Discovery of marine fossils in the upper part of the Permian Linxi Formation in Lopingian, Xingmeng area, China
Discovery of marine fossils in the upper part of the Permian Linxi Formation in Lopingian, Xingmeng area, China
复制标题
兴蒙地区洛平系二叠系林西组上部发现海相化石
DOI：
10.1007/s11434-013-0036-1
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发表时间：
2014-01
期刊：
影响因子：
--
通讯作者：
Su Kui
中科院分区：
文献类型：
--
作者：
Wang Meng;Shugang Tian;Zishun Li;Yuexan Gong;Enyuan Xing;Zhuozhuo Wang;Daxing Zhai;Cao jie;Su Kui
两个重要的地质问题在兴蒙地区有着长期的争论。一是华北板块、西伯利亚板块及区内几个中间板块的最终闭合;二是兴蒙海槽的褶皱和抬升。由于上二叠统林西组沉积的构造-古地理环境问题，出现了分歧。一般认为上二叠统林西组要么是完全的陆相存款，要么分为下-中林西期的海陆相沉积和上林西期的陆相沉积。在内蒙古东部林西县官地剖面的林西组上部厚层灰岩和透镜体中，首次发现了大量苔藓虫和海绵骨针化石。同时，在阿鲁科尔沁旗桃花营子剖面桃花营子组上部的沉积凝灰岩薄片中也发现了丰富的苔藓虫化石，在吉林省九台县杨家沟剖面杨家沟组暗色页岩中也发现了丰富的小连接体海百合茎化石。这些海相化石首次提供了兴蒙地区晚二叠世末仍为海相或以海相为主的环境的证据。这不仅为认识上述两大地质问题提供了确凿的证据，而且促进了东北-兴蒙地区晚二叠世地层中保存的油气、页岩气（油）等矿产资源研究、勘探和开发方式的转变。
Two important geological issues have a long history of debate in the Xingmeng area. The first concerns the final closure of the North China plate, Siberia plate and several intermediate massifs in the area, and the other concerns the folding and lifting of the Xingmeng Trough. Disagreements arise because of issues involving the tectonic-palaeogeographical environment of the Upper Permian deposits of the Linxi Formation. The Linxi Formation (Upper Permian) is generally considered to be either an exclusively continental deposit or separated into marine-terrigenous facies deposited during the Lower to Middle Linxi Period and continental deposits in the Upper Linxi Period. However, in this study, large numbers of bryozoan and sponge spicule fossils were discovered for this first time in the thick limestone layers and lenses of the upper part of the Linxi Formation found in the Guandi section of Linxi county in eastern Inner Mongolia. At the same time, abundant bryozoan fossils were also found in sedimentary tuff slices that were collected from the upper part of the Taohuayingzi Formation from the Taohuayingzi section in Ar Horqin Banner, and abundant small connecting body crinoid stem fossils were found in the dark shale of the Yangjiagou Formation from the Yangjiagou section of Jiutai county, Jilin Province. These marine fossils provide the first evidence that the Xingmeng area was still a marine or mainly marine environment at the end of the late Permian. This not only provides conclusive evidence for the recognition of the above two major geological issues but also promotes changes in the approach towards research, exploration and development of oil and gas, shale gas (oil), and other mineral resources that are preserved in the late Permian layers of the Northeast-Xingmeng area.
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影响因子：
3
作者：
Zhong‐Qiang Chen;G. Shi
通讯作者：
Zhong‐Qiang Chen;G. Shi
影响因子：
--
作者：
Wang Jun-tao
通讯作者：
Wang Jun-tao
DOI：
10.2517/prpsj.10.261
发表时间：
2006-09
期刊：
--
影响因子：
--
作者：
M. Ehiro
通讯作者：
M. Ehiro
DOI：
10.2517/prpsj.9.1
发表时间：
2005-04
期刊：
--
影响因子：
--
作者：
M. Ehiro;A. Misaki
通讯作者：
M. Ehiro;A. Misaki
影响因子：
--
作者：
Zeng Yan-tao
通讯作者：
Zeng Yan-tao