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喀斯特地区侵蚀速率是理解全球碳循环、喀斯特地貌演化以及土地利用等学科的最基本问题之一.侵蚀速率估算方法主要包括:(1)流域河水化学溶解物平衡的计算;(2)置于不同环境下的大理岩片重量损失的观测;(3)显微侵蚀测量仪对暴露地表的直接测量;(4)碳酸盐岩中石英脉的长期观测;(5)地表岩石中宇宙成因核素36Cl(半衰期3万年)的测定.与其他方法相比,地表岩石中36Cl含量反映了104~105年尺度内的岩石暴露和侵蚀历史.本项研究收集了贵州省内不同地区的碳酸盐
The erosion rate in the karst area is one of the most basic problems in understanding the global carbon cycle, karst landform evolution and land use, etc. The estimation methods of erosion rate mainly include: (1) calculation of chemical dissolved matter balance in river basin; (2) (3) direct measurement of exposed surface by micro-erosion measuring instruments; (4) long-term observation of quartz veins in carbonate rocks; (5) formation of cosmic nuclides in surface rocks 36 Cl (Half-life of 30000 years) .Compared with other methods, the content of 36Cl in surface rocks reflects the history of rock exposure and erosion in the 104-105 year scale.This study collected carbonate from different parts of Guizhou Province