| 摘要: |
| 甘肃省夏河地区的上二叠统毛毛隆组中的砾屑灰岩沉积位于中秦岭裂陷槽内,这些砾屑灰岩由原地砾屑灰岩和异地砾屑灰岩组成。它们的出现说明碳酸盐台地解体,出现台裂斜坡,并于槽向岩系的配合可以说明裂陷的部位。因此对砾屑灰岩的成因讨论,对于认识古构造发展有重要的意义。 |
| 关键词: 上二叠统毛毛隆组 砾屑灰岩 成因 甘肃 |
| DOI： |
| 附件 |
| 投稿时间：2001-11-26 |
| 基金项目: |
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| The genesis of the calcirudites from the Permian Maomaolong Formation in the Xiahe district, Gansu |
| LI Qi-lin, DAI Wen-jun, LIU Sheng-xiang, QIU Qing-lun |
| (Gansu Bureau of Geology and Mineral Resources, Lanzhou 730050, Gansu, China) |
| Abstract: |
| The calcirudites from the Upper Permian Maomaolong Formation in the Xiahe district, Gansu occur signifi-cantly in the Central Qinling fault depression, and comprise two types:autochthonous and allochthonous. These calcirudites are not considered to be tectonic mélanges; the thick lenticular calcirudites appear as chaotic olistostromes and/or collapsed circum-continental talus, passing upward into the debris flow deposits, which are characteristic of the platform slope deposits on passive continental margins, and differ greatly from the fractured mélanges as thrust sheets in the subduction zones. |
| Key words: Upper Permian Maomaolong Formation calcirudite genesis Gansu |
