| 山东淄博地区奥陶系层序地层划分和层序界面的识别标志 |
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| 引用本文： | 陈建强,胡树庭,杨欣德.山东淄博地区奥陶系层序地层划分和层序界面的识别标志[J].现代地质,2001,15(3):247-253,T001. |
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| 作者姓名： | 陈建强 胡树庭 杨欣德 |
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| 作者单位： | 1. 中国地质大学地球科学与资源学院
2. 山东省地质调查研究院 |
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| 基金项目： | 科技部“九五”攀登计划专项"中国层序地层、地球节律和古大陆再造研究”(95-专-04);国家重点基础研究发展规划项目"中国典型叠合盆地油气形成富集与分布预测”(G1999043304);原地质矿产部"1∶5万文祖、淄川幅区域地质调查项目(层序地层应用试点图幅)”. |
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| 摘 要： | 研究区为华北地台东部奥陶系发育最全的地区之一。区内出露下、中奥陶统 (两河口阶至宝塔阶 ,时限 4 95～ 4 4 5Ma)。岩石地层划分为三山子组和马家沟组。通过对野外剖面系统的观测 ,按碳酸盐岩台地层序地层的研究方法 ,识别出区内奥陶系 8个三级层序 (OSq1-OSq8)和 4种层序界面标志。平均每个三级层序延限约 6Ma ,OSq1由三山子组B段 (TST)和A段 (HST)组成。马家沟组含东黄山段、北庵庄段、土峪段、五阳山段、阁庄段、八陡段和新汶段。东黄山段至土峪段含 2个层序 (OSq2和OSq3 )。五阳山段和阁庄段包含 3个层序(OSq4 -OSq7)。八陡段 (TST)和新汶段 (HST)组成最上部一个层序 (OSq8)。通过与河北唐山等地区同期地层的对比 ,提出华北地台下、中奥陶统 (两河口阶至宝塔阶 )可划分为 11个三级层序 ,探讨了华北地台下、中奥陶统层序差异性的可能的控制因素。
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| 关 键 词： | 层序地层 层序界面标志 奥陶系 海平面变化 淄博地区 山东 |
| 文章编号： | 1000-8527(2001)03-0247-07 |
ORDOVICIAN SEQUENCE STRATIGRAPHY AND THE SEQUENCE BOUNDARY MARKS OF ZIBO,SHANDONG
PROVINCE |
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| CHEN Jian qiang ,HU Shu ting ,YANG Xin de.ORDOVICIAN SEQUENCE STRATIGRAPHY AND THE SEQUENCE BOUNDARY MARKS OF ZIBO,SHANDONG
PROVINCE[J].Geoscience——Journal of Graduate School,China University of Geosciences,2001,15(3):247-253,T001. |
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| Authors: | CHEN Jian qiang HU Shu ting YANG Xin de |
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| Institution: | CHEN Jian qiang 1,HU Shu ting 2,YANG Xin de 1 |
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| Abstract: | The study region,with good Lower and Middle Ordovician sections, is located on the eastern Sino Korea Platform. On the basis of detailed outcrop analysis of two sections and geological mapping in the region, this paper establishes eight 3rd order sequences from the Lower and Middle Ordovician, corresponding Lianghekou Stage to Baota Stage, including the Sanshanzi Formation and the Majiagou Formation. The Sanshanzi Formation is subdivided into the Member A and the Member B. The Majiagou Formation is subdivided into the Donghuangshan, Beianzhuang, Tuyu, Wuyangshan, Gezhuang, Badou, and Xinwen members. The first sequence (OSq1) consists of the Member A and the Member B of the Sanshanzi Formation,extending chronologically from the Lianghekou Stage to the Honghuayuan Stage. The Donghuangshan, Beianzhuang, and Tuyu members of the Majiagou Formation have constituted two 3rd order sequences, namely sequence OSq2 and OSq3.Three 3rd order sequences have been recognized in the Wuyangshan Member and the Gezhuang Member of the Majiagou Formation. The last sequence, namely sequence OSq8, is represented by the Badou Member and the Xinwen Member of the Majiagou Formation. Based on correlation with the Ordovician sections of the Tangshan, Hebei Province, altogether 11 third order sequences, from the Lianghekou to Baota stages, are recognized on the Sino Korea Platform. The mainly controlled facts of the difference of the Lower and Middle Ordovician sequence number between the Zibo area and the Tangshan area are discussed. |
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| Keywords: | sequence stratigraphy sequence boundary mark Ordovician sea level change Zibo area Shandong Province |
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