| 泌阳凹陷核桃园组微量元素演化特征及其古气候意义 |
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| 引用本文： | 王随继,黄杏珍.泌阳凹陷核桃园组微量元素演化特征及其古气候意义[J].沉积学报,1997,15(1):65-70. |
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| 作者姓名： | 王随继 黄杏珍 |
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| 作者单位： | 1 北京大学城市与环境学系, 北京 100871; |
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| 摘 要： | 泌阳凹陷下第三系核桃园组总体上表现为一个大的湖退体系，而其中的微量元素含量及有关元素比值却呈现出细微而明显的旋回变化特征。本文依据泥岩、页岩和碳酸盐岩中Ｔｉ、Ｓｒ、Ｂａ等十六种微量元素含量及Ｓｒ/Ｂａ、Ｆｅ/Ｍｎ、Ｓｒ/Ｃｕ等七种比值的变化特征，结合古盐度及岩相资料，对核桃园组沉积时的古气候作了系统的研究，基本上分出了温暖潮湿、干湿交替、炎热干旱、温热半干旱四类较为特征的古气候类型，以期为油气勘探提供依据。
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| 关 键 词： | 泌阳凹陷 核桃园组 微量元素及其比值 古气候 |
| 收稿时间： | 1995-10-27 |
Evolutional Characteristics and Their Paleoclimate Significance of Trace Elements in the Hetaoyuan Formation, Biyang Depression |
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| Wang Suiji Huang Xingzhen Tuo Jincai Shao Hongshun,Yan Cunfeng Wang Shouqing and He Zurong.Evolutional Characteristics and Their Paleoclimate Significance of Trace Elements in the Hetaoyuan Formation, Biyang Depression[J].Acta Sedimentologica Sinica,1997,15(1):65-70. |
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| Authors: | Wang Suiji Huang Xingzhen Tuo Jincai Shao Hongshun Yan Cunfeng Wang Shouqing and He Zurong |
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| Institution: | Department of Geography Peking University Beijing 100871 |
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| Abstract: | The Hetaoyuan Formation in the Tertiary Biyang depression is completely a lacustrine regressive system, but it has some microcyclic variations in microfacies during evolution. These characteristics can be shown obviously from the abundance of trace elements and their ratios. Based on variation characters of concents of 16 trace elements such as Ti, Sr, Nb, Ba, etc. and 7 trace elements ratios such as Sr/Ba, Fe/Mn, Mg/Ca, etc. obtained from mudstones, shales and carbonates, and in terms of some data such as paleosalinity and lithofacies, this paper made a systematical study of paleoclimate under which the Hetaoyuan Formation was deposited. As a result, four characteristic paleoclimate types can be grouped, i.e., temperate humid, dry humid alternation, hot dry and humid semiarid. It is hoped that this result can provide some clues for the petroleum and gas exploration in the Biyang depression. |
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| Keywords: | trace element abundance paleoclimate Biyang depression Hetaoyuan formation |
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