| 摘要: |
| 陡山沱早期,沉积环境自北西向南东可大致分为碳酸盐台地潮上坪-台缘浅滩相和浅海陆棚盆地相;陡山沱晚期,自北西向南东可大致分为开阔台地相区和深水陆棚-次深海相区。庙河型生物群的产出位于晚期开阔台地向深水陆棚-次深海过渡相区中的黑色页岩、硅质页岩中,其沉积环境为最大浪基面以下的宁静、贫氧环境,其沉积方式为悬浮沉积。 |
| 关键词: 岩相古地理 庙河型生物群 新元古代 陡山沱期 黔东北 |
| DOI： |
| 附件 |
| 投稿时间：2005-01-19修订日期：2005-10-20 |
| 基金项目:国家自然科学基金(40162002,40232020)。 |
|
| Sedimentary facies and palaeogeography of NE Guizhou and its adjacent areas during the Doushantuoan(Neoproterozoic) |
| HE Ming-hua, YU Mei-yi, WANG Yue, YUAN Liang-jun, ZHAO Yuanlong, HUANG Long-hui |
(1. No. 103 Geological Party, Guizhou Bureau of Geology and Mineral Resources, Tongren 554300, Guizhou, China;
2. Faculty of Resources and Environments, Guizhou University, Guiyang 550003, China) |
| Abstract: |
| Sedimentary environments in northeastern Guizhou and its adjacent areas may be divided into the intraplatform supertidal flat-periplatform shoal and shallow-sea shelf basin facies during the early Doushantuoan,and deep-water shelf-bathyal facies also from northwest to southeast during the late Doushantuoan.The Miaohe-type biotas occur in the black shale and siliceous shale in the transitional areas from the late open platform facies to deep-water shelf-bathyal facies.The preceding sedimentary environments are interpreted as the quiet and dysaerobic environments below the maximum wave base,and suspension deposition acts as a main kind of depositional styles. |
| Key words: sedimentary facies and palaeogeography Miaohe-type biota Neoproterozoic Doushantuoan NE Guizhou |
