基于碳酸盐矿物数据估算色林错5000a BP以来的沉积无机碳通量  

Estimation of Carbon Flux Since 5000a BP at Selin Co Based on Carbonate Minerals

作　　者：聂小芳 朱立平[2,3] 韩作振 李明慧 王晓晓[2] NIE Xiaofang;ZHU Liping;HAN Zuozhen;LI Minghui;WANG Xiaoxiao(College of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China;National Key Lab of Tibetan Plateau,Beijing 100101,China)

机构地区：[1]山东科技大学地球科学与工程学院,山东青岛266590 [2]中国科学院青藏高原研究所,北京100101 [3]青藏高原国家重点实验室,北京100101

出　　处：《中国无机分析化学》2023年第1期77-83,共7页Chinese Journal of Inorganic Analytical Chemistry

基　　金：第二次青藏高原科考项目(2019QZKK0202);国家自然科学基金资助项目(41831177);中科院先导专项(XDA20020100,XDA20070101)。

摘　　要：湖泊沉积物碳通量是当前研究的重点内容,湖泊沉积物中无机碳主要以碳酸盐矿物的形式存在,而获取碳酸盐矿物中的无机碳含量的方法主要有X-射线衍射(XRD)法和酸溶后测定法两种。基于西藏色林错钻孔沉积物的X-射线衍射数据,估算了沉积物每一种碳酸盐矿物和总无机碳的沉积碳通量,并与西藏及其他地区酸溶法的数据进行对比,发现XRD方法计算的沉积无机碳通量与酸溶法具有很好的一致性。湖泊沉积物中无机碳通量的问题本质上是碳酸盐矿物的成因问题,5000 a BP以来,色林错沉积的无机碳通量主要影响因素是干冷的气候,文石矿物含量决定了色林错沉积总无机碳通量的高低变化。Carbon fluxes in lake sediments is the focus of current research.Inorganic carbon in lake sediments exists mainly in the form of carbonate minerals.There are two main methods to obtain inorganic carbon in carbonate minerals,X-ray diffractometer and acid dissolution.In this paper,the sedimentary carbon fluxes of each carbonate mineral and total inorganic carbon in the sediment is estimated based on the X-ray diffractometer data of the sediments in the borehole of Selin Co,Tibet,and compared with the data of acid dissolution method and XRD method in Tibet and other regions,it is found that the inorganic carbon fluxes calculated by the XRD method is well comparable with the acid solution method.The problem of inorganic carbon fluxes in lake sediments is essentially the origin of carbonate minerals,Since 5000a BP,the main influencing factor of inorganic carbon fluxes in the sediment of Selin Co is dry and cold climate,and aragonite mineral content determines the variation of total inorganic carbon fluxes in the sediment of Selin Co.

关 键 词：大气CO_(2)消耗 水菱镁矿 沉积无机碳通量 

分 类 号：O657.34[理学—分析化学] TH744.15[理学—化学]