东海岛屿风尘沉积中的碳酸盐特征及地质意义

许健; 郑祥民; 曹希强

东海岛屿风尘沉积中的碳酸盐特征及地质意义

1 华东师范大学地理信息科学教育部重点实验室, 上海 200062;
2 河南省国土资源科学研究院, 郑州 450053

基金项目:

华东师范大学研究生科研基金资助项目

上海市科技委员会重大项目(04DZ19301)

国家自然科学基金项目(40372135)

详细信息

作者简介:
许健(1980-),男,研究生,主要从事第四纪研究

中图分类号: P595
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出版历程
- 收稿日期: 2005-07-04
- 修回日期: 2005-10-25

CONTENT OF CaCO₃ IN THE LOESS OF SHENGSI ISLANDS

1 Key Lab of Geo-information Science, Education Ministry, East China Normal University, Shanghai 200062, China;
2 He'nan Scientific Institute of Land and Resources, Zhengzhou 450053, China

摘要

摘要: 通过分析东海嵊泗列岛嵊山黄土、浪岗山黄土的CaCO₃特征,发现其含量极低,仅为0.1%左右,远低于内陆黄土,这是由于降水量大、剖面厚度小及周围多火山活动等因素共同作用的结果。按成因划分,嵊泗黄土中的CaCO₃属于后期淋溶残余型,不适于作为恢复当地古环境的替代指标。与基本在同一直线上的兰州、渭南、南京及嵊山等地黄土中的CaCO₃平均含量进行比较,发现其由西北向东南均匀递减,这是由于风尘黄土地层的淋滤作用和Ca (HCO₃)₂的淀积作用强度对降水量变化的响应速度不同的结果。
- 碳酸盐 /
- 黄土 /
- 淋滤 /
- 淀积 /
- 嵊泗列岛
Abstract: We analyzed the content of CaCO₃ in the loess of Shengshan Island and Langgangshan Islands,and found the content is only about 0.1%, which is far below that in other loess sections.That should be caused by high precipitation,thin thickness of the section and lots of volcanic eruptions around. The CaCO₃ in the loess of Shengshan Island and Langgangshan Islands belongs to deuterogenic residual CaCO₃, and cannot be used to reflect paleoclimate. We contrast the content of CaCO₃ in the loess of Shengshan Island and Langgangshan Islands with other loess sections, and find the content of CaCO₃ in the loess is decreased equably, which should be the result of different velocity of eluviate and illuviate caused by precipitation changes.
- CaCO₃ /
- loess /
- eluviate /
- illuviate /
- Shengsi Islands

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参考文献(12)

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