赵淼^1,,
张文卿¹,
蔡五田¹,
陈天红²,
秦天²,
毛磊²
1. 中国地质调查局水文地质环境地质调查中心, 河北 保定 071051
2. 中国人民武装警察部队黄金第四支队, 辽宁 辽阳 111000

基金项目: 中国地质调查局地质调查项目（批准号：12120113072500和DD20160240）资助


详细信息

作者简介: 赵淼, 女, 30岁, 工程师, 第四纪地质研究, E-mail:494136150@qq.com

中图分类号: P534.61;Q913.84

收稿日期:2018-02-11
修回日期:2018-06-20
刊出日期:2018-11-30

Palynological assemblages of borehole ZK001 in Manite depression of Erlian basin and discussion of the stratigraphy and climate evolution

Zhao Miao^1,,
Zhang Wenqing¹,
Cai Wutian¹,
Chen Tianhong²,
Qin Tian²,
Mao Lei²
1. Center for Hydrogeology and Environmental Geology Survey, China Geological Survey, Baoding 071051, Hebei
2. The Fourth Team of Gold of the Chinese Armed Police Force, Liaoyang 111000, Liaoning


MSC: P534.61;Q913.84

--> Received Date: 11 February 2018
Revised Date: 20 June 2018
Publish Date: 30 November 2018


摘要
摘要:通过对二连盆地马尼特坳陷ZK001钻孔（地理坐标为44°48'44″N，114°44'44″E；深度260.00 m）44个孢粉土样分析，自下而上划分为4个孢粉组合带：深度260.00~235.21 m为Pinuspollenites-Cicatricosisporites-Lycopodiaceae-Pilosisporites-Triletes，深度235.21~176.00 m为Pinuspollenites-Piceaepollenites-Chenopodipollis-Artemisiaepollenites-Cicatricosisporites-Triletes，深度176.00~84.56 m为Pinuspollenites-Chenopodipollis-Artemisiaepollenites-Triletes-Lycopodiaceae，深度84.56~15.60 m为Pinuspollenites-Chenopodipollis-Artemisiaepollenites-Triletes。依据孢粉分析结果并结合沉积环境，将研究区植被演替和古气候演化划分为两个阶段：深度260.00~84.56 m孢粉组合特征代表了针阔叶混交林-草原植被类型，反映了气候由温热湿润—温暖湿润—温暖干燥的变化趋势；深度84.56~15.60 m孢粉组合特征代表了疏林草原植被类型，反映温凉干旱气候。对比分析区域孢粉组合及地层岩性，探讨了研究区地层时代。研究结果表明：深度260.00~84.56 m地层为早白垩世大磨拐河组（K₁d），深度84.56~15.60 m地层为古近纪伊尔丁曼哈组（Ey）。此次研究对马尼特坳陷古近纪与白垩纪界限划分具有重要意义，为古气候环境变化提供新的论证。
关键词: 二连盆地/
大磨拐河组/
早白垩世/
伊尔丁曼哈组/
孢粉带/
古气候/
地层时代

Abstract:By the analysis of 44 soil samples at the borehole ZK001 (44°48'44″N, 114°44'44″E, the depth of 260.00 m)in the Manite depression, Erlian basin, four palynological assemblages are recognized from the bottom to the top. These four assemblages are named as Pinuspollenites-Cicatricosisporites-Lycopodiaceae-Pilosisporites-Triletes (depth of 260.00 m to 235.21 m), Pinuspollenites-Piceaepollenites-Chenopodipollis-Artemisiaepollenites-Cicatricosisporites-Triletes (depth of 235.21 m to 176.00 m), Pinuspollenites-Chenopodipollis-Artemisiaepollenites-Triletes-Lycopodiaceae (depth of 176.00 m to 84.56 m), Pinuspollenites-Chenopodipollis-Artemisiaepollenites-Triletes (depth of 84.56 m to 15.60 m), respectively. According to the results of sporopollen analysis and sedimentary lithology, vegetation succession and paleoclimate evolution in the studying area has been divided into two stages. At the depth of 260.00 m to 84.56 m, the characteristics of palynological assemblage represent the coniferous and broad-leaved mixed forest-grassland vegetation type, which reflects the climate changes from hot-humid, warm-humid to warm-arid. At the depth of 84.56 m to 15.60 m, the features of palynological assemblage represent the vegetation of sparse forest grassland type, which reflects cold-arid climate. The stratigraphic age in borehole of the research area has been discussed by comparing the characteristic of the palynological assemblages and formation lithology in adjacent areas. The results show that the layer can be defined as Early Cretaceous Damoguaihe Formation (K₁d) between 260.00 m and 84.56 m and Paleogene Irdin Manha Formation (Ey) between 84.56 m and 15.60 m. This study has great significance for the division of Paleogene and Cretaceous, which provides a new demonstration for the paleoclimate changes.
Key words:Erlian basin/
Damoguaihe Formation/
Early Cretaceous/
Irdin Manha Formation/
palynological assemblages/
paleoclimate/
stratigraphic age



PDF全文下载地址:

http://www.dsjyj.com.cn/data/article/export-pdf?id=dsjyj_11551