西藏南部吉隆盆地晚中新世—早更新世沃马组介形虫动物群

陈奋宁; 徐亚东; 江尚松; 周修高

doi:10.3799/dqkx.2010.095

西藏南部吉隆盆地晚中新世—早更新世沃马组介形虫动物群

doi: 10.3799/dqkx.2010.095

陈奋宁^1,,
徐亚东^{2, 3},
江尚松^{2, 3},
周修高³

1.
西安地质矿产研究所, 陕西西安 710054
2.
中国地质大学生物地质与环境地质教育部重点实验室, 湖北武汉 430074
3.
中国地质大学地球科学学院, 湖北武汉 430074

基金项目:

中国地质调查局项目 1212010610103

国家自然科学基金项目 40921062

国家自然科学基金项目 40830212

详细信息

作者简介:
陈奋宁(1983-), 女, 研究实习员, 主要从事地层古生物和沉积学研究.E-mail: fenningc@yahoo.com.cn

中图分类号: P534;Q915
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出版历程
- 收稿日期: 2010-05-31
- 刊出日期: 2010-09-01

Late Miocene-Early Pleistocene Ostracoda Fauna of Oma Formation in Gyirong Basin, Southern Tibet

1.
Xi'an Institute of Geology and Mineral Resources, Xi'an 710054, China
2.
Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, China University of Geosciences, Wuhan 430074, China
3.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 根据在西藏南部吉隆盆地新近纪地层沃马组中获得丰富的介形类化石, 鉴定识别出介形虫9属37种, 其中8个未定种, 根据介形虫动物群在地层剖面上的分布规律, 建立了2个介形虫组合带, 自下而上为: Ilyocypris pentanoda-Qaidamothere vena组合带和Leucocythere mirabilis-Leucocytherella组合带.通过对研究区介形虫组合带与国内外其他地区相同层位的介形虫组合对比, 将沃马组的时代厘定为中新世晚期—早更新世.
- 吉隆盆地 /
- 沃马组 /
- 晚中新世-早更新世 /
- 介形虫组合带 /
- 西藏
Abstract: Diverse and abundant ostracoda fossils were found in the Gyirong basin in the south of the Tibet. Our research is based on 37 species of ostracoda including 8 undefined ones that belong to 9 generas. On the basis of the characteristics of ostracoda fossil succession, the ostracoda fauna in this area can be divided into 2 ostracoda assembldges in ascending order as follows: Ilyocypris pentanoda-Qaidamothere vena assembldge and Leucocythere mirabilis-Leucocytherella assembldge. We compared the ostracoda assembldges of Oma Formation with those worldwide at the same stratum and concluded that the age of Oma Formation is Late Miocene to Early Pleistocene.
- Gyirong basin /
- Oma Formation /
- Late Miocene-Early Pleistocene /
- ostracoda assembldge /
- Tibet

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图 1 吉隆盆地沃马组剖面位置及地质简图

1.全新统；2.更新统；3.中新统-下更新统沃马组；4.中新统旦增竹康组；5.上侏罗统门卡墩组；6.中侏罗统拉弄拉组/聂聂雄拉组；7.下-中侏罗统日当组；8.一般地质界线；9.角度不整合/平行不整合界线；10.正断层；11.逆断层；12.性质不明断层；13.县行政所在地；14.村镇；15.居民点；16.公路；17.简易公路；18.河流

Fig. 1. Location and general geological map showing the study section in the Gyirong basin in Tibet, China

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图 2 西藏吉隆盆地沃马组主要介形虫化石逐点分布

Fig. 2. Distribution of dominating ostrcoda in the Gyirong basin in Tibet, China

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图 3 西藏吉隆盆地中新世晚期—早更新世沃马组典型介形虫化石

1~15.产出层位：均采自吉隆沃马村，中-上新世沃马组剖面.1.Eucypris subgyrongensis Yang, 1982, 外视，右瓣，登记号：Xg006，采集号：S2JL49-1；2~3.Herpetocyprella dvalyi Schneidr 1963，外视，右瓣；2.登记号：Xg007，采集号：S2JL62-3；3.登记号：Xg008，采集号：S2JL19-1；4.Candona subxizangensis You et Huang 1982，外视，左瓣，登记号：Xg011，采集号：S2JL51-1；5.Candona himalayaensis You et Huang 1982，外视，左瓣，登记号：Xg012，采集号：S2JL42-1；6.Candona gyrongensis Huang 1982，外视，左瓣，登记号：Xg015，采集号：S2JL49-1；7.Ilyocypris xizangensis Yang 1982，外视，右瓣，登记号：Xg020，采集号：S2JL74-1；8.Ilyocypris pentanoda Yang 1982，外视，左瓣，登记号：Xg022，采集号：S2JL62-3；9.Ilyocypris subdushanensis Yang 1982，外视，左瓣，登记号：Xg025，采集号：S2JL62-3；10.Ilyocypris gyrongensis sp.nov，外视，左瓣，登记号：Xg028，采集号：S2JL62-3；11.Ilyocypris paragyrongensis sp.nov，外视，左瓣，登记号：Xg030，采集号：S2JL62-3；12~13.Qaidamocythere sp.，12.外视，左瓣，登记号：Xg031，采集号：S2JL62-3；13.外视，右瓣，登记号：Xg032，采集号：S2JL62-3；14.Qaidamocythere vena Huang, F.Yang et Sun 1988，外视，左瓣，登记号：Xg034，采集号：S2JL62-3；15.Qinghaicypris medialis Yang 1982，外视，左瓣，登记号：Xg035，采集号：S2JL74-1

Fig. 3. Representative photographs of ostricoda from the Oma Formation in the Gyirong basin in Tibet

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图 4 西藏吉隆盆地中新世晚期—早更新世沃马组典型介形虫化石(续)

1~18.产出层位：均采自吉隆沃马村，中－上新世沃马组剖面.1~2.Leucocythere mirabilis Kaufmann 1896，外视，左瓣，登记号：Xg039，采集号：S2JL74-1；2.外视，右瓣，登记号：Xg040，采集号：S2JL74-1；3.Leucocythere burangensis Huang 1982，外视，右瓣，登记号：Xg042，采集号：S2JL74-1；4.Leucocythere dorsotuberosa Huang 1984，外视，右瓣，登记号：Xg043，采集号：S2JL28-6；5.Leucocythere rugosa Huang et Sun 1988，外视，右瓣，登记号：Xg045，采集号：S2JL26-1；6.Leucocythere subsculpta Huang 1982，外视，右瓣，登记号：Xg048，采集号：S2JL74-1；7.Leucocythere subgongheensis Huang，外视，右瓣，登记号：Xg050，采集号：S2JL26-1；8~9.Candoniella xizangensis You et Huang 1982；8.外视，右瓣，登记号：Xg051，采集号：S2JL49-1；9.外视，右瓣，登记号：Xg052，采集号：S2JL49-1；10~11.Candoniella moincerensis You et Huang 1982，10.外视，右瓣，登记号：Xg053，采集号：S2JL51-1；11.外视，左瓣，登记号：Xg054，采集号：S2JL51-1；12.Candoniella suzini，外视，右瓣，登记号：Xg056，采集号：S2JL42-1；13.Candoniella zadaensis You et Huang 1982，外视，右瓣，登记号：Xg058，采集号：S2JL28-6；14.Leucocytherella sinensis Huang 1982，外视，左瓣，登记号：Xg060，采集号：S2JL97-1；15.Leucocytherella hyalina Huang et You 1982，外视，左瓣，登记号：Xg063，采集号：S2JL26-1；16.Leucocytherella glabra You et Huang 1982，外视，右瓣，登记号：Xg068，采集号：S2JL26-1；17~18.Leucocytherella trinoda Huang 1982；17.外视，左瓣，登记号：Xg072，采集号：S2JL97-1；18.外视，左瓣，登记号：Xg074，采集号：S2JL97-1

Fig. 4. Representative photographs of ostricoda from the Oma Formation in the Gyirong basin, Tibet (continued)

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图 5 西藏吉隆盆地中新世晚期—早更新世沃马组介形虫动物群与国内外对比

Fig. 5. Correlation of Late Miocene-Early Pleistocene ostrocoda fauna from Gyirong basin with other areas

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