干旱区生态环境知识资源中心(Arid): 150kaB.P.以来萨拉乌苏河流域的CaCO3旋回

Arid

	150kaB.P.以来萨拉乌苏河流域的CaCO3旋回
其他题名	Calcium Carbonate Cycles in Salawusu River Valley since 150 ka B.P.
	罗开利 1; 李保生 1; 祝一志 2; 靳鹤龄 3; 余雪飞 1; 吕玉晓 1; 阎满存 ; 李后信 1; 姚春霞 1; 张宇红 1
来源期刊	地理科学
ISSN	1000-0690
出版年	2002
卷号	22 期号:6 页码:683-688
中文摘要	以米浪沟湾地层剖面作为萨拉乌苏河流域的典型剖面，探讨了150kaB.P.以来的CaCO3含量分布与气候变化的关系。1）该剖面CaCO3含量及其低-高变化同古风成沙与上覆河湖相或古土壤构成的没积旋回呈现出明显的对应关系。与米浪沟湾剖面的沉积旋回一样，CaCO3在分布上相应地构成了27个含量高低变化旋回。2)CaCO3在风成沙中含量的分布比较稀散，0.8%，平均值2.50；在河湖相和古土壤中土壤中相对富集，2.20%，平均值5.74。从而揭示出其时两者的气候背景是不同的，前者是干旱寒冷气候作用下的风力的侵蚀、搬运与堆积的产物；而后者则与暖湿气候环境下萨拉乌苏河流域地处鄂尔多斯高原和黄土高原这间特殊的低洼地貌位置有关。气候暖湿，河湖沼泽发育、成土成壤作用增强，低洼的集水条件有利于CaCO3的聚集。3）导致米浪沟湾剖面CaCO3的多旋回相对稀钐与聚集的根本原因可能是150kaB.P.以来北半球冰期-间冰期气候波动影响下乌素沙漠冬夏季风的多次更迭所致。
英文摘要	This paper discuss the relationship between the calcium carbonate content and climatic change in the Milanggouwan stratigraphical section, being regarded as a prototype section in the Salawusu River valley since 150 kaB.P,The calcium carbonate content in the section and its low-high change takes on remarkable corresponding relationship with the sedimentary cycles of palaeo-aeolian sands and its overlying fluvio-lacustrine facies or/and palaebsols. Same as the sedimentary cycles in the section, the calcium carbonate distibution composes 27 cycles of high and low content values accordingly. Calcium carbonate in the aeolian sands of Salawusu River Valley is relatively sparse, 0.8% -7.18%,with an average value of 2.50%; whereas relatively gathering in fluvio-lacustrine facies and palaeosols, 2,20 % - 14.90 %, with an average value of 5. 74 % . It shows that the two climatic backgrounds then were different. The former was the result of erosion and accumulation under wind force during the cold-arid climate, whereas the latter was related to its particular low-lying physiognomy position between the Ordos Plateau and the Loess Plateau under warm-humid climate background. When the climate is warm-humid, fluvio-lacustrine and swamp facies develop, soil forming action strengthen, .and low-lying catchment condition is benefit to calcium carbonate assemble. The principal reason of multi-cycle relative migration and gather of calcium carbonate in the Milang-gouwan stratigraphical section is the repeatedly mutual alternate between the winter and summer monsoons in the Mu Us Desert, which was influenced by the climate vicissitudes in the northern hemisphere during glacial and interglacial periods since 150 ka B.P.
中文关键词	米浪沟湾剖面 ; 沉积-气候旋回 ; 古气候 ; 碳酸钙
英文关键词	150kaB.P. CaCO3 milanggouwan section 150 ka B. P. calcium carbonate 27 cycles of sediment-climate
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:1072020
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/203067
作者单位	1.华南师范大学地理系, 广州, 广东 510631, 中国; 2.中国科学院地球环境研究所, 黄土与第四纪地质国家重点实验室, 西安, 陕西 710061, 中国; 3.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国; 4.香港大学地理与地质学系, Hong Kong
推荐引用方式 GB/T 7714	罗开利,李保生,祝一志,等. 150kaB.P.以来萨拉乌苏河流域的CaCO3旋回[J]. 中国科学院西北生态环境资源研究院,2002,22(6):683-688.
APA	罗开利.,李保生.,祝一志.,靳鹤龄.,余雪飞.,...&张宇红.(2002).150kaB.P.以来萨拉乌苏河流域的CaCO3旋回.地理科学,22(6),683-688.
MLA	罗开利,et al."150kaB.P.以来萨拉乌苏河流域的CaCO3旋回".地理科学 22.6(2002):683-688.