地理科学 ›› 2018, Vol. 38 ›› Issue (6): 987-996.doi: 10.13249/j.cnki.sgs.2018.06.019

• • 上一篇    

西藏南羌塘盆地重要湖盆孢粉组合与环境意义

赵淼(), 张文卿, 蔡五田, 李颖智, 耿婷婷, 张涛, 张智印, 张学敏   

  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;
    四川省地矿局九一五水文地质工程地质队,四川 眉山 620020
  • 收稿日期:2017-07-09 修回日期:2017-11-09 出版日期:2018-06-20 发布日期:2018-06-20
  • 作者简介:

    作者简介:赵淼(1988-),女,吉林长春人,工程师,主要研究方向为第四纪地质与环境演变。E-mail:494136150@qq.com

  • 基金资助:
    中国地质调查局地质调查项目(12120113038200,12120114059601,DD20160298)资助

Sporopollen Combination in Southern Qiangtang Basin and Environment Significance

Miao Zhao(), Wenqing Zhang, Wutian Cai, Yingzhi Li, Tingting Geng, Tao Zhang, Zhiyin Zhang, Xuemin Zhang   

  1. China Geological Survey of Hydrological Geology Environmental Geological Survey Center, Baoding 071051, Hebei, China;
    Nine One Five Hydrogeologic & Engineering Geology Briage of Sichuan Bureau of Geology & Mineral Resources, Meishan 620020, Sichuan, China
  • Received:2017-07-09 Revised:2017-11-09 Online:2018-06-20 Published:2018-06-20
  • Supported by:
    Geological Survey Project of China Geological Survey (12120113038200,12120114059601,DD20160298)

摘要:

对南羌塘盆地内流湖盆区多个湖盆晚更新世—全新世地层孢粉组合进行分析,采用蒿属(Artemisia)与藜科(Chenopodiaceae)比值(A/C值)和麻黄(Ephedra)、藜科、蒿属含量变化趋势分析,恢复了该地区的植被与气候变化特征,总结了3个钻孔和区域上湖盆环境干湿度变化规律:扎仓茶卡湖盆南侧、搭拉不错湖盆南侧,呈针阔叶混交森林草原植被,气候总体温暖湿润;别若则错湖盆西侧,呈针阔叶混交疏林植被,气候总体较寒冷干燥。区域上由西向东干燥程度逐渐加强,佐证了通过孢粉组合分析得出的气候变化特征。此次成果对南羌塘盆地湖盆区气候演变趋势具有重要的研究意义。

关键词: 南羌塘盆地, 内流湖盆, 孢粉组合, 气候, 干燥程度

Abstract:

Based on the sporopollen analysis of the Late Pleistocene-Holocene lacustrine strata in multiple lake basin of the southern Qiangtang region, using A/C value and ephedra, chenopodiaceae, Artemisia’s amount change trend, this article presents the vegetation and climate change of the aera and summarized the variation of dry humidity in three boreholes and basins: the south of Zha Cang Cha Ka basin and Da La bu Cuo Basin were Needle broadleaf mixed forest grassland vegetation and the climate was warm and moist. The west of bie ruo ze cuo basin was Needle broadleaf mixed forest vegetation and the climate was cold and dry. The dry degreeis gradually increased from west to east and provide demonstration for climate change. The results obtained from this article have an important significance for the study of the climate change trend in southern Qiangtang Basin.

Key words: Southern Qiangtang Basin, flow within the lake basin, pollen combination, climate, degree of drought

中图分类号: 

  • P66