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干旱区地理 ›› 2015, Vol. 38 ›› Issue (1): 90-94.

• 地表过程研究 • 上一篇    下一篇

罗布泊地区晚第四系介形类分布特征及环境分析

王建中1，杨振京1，林防1，毕志伟1，林景星2，张冰1，刘畅1，3   

  1. （1    中国地质科学院水文地质环境地质研究所， 河北    石家庄    050061；2    中国地质科学院地质研究所， 北京    100037；    3    石家庄经济学院， 河北    石家庄    050031）
  • 收稿日期:2014-04-01 修回日期:2014-06-27 出版日期:2015-01-25
  • 通讯作者: 杨振京（1966-），男，研究员，博士（后）,主要从事第四纪地质与环境演变研究. Email：yangzhenjing1966@163.com
  • 作者简介:王建中（1955-），男，副研究员，主要从事区域地质、环境地质研究
  • 基金资助:

    国土资源大调查地质调查项目（200312300002）；国家自然科学基金项目（40972212）

Late Quaternary Ostracods distribution and environmental analysis of Lop Nur Region

WANG  Jian-zhong1，YANG  Zhen-jing1，LIN  Fang1，BI  Zhi-wei1，LIN  Jing-xing2，ZHANG  Bing1，LIU  Chang1，3   

  1. （1   The Institute of Hydrogeology and Environmental Geology, Shijiazhuang  050061, Hebei, China;   2   Institute of Geology Chinese Academy of Geological Sciences, Beijing  100037, China;   3   Shijiazhuang University of Economics, Shijiazhuang  050031, Hebei, China）
  • Received:2014-04-01 Revised:2014-06-27 Online:2015-01-25

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摘要： 通过对新疆罗布泊地区地层剖面中的介形类分布及其组合特征的分析，在剖面中发现有14属31种介形类化石，划分出两个化石组合层段。第一层段以Limnocythere sanciti-patricii为组合特征，代表沉积环境为湖相，根据14C年龄，此层段的沉积年龄在20 870～14 770 a BP。第二层段以Cyprideis littoralis和Darwinula stevensoni为组合特征，代表咸水—半咸水湖相沉积环境，根据14C测年，地层沉积年龄约30 000 a BP。

关键词: 罗布泊, 晚第四系, 介形类, 环境信息

Abstract: The ideal indexes to analyze paleoenvironment that reflect the environmental changes are the abundance and variation of differentiation degree of ostracods in the strata. If the climatic environment is warm and the temperature and depth of water are suitable，the abundance and variation of differentiation degree of ostracods are higher. On the contrary，if the climatic is cold and the environment of the water is bad，the abundance and variation of differentiation degree of ostracods are lower. Besides，some ostracods themselves are good facies fossil，for example，some ostracods are halo tolerant，some are euryhaline and some ostracods could not live in salt water. Therefore，on the basis of the distribution features of the ostracods in the stratigraphic section the conjecture to sedimentary environment of the time is viable. Through the analysis of ostracoda distribution and combination feature in Lop Nor stratigraphic section，in the stratigraphic section found 14 Genus 31 species of ostracoda fossils，divided into two fossil assemblage zones. The first zone is characterized by Limnocythere sanciti-patricii，representatives of the lacustrine sedimentary environment. According to 14C age，the age of this zone is deposited in 20 870-14 770 a BP. The second zone is characterized by Cyprideis littoralis-Darwinula stevensoni，representatives of salt water-brackish lake sedimentary environment. According to 14C dating，the age of this zone is about 30 000 a BP. 搜索 #zCugEpngjSTips { Z-INDEX: 999999999; POSITION: absolute; WIDTH: 56px; HEIGHT: 24px; LEFT: 1342177.27em } #zCugEpngjSTips A { POSITION: relative; LINE-HEIGHT: 24px; MARGIN: -32px 0px 0px; PADDING-LEFT: 23px; WIDTH: auto; DISPLAY: block; BACKGROUND: url(http://mat1.gtimg.com/www/sogou/sogou_tips_v1.png) no-repeat 0px 0px; HEIGHT: 24px; COLOR: #000; FONT-SIZE: 12px; TEXT-DECORATION: none } #zCugEpngjSTips A:hover { BACKGROUND-POSITION: 0px -34px; COLOR: #45a1ea }

Key words: Lop Nor, late quaternary system, Ostracoda, environmental information

中图分类号: 

  • P343.3