| 郭海,马德胜,白培荣,曾禹人,吴滔.西藏九子拉地区早泥盆世达尔东组沉积特征浅析[J].贵州地质,2018,35(1):26-31 |
| 西藏九子拉地区早泥盆世达尔东组沉积特征浅析 |
| Brief Analysis on Daerdong Formation Sedimentary Characteristics of Early Devonian in Jiuzila Area, Tibet |
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| DOI： |
| 中文关键词: 九子拉地区 早泥盆世 达尔东组 碳酸盐岩台地相 西藏 |
| 英文关键词:Jiuzila area Early Devonian Daerdong formation Carbonate landform facies Tibet |
| 基金项目:“西藏1∶5万九子拉地区四幅区域地质调查项目（编号：1212011121230）和西藏1∶5万恐弄拉地区四幅区域地质调查项目（编号：12120114062301）”项目联合资助。 |
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| 中文摘要: |
| 通过西藏九子拉地区1∶5万4幅区域地质调查项目的开展，在西藏九子拉地区纳木错—嘉黎结合带内新识别出一套碳酸盐岩夹碎屑岩地层，依据采获的早泥盆世Ozarkodina spp.牙形石化石，厘定下泥盆统达尔东组；通过对该组单剖面沉积相分析及相剖面对比研究，得出工作区早泥盆世达尔东组属稳定的碳酸盐岩台地相沉积；结合冈底斯区域上古生代沉积特征，证实九子拉地区的早泥盆世沉积同属于冈瓦纳大陆北缘古生代稳定型被动大陆边缘沉积，早泥盆世达尔东组沉积特征为古特提斯洋南岸典型的稳定型碳酸盐岩台地相沉积。 |
| 英文摘要: |
| By the promotion of 4 projects of 1∶50000 regional geological survey in Jiuzila area of Tibet, a series of carbonate rock and clastic rock stratum was found newly in Namucuo-Jiali suture belt in Jiuzila area of Tibet. For the founded Ozarkodina spp conodont fossil in early Devonian, Daerdong formation of lower Devonian was determined. By analysis the single section sedimentary facies and compare the phase section, it was known Daerdong formation of early Devonian in the work area was stable carbonate platform facies sediment. According to upper paleozoic sedimentary characteristics in Gangdise area, it was proved early Devonian sediment in Jiuzila area also belong to paleozoic stable passive continental margin sediment of northern Gondwana, the sedimentary feature of Daerdong formation, early Devonian is typical stable carbonate platform facies sediment of south palaeo tethys ocean. |
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