| 藏北巴青中侏罗世Liostrea障积礁的发现 |
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| 引用本文： | 肖传桃,李世斌,胡明毅,龚文平,肖安成,林克湘,张存善.藏北巴青中侏罗世Liostrea障积礁的发现[J].地质通报,2001,20(1):90-93. |
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| 作者姓名： | 肖传桃 李世斌 胡明毅 龚文平 肖安成 林克湘 张存善 |
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| 作者单位： | 江汉石油学院地质系 |
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| 摘 要： | 在藏北巴青县马如乡布曲组中发现中侏罗世Liostrea障积礁，据造礁生物不同可分为Liostrea障积礁和Cyanobacteria－Liostrea粘结—障积礁。它们多呈似层状和层状，单个礁体厚4～8m，累计总厚为20～25m。Liostrea是一种单体牡蛎状的双壳类动物，分为左右两瓣壳，左壳强烈膨凸，右壳扁平，系以左壳固着生活特化而成，在本区构成了Liostrea群落和Cyanobacteria－Liostrea群落，代表温暖、清洁的正常浅海环境。
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| 关 键 词： | Liostrea（光蛎） 生物礁 侏罗纪 西藏 |
| 文章编号： | 1000－3967（2001）01－0090－04 |
| 修稿时间： | 5/4/1999 12:00:00 AM |
Discovery of the Middle Jurassic Liostreabarrier reefs at Baqên County， northern Tibet |
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| XIAO Chuan-tao,LI Yi-bin,HU Ming-yi,GONG Wen-ping,XIAO An-cheng,LIN Ke-xiang,ZHANG Cun-shan.Discovery of the Middle Jurassic Liostreabarrier reefs at Baqên County， northern Tibet[J].Geologcal Bulletin OF China,2001,20(1):90-93. |
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| Authors: | XIAO Chuan-tao LI Yi-bin HU Ming-yi GONG Wen-ping XIAO An-cheng LIN Ke-xiang ZHANG Cun-shan |
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| Abstract: | Middle Jurassic Liostrea barrier reefs were first discovered in the Biqu Formation， Maru， Baqên County， northern Tibet． According to reef-building organisms， Liostrea barrier reefs and Cyanobacteria-Liostrea binding-barrier reefs may be distinguished． They are mostly bed-like or bedded in shape． Every single reef is 4 to 8 m thick， with a cumulative thickness of 20 to 25 m． Liostrea is a solitary oyster-shaped bivalve animal with the left and right valves． The left valve shell bulges strongly， while the right valve shell is flat． Because this kind of organism lived with their left valve fixed to a substrate， they form the Liostrea community and Cyanobacteria－Liostrea community， representing a warm， clean normal neritic environment． |
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