| 云南鹤庆盆地HQ孔沉积特征与古环境变迁 |
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| 引用本文： | 蒋雪中,王苏民,羊向东.云南鹤庆盆地HQ孔沉积特征与古环境变迁[J].地质力学学报,1998,4(4):76-81. |
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| 作者姓名： | 蒋雪中 王苏民 羊向东 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所湖泊沉积与环境开放研究实验室, 南京 210008,中国科学院南京地理与湖泊研究所湖泊沉积与环境开放研究实验室, 南京 210008,中国科学院南京地理与湖泊研究所湖泊沉积与环境开放研究实验室, 南京 210008 |
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| 基金项目： | 自然科学基金资助项目(49572123);中国科学院重大项目(KZ951-A1-402-04)和国家科委攀登项目 |
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| 摘 要： | 本文依据沉积物的颜色、粒度、层理、岩性组合等特征，并参照磁性地层、磁化率、碳酸盐含量、总有机碳及碳氮比值等环境指标，初步建立云南鹤庆盆地约６００ｋａＢ Ｐ以来的古环境演化历史。研究表明，在大阶段上环境变化存在着两次明显的转型，这可能是与构造运动驱动有关。在剖面４．１ｍ处，约１４．２ｋａＢ Ｐ，湖盆被河流切开，导致环境指标突变。
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| 关 键 词： | HQ孔 沉积特征 古环境变迁 盆地 第四纪 |
| 收稿时间： | 1998/7/10 0:00:00 |
SEDIMENTARY CHARACTERISTICS AND CLIMATIC EVOLUTION OF CORE HQ IN HEQING BASIN YUNNAN PROVINCE |
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| JIANG Xuezhong,WANG Sumin and YANG Xiangdong.SEDIMENTARY CHARACTERISTICS AND CLIMATIC EVOLUTION OF CORE HQ IN HEQING BASIN YUNNAN PROVINCE[J].Journal of Geomechanics,1998,4(4):76-81. |
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| Authors: | JIANG Xuezhong WANG Sumin and YANG Xiangdong |
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| Institution: | Nangjing Institute of Geography and Limnology, Chinese Academy of Science, Nanjing 210008,Nangjing Institute of Geography and Limnology, Chinese Academy of Science, Nanjing 210008 and Nangjing Institute of Geography and Limnology, Chinese Academy of Science, Nanjing 210008 |
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| Abstract: | The environment evolution history of the Heqing Basin since 600 ka B P has been established based on the analysis of the colour,granularity,stratification and lithological assemblage of the sediments from the HQ core in combination with the study of the magnetic stratigraphy,susceptibility,content of carbonates,total organic carbon and the carbonlnitrogen ration of the sequence.There were two distinet tranformations of the enviroment connected to the tectonic movement.At a depth of 4.1m of the column,the lake basin was entrenched by rivers at about 14.2 ka B P,leading to a sudden change of the envionment. |
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| Keywords: | HQ core sedimentary characteristics palaeoenvironment evolution |
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