柴达木盆地东部尕海湖DG03孔岩芯粒度特征及环境意义

摘要/Abstract

摘要： 对柴达木盆地东部尕海湖DG03孔岩芯沉积物的粒度特征的研究,结果表明:在12 800—11 800 cal a BP之间,DG03孔沉积物主要以砂为主,含少量的粉砂和粘土,表明钻孔地点的水动力条件比较强,湖泊水位较低,尕海地区经历了一次短暂的干旱事件,这一事件可能是该区域对全球性的YD事件的响应;全新世早中期（11 800—5 600 cal a BP）,沉积物主要以粉砂和粘土为主,钻孔地点的水动力条件比较弱,湖泊水位较高,气候环境相对湿润;全新世中晚期以来（5 600 cal a BP以来）,沉积物中砂粒组分含量越来越多,粉砂和粘土含量越来越少,平均粒径越来越大,钻孔地点的水动力越来越强,该区域经历了一个干旱化的过程。

关键词: 尕海, 湖泊沉积物, 粒度, 环境变化

Abstract:

The research on the grain size characteristics of DG03 core from Gahai Lake, which located in the east of Qaidam Basin, has got the following indications: during 12 800—11 800 cal a BP, the sediment of DG03 Core is mainly composed of grit, containing a little fine sand and clay and this proved that the condition of water power were strong and water level was comparatively low. Perhaps Gahai Lake area experienced a short drought event, which was maybe the response of the global YD event; in the period of 11 800—5 600 cal a BP, the sediment is mainly composed of fine sand and clay, and this proved that the water power condition of this sediment environment was weak and the water level was comparatively high. Relatively speaking, the climate of this period was wet. Since 5 600 cal a BP, the component has had more and more grit with bigger and bigger diameter while less and less fine sand and clay. This proved that the water power at this site was stronger and stronger and experienced a process of drought.

Key words: Gahai Lake, lacustrine sediment, grain size, environment change

中图分类号:

P532

曹广超;;马海州;隆浩;陈忠;张西营;周笃筠. 柴达木盆地东部尕海湖DG03孔岩芯粒度特征及环境意义[J]. 中国沙漠, 2008, 28(6): 1073-1077.

CAO Guang-chao;;MA Hai-zhou;LONG Hao;CHENG Zhong;ZHANG Xi-ying;ZHOU Du-jun. Particle Size Characteristics of Deposits from DG03 Core of Gahai Lake in East of Qaidam Basin and Their Environmental Significance[J]. JOURNAL OF DESERT RESEARCH, 2008, 28(6): 1073-1077.

参考文献

[1]王苏民,张振克.中国湖泊沉积与环境演变研究的新进展[J].科学通报,1999,4：579-587.
[2]An Z S,Porter S C,Kutzbach J E,et al.Late quaternary dust flow on the Chineseloess plateau [J].Catana,1991,18:125-132.
[3]Ding Z L,Yu Z W,Rutter N W,et al.Towards an orbital time scale for Chineseloess deposits[J].Quaternary Science Reviews,1994,13:39-70.
[4]鹿化煜,安芷生.洛川黄土粒度组成的古气候意义[J].科学通报,1997,42(1):66-69.
[5]李保生,高全洲,阎满存,等.150 ka BP以来巴丹吉林沙漠东南区域地层序列的新研究[J].中国沙漠,2005,25(4):457-465.
[6]钟巍,塔西甫拉提·特依甫,王立国,等.塔里木盆地南缘历史时期气候环境变化的过程与特征[J].中国沙漠,2004,24(3):261-267.
[7]张洪,靳鹤龄,苏志珠,等.全新世浑善达克沙地粒度旋回及其反映的气候变化[J].中国沙漠,2005,25(1)：2－7.
[8]贾铁飞,银山,何雨,等.乌兰布和沙漠东海子湖全新世湖相沉积结构分析及其环境意义[J].中国沙漠,2003,23(2)：165－170.
[9]陈惠中,金炯,董光荣.全新世古尔班通古特沙漠演化和气候变化[J].中国沙漠,2001,21(4)：333－339.
[10]Bianchi G G, McCave I N. Holocene periodicity in North Atlantic climate and deep-ocean flow south of Iceland[J].Nature,1999,397:515-517.
[11]陈敬安,万国江,唐德贵,等.洱海近代气候变化的沉积物粒度与同位素记录[J].自然科学进展,2000,10(3):253-259.
[12]孙千里,周杰,肖举乐.岱海沉积物粒度特征及其古气候意义[J].海洋地质与第四纪地质,2001,21（1）：93-95.
[13]陈敬安,万国江,张峰,等.不同时间尺度下的湖泊沉积物环境纪录——以沉积物粒度为例[J].中国科学:D辑,2003,33(6):563-568.
[14]段水强,吴秀琴. 德令哈盆地水资源潜力开发分析[J].青海科技,2005,12(2):13-15.
[15]郑喜玉,张明刚,徐昶,等.中国盐湖志[M] . 北京:科学出版社,2002:173-174.
[16]杜进新.尕海湖卤虫减少原因及保护对策[J]. 柴达木开发研究,2001(2):25-27.
[17]成都地质学院陕北队.沉积岩（物）粒度分析及其应用[M].北京：地质出版社,1978:1-54.
[18]陈忠,马海州,曹广超,等.尕海地区晚冰期以来沉积记录的气候环境变化[J].海洋地质与第四纪地质,2007,27(1):131-138.
[19]张西营,马海州,韩风清,等.德令哈盆地尕海湖DG03孔岩芯矿物组合与古环境变化[J].沉积学报,2007,25(5):767-773.
[20]沈吉,刘兴起,Matsumoto R,等.晚冰期以来青海湖沉积物多指标高分辨率的古气候演化[J].中国科学:D辑,2004,34（6）：582-589.
[21]Xiao J L,Xu Q H,Nakamura T,et al.Holocene vegetation variation in the Daihai Lake region of north-central China:a direct indication of the Asian monsoon climatic history[J].Quaternary Science Reviews,2004,23:1669-1679.
[22]隆浩,王乃昂,李育,等.猪野泽记录的季风边缘区全新世中期气候环境演化历史[J].第四纪研究,2007,27（3）：371-381.