| 大庆中央拗陷区早二叠世腕足动物群的发现及其地层意义 |
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| 引用本文： | 廖卓庭,万伟彪.大庆中央拗陷区早二叠世腕足动物群的发现及其地层意义[J].地质学报,2002,76(1):50-54. |
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| 作者姓名： | 廖卓庭 万伟彪 |
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| 作者单位： | 1. 中国科学院南京地质古生物研究所,210008
2. 大庆油田有限责任公司勘探开发研究院,黑龙江安达,163712 |
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| 摘 要： | 位于大庆中央拗陷区腹部的杜101井，在1700余米井下，首次发现保存完好的腕足类等多门类化石，经研究确认：腕足动物群属于天山-兴安沉积区早二叠世广泛分布的北山类群。从而肯定了大庆探区大面积中新生界之下存在正常沉积的海相下二叠统，说明松辽盆地北部盆地的基底为海西期浅层褶皱基底。这一发现不仅对松辽盆地二叠纪构造与生物古地理变迁机制等理论问题的深入研究有重要意义，也对大庆探区开展深部油气勘探，寻找新的油气接替层位提供了实际依据，应引起有关方面的重视。
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| 关 键 词： | 大庆探区 深部勘探 早二叠世 腕足动物群 变迁机制 生物古地理 |
| 修稿时间： | 2001年3月12日 |
Discovery of an Early Permian Brachiopod Fauna in the Central Depression of the Daqing Prospect Area and Its Stratigraphic Significance |
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| LIAO Zhuoting,WAN Chuanbiao Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing, Research Institute of Exploration and Development,Daqing Oilfield Company of Limited Liability,Daqing,Heilongjiang.Discovery of an Early Permian Brachiopod Fauna in the Central Depression of the Daqing Prospect Area and Its Stratigraphic Significance[J].Acta Geologica Sinica,2002,76(1):50-54. |
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| Authors: | LIAO Zhuoting WAN Chuanbiao Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing Research Institute of Exploration and Development Daqing Oilfield Company of Limited Liability Daqing Heilongjiang |
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| Abstract: | Well preserved brachiopods and other taxonomically diverse fossils have been for the first time found from a depth of more than 1700 m of the Durbod 101 borehole in the interior of the central depression of the Daqing prospect area. Study of these fossils have affirmed that those brachiopods belong to the Beishan type group widespread in the Tianshan-Hinggan depositional region during the Early Permian, thus making certain that the normally deposited marine Lower Permian does exist beneath the extensive Mesozoic strata in the Daqing prospect area and showing that the basement of the northern part of the Songliao basin is the Hercynian shallow folded basement. This discovery not only has great significance in the in-depth study of the mechanism of the basement structure and biopalaeogeographic changes as well as other theoretical problems, but also provides ac-tual evidence for the development of deep hydrocarbon exploration in the Daqing prospect area and the search for the follow-up hydrocarbon horizons. Therefore, the departments concerned should pay attention to hydro-carbon exploration of Upper Paleozoic strata. |
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| Keywords: | Daqing prospect area deep exploration Early Permian brachiopod basin basement |
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