研究论文

星云湖表层沉积物矿物组成及其环境意义

  • 张子雄 ,
  • 刘本培 ,
  • 张世涛 ,
  • 冯庆来 ,
  • 宋学良
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  • 1.昆明理工大学地球科学系,云南 昆明 650093;2.中国地质大学地球科学学院,湖北 武汉 430074;3.云南省地质科学研究所,云南 昆明 650011
张世涛(1965-),男,云南文山人,高级工程师(博士),主要从事造山带地质学和现代高原湖泊研究.E-mail:taogezhang@hotmail.com

收稿日期: 2002-12-30

  修回日期: 2003-07-21

  网络出版日期: 2003-12-01

基金资助

云南省玉溪市环保局项目“星云湖底泥勘测”资助.

THE CHANGING OF MINERAL COMPOSITION AND ENVIRONMENTAL SIGNIFICANCE IN SURFACE SEDIMENTS OF XINGYUN LAKE

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  • 1.Faculty of Earth Sciences, Kunming University of Science and Technology, Kunming 650093,China;2.Faculty of Earth Sciences, China University of Geosciences, Wuhan  430074,China;3.Geology Institute of Yunnan Province, Kunming 650011,China

Received date: 2002-12-30

  Revised date: 2003-07-21

  Online published: 2003-12-01

摘要

星云湖表层沉积物中的矿物成分主要为粘土矿物、碳酸盐矿物、长英质矿物和铁矿物。从下往上方解石和石英具有消长变化规律,即从下往上方解石含量迅速增加,而石英含量则逐渐降低。这种规律性变化与沉积物中CaO和烧失量的变化具有明显的正相关性。它反映了近年来湖泊富营养化有加剧的趋势。星云湖表层沉积物矿物成分的垂向变化与环境变化的对比分析研究表明,沉积物中自生方解石含量的变化可以灵敏地指示湖泊环境变化,是环境变化研究中一个良好的环境替代指标。

本文引用格式

张子雄 , 刘本培 , 张世涛 , 冯庆来 , 宋学良 . 星云湖表层沉积物矿物组成及其环境意义[J]. 地球科学进展, 2003 , 18(6) : 928 -932 . DOI: 10.11867/j.issn.1001-8166.2003.06.0928

Abstract

Clay mineral, carbonate mineral, felsic mineral and ferreous mineral are essential mineral in surface sediments of the Xingyun Lake. From below to up, calcite and quartz have a eat and flow rule, i.e. the content of calcite increasing rapidly, and the content of quartz reducing gradually from below to up. The contents of calcite have an obvious positive pertinence as compard with CaO and LOI. These phenomena has shown that the productivity of lake has increased and that the reason that cause the content of calcite and CaO increase is eutrphication.The comparison of the change of mineral composition in vertical section with the environment change shows that the change of the content of autogeny calcite can show the environment change of lake delicacy, which is a good environmental pointer in the study of environment change.

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