【摘要】：新疆柯坪地區(qū)印干組筆石及三葉蟲化石豐富,已做過較多的工作,但珊瑚化石未見報(bào)道。柯坪地區(qū)南部柯坪塔格山一帶出露完整的印干組,該組頂部首次發(fā)現(xiàn)富含珊瑚化石的厚層生物碎屑灰?guī)r,珊瑚經(jīng)鑒定計(jì)有9屬14種(含未定種)。該珊瑚動(dòng)物群中,Agetolites,Heliolites和Streptelasma最為豐富。根據(jù)珊瑚動(dòng)物群特征、垂向變化規(guī)律及與鄰區(qū)的對(duì)比,建立了Agetolites-Heliolites-Streptelasma生物組合。就生物組合特征而言,該組合可與浙贛地區(qū)三巨山組、準(zhǔn)噶爾北部布龍果爾組對(duì)應(yīng),時(shí)代屬晚奧陶世錢塘江早期,對(duì)應(yīng)國際凱迪期晚期。就生物古地理特征而言,該動(dòng)物群分子大部分見于華南地區(qū),屬中國南方的阿蓋特珊瑚區(qū),表明該區(qū)當(dāng)時(shí)與華南相連。
[Abstract]:There are abundant fossils of graptolites and trilobites in the Yingan formation in Keping, Xinjiang, and more work has been done, but the coral fossils have not been reported. A complete Ingan formation appeared in the area of Kepingtag Mountain in the south of Keping area. The thick layer bioclastic limestone rich in coral fossils was first found on the top of the group. There are 9 genera and 14 species (including undetermined species) of corals. Among the coral fauna, Agetolitesus Heliolites and Streptelasma are the most abundant. According to the characteristics of coral fauna, vertical variation and comparison with adjacent areas, the Agetolites-Heliolites-Streptelasma bioassemblage was established. In terms of biological assemblage characteristics, the combination can correspond to Sanjiushan formation in Zhejiang and Jiangxi area and Bronggoer formation in northern Junggar, which belongs to the early late Ordovician Qiantang River and corresponds to the late international Keti period. In terms of biogeographic characteristics, most of this fauna was found in southern China, which belongs to the Argett coral region in southern China, indicating that the area was connected with South China at that time.
【作者單位】： 中國人民武裝警察部隊(duì)黃金第七支隊(duì);中國地質(zhì)大學(xué)(武漢);蘭州大學(xué)地質(zhì)科學(xué)與礦產(chǎn)資源學(xué)院;蘭州大學(xué)甘肅省西部礦產(chǎn)資源重點(diǎn)實(shí)驗(yàn)室;
【基金】：中國地質(zhì)調(diào)查局西北沿邊及特殊地區(qū)地質(zhì)礦產(chǎn)調(diào)查二級(jí)項(xiàng)目(DD20160079)
【分類號(hào)】：Q915.2
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本文編號(hào)：2155461