| 辽宁岫岩县偏岭地区晚大石桥期沉积环境及构造古地理 |
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| 引用本文： | 项才,陈跃月,曹洪亮,刘敏.辽宁岫岩县偏岭地区晚大石桥期沉积环境及构造古地理[J].地质与资源,2008,17(3):166-169. |
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| 作者姓名： | 项才 陈跃月 曹洪亮 刘敏 |
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| 作者单位： | 辽宁省地质矿产研究院, 辽宁 沈阳 110032 |
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| 摘 要： | 偏岭地区大石桥组三段自下而上分为6个岩性层，每层都有不同的岩性组合特征.碳酸盐岩的CaO/MgO比值具有指示沉积环境的作用.通过分析该段地层的岩性组合特征，并结合不同层位的CaO/MgO比值，推断出偏岭地区在晚大石桥期的沉积环境演变过程为干旱湖、封闭海湾→开阔浅海→滨海→干旱湖、封闭海湾→浅海（偶为潮间或滨岸）→滨海、浅海交互环境.
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| 关 键 词： | 大石桥组三段 沉积环境 构造古地理 辽宁 |
| 收稿时间： | 2007-11-20 |
SEDIMENTARY ENVIRONMENT AND TECTONO-PALEOGEOGRAPHY OF THE PALEOPROTEROZOIC DASHIQIAO FORMATION IN EASTERN LIAONING |
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| XIANG Cai,CHEN Yue-yue,CAO Hong-liang,LIU Min.SEDIMENTARY ENVIRONMENT AND TECTONO-PALEOGEOGRAPHY OF THE PALEOPROTEROZOIC DASHIQIAO FORMATION IN EASTERN LIAONING[J].Geology and Resources,2008,17(3):166-169. |
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| Authors: | XIANG Cai CHEN Yue-yue CAO Hong-liang LIU Min |
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| Institution: | Liaoning Institute of Geology and Mineral Resources, Shenyang 110032, China |
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| Abstract: | The 3rd member of Paleoproterozoic Dashiqiao formation in Pianling,Xiuyan County,Eastern Liaoning can be subdivided into 6 lithologic layers,each of which has different characters of lithologic assemblage.The CaO / MgO ratio of carbonate rock is an indicator for sedimentary environment.With analysis on the characters of lithologic assemblage and the CaO / MgO ratio of each layer,it is inferred that the sedimentary environment of Late Dashiqiao age in Pianling area was evolved in the process of arid lagoon and closed bay -open shallow sea -shore -arid lagoon and close bay -shallow sea (occasionally intertidal zone or shore) -alternative of shore and shallow sea. |
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| Keywords: | the 3rd member of Dashiqiao formation sedimentary environment tectono-paleogeography Liaoning Province |
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