Information,2005,24(3):38-42. | |
| Authors: | YU Mei-yi HE Ming-hua WANG Yue ZHAO Yuan-long |
| Abstract: | A new outcrop featuring the Miaohe biota was located within Doushantuo Formation section in Taoying,Jiangkou,Guizhou Province. This section represents a new previously undescribed occurrence of the Miaohe biota. This section provides significant information for interpreting the composition,palaeogeographic distribution, and the palaeoenvironment of the Miaohe biota. Two transgressive-regressive sequences can be distinguished in Doushantuo Formation by studying sedimentary structures and succession in the Taoying section and the adjacent Bahuang and Shizhuxi sections. Based on transgressive-regressive sequences contrast, biota of Doushantuo Formation can be interpreted to be deposited after the second sea level rise~ whereas the first transgressive-regressive sequence is largely barren of fossils. Metazoans and multicellular algae are first present in abundance at the onset of the second sea level rise of Doushantuo Formation in the Late Sinian. The sedimentary environment, in which the animals of the Miaohe biota were preserved, is in a restricted, low energy marine basin. Therefore,the survival and preservation of the Miaohe biota type macrocreature may have been limited to restricted, quiet-water marine basins with oxygen-poor conditions. |
| Keywords: | transgressive-regressive sequence sedimentary environment Jiangkou in Guizhou Doushantuo Formation Sinian |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |