干旱区生态环境知识资源中心(Arid): 罗布泊AK1孔沉积物地球化学组成与古气候

Arid

	罗布泊AK1孔沉积物地球化学组成与古气候
其他题名	Pleoclimate and Geochemical Composition of AK1 Core Sediments in Lop Nur, Xinjiang
	王永 1; 赵振宏 2; 林景星 1
来源期刊	地球学报
ISSN	1006-3021
出版年	2004
卷号	25 期号:6 页码:653-658
中文摘要	通过对罗布泊东部阿奇克谷地中部AK1孔沉积物中易溶盐组分及氧化物特征的研究,综合沉积序列及岩性变化特征,初步分析了罗布泊阿奇克谷地晚第三纪以来的沉积环境及古气候演化.结果表明,阿奇克谷地第三纪晚期即开始出现咸化湖泊沉积,易溶盐以SO42-、Cl-、Na+为主,各离子含量最高;第四纪以来沉积环境与古气候均有明显变化,早更新世气候以干冷为主,中更新世易溶盐组分中各离子浓度明显降低,以Cl-降低最显著,气候转为温湿;中更新世晚期气候湿润,湖相沉积范围扩大,为罗布泊湖的一次大发展期;晚更新世以来湖泊环境波动变化加快,气候向干旱化发展.表层易溶盐浓度显著增大,出现岩盐沉积,代表罗布泊出现极端干旱的气候环境。
英文摘要	A study of soluble salt and oxide content of Akl core sediments in eastern Aqike depression of Lop Nur area indicates that the Aqike depression has been a saline lake since Late Tertiary. Due to the presence of high percentages of SC%~~ , Cl" and Na+ , the lower part of Akl core (Late Tertiary) sediments generally contain higher soluble salts than Early Quaternary sediments. The middle part of the core sediments has lower content of soluble salts, especially Cl" and Na+ , and has predominantly SQi~ and Ca2+ ions, in-dicating a wet and warm climate condition. The upper part of the strata has predominantly Cl" , SO" and Na+ ions in soluble salt, and the soluble salt content changes rapidly, indicating a wetting-drying fluctuation trend of the area. The uppermost part of sedimen-tary strata in the Akl core contains rock salt and soluble salt which are mainly composed of Cl" and Na+ ions, and the ions in soluble salt is the highest in this stage, representing an evolutionary trend of the paleolake towards a stage of chlorite lake. These phenomena might be considered to be the beginning of an extremely arid climate condition.
中文关键词	罗布泊 ; 氧化物 ; Ak1孔 ; 易溶盐 ; 古气候
英文关键词	Lop Nur soluble salt paleoclimate Akl core oxide
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MULTIDISCIPLINARY SCIENCES
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:1700302
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204917
作者单位	1.中国地质科学院地质研究所, 北京 100037, 中国; 2.新疆地质勘查局第二水文地质大队, 昌吉, 新疆 831100, 中国
推荐引用方式 GB/T 7714	王永,赵振宏,林景星. 罗布泊AK1孔沉积物地球化学组成与古气候[J],2004,25(6):653-658.
APA	王永,赵振宏,&林景星.(2004).罗布泊AK1孔沉积物地球化学组成与古气候.地球学报,25(6),653-658.
MLA	王永,et al."罗布泊AK1孔沉积物地球化学组成与古气候".地球学报 25.6(2004):653-658.