| 大兴安岭北部地区晚侏罗世-早白垩世地层划分有关问题的讨论 |
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| 引用本文： | 邵积东 王惠[,] 安存杰 徐宗培[,].大兴安岭北部地区晚侏罗世-早白垩世地层划分有关问题的讨论[J].地层学杂志,2005,29(11):573-578. |
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| 作者姓名： | 邵积东 王惠[ ] 安存杰 徐宗培[ ] |
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| 作者单位： | [1]内蒙古自治区地质调查院,内蒙古呼和浩特010020 [2]中国地质大学,北京100083 |
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| 基金项目： | 中国地质调查局区域地质调查项目（No.199913000206,200213000023,200313000032）. |
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| 摘 要： | 根据地层分布、岩石组合、古生物特征，对近几年在大兴安岭北部地区完成的区域地质调查图幅中存在的晚侏罗世一早白垩世火山岩地层划分混乱的问题进行了整理、提出了新的划分意见：将光华组修订为大兴安岭北部含Eosestheria动物群的大套酸性火山岩，时代为早白垩世；含有Nestoria动物群的大套酸性火山岩为上侏罗统白音高老组；两大套酸性火山岩之间超覆于其他老地层之上的含Eosestheria动物群的中酸性火山岩为下白垩统龙江组；龙江组底部的不整合是该区侏罗系与白垩系的界线。
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| 关 键 词： | 大兴安岭 内蒙古 岩石地层 晚侏罗世 早白垩世 |
| 收稿时间： | 07 25 2005 12:00AM |
| 修稿时间： | 09 12 2005 12:00AM |
A DISCUSSION ON THE LATE JURASSIC-EARLY CRETACEOUS STRATIGRAPHIC DIVISION OF THE NORTHERN AREA OF THE DA HINGGAN MOUNTAINS |
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| SHAO Ji-dong , WANG Hui, AN Chun-jie , XU Zong-pei.A DISCUSSION ON THE LATE JURASSIC-EARLY CRETACEOUS STRATIGRAPHIC DIVISION OF THE NORTHERN AREA OF THE DA HINGGAN MOUNTAINS[J].Journal of Stratigraphy,2005,29(11):573-578. |
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| Authors: | SHAO Ji-dong WANG Hui AN Chun-jie XU Zong-pei |
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| Institution: | 1.Geological Survey Institute of Inner Mongolia, Huhhot, 010020; 2. China University of Geosciences, Beijing, 100083 |
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| Abstract: | Based on the stratigraphic distribution, rock association, and paleontologic features, a discussion has been carried out on the confusion as to the stratigraphic division of the Late Jurassic--Early Cretaceous volcanic rocks in the geological survey of the northern area of the Da Hinggan Mountains finished in latest years and a new plan for division has been proposed as follows., the Guanghua Formation is modified as the Eosestheria-bearing acid volcanic rock of the northern area of the Da Hinggan Mountions, its age being Early Cretaceous; Nestoria-bearing acid volcanic rocks as the Late Jurassic Yinggaolao Formation; Eosestheria-bearing neutral-acid volcanic rocks between the above-mentioned two suites of acid volcanic rocks and overlapping other older strata as the Lower Cretaceous Longjiang Formation; the basal unconformable boundary is the Jurassic-Cretaceous boundary of this area. |
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| Keywords: | Cretaceous Jurassic stratigraphy Da Hinggan Mountains Inner Monglia |
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