碎屑岩粘土分离的一些改进

IMPROVEMENTS FOR CLAY SEPARATION FROM CLASTIC SAMPLES

冯雪 吴朝东 奚娴婷

Feng Xue Wu Chaodong Xi Xianting

北京大学, 地球与空间科学学院, 北京, 100871 2. 北京大学, 环境学院, 北京, 100871

School of Earth and Space Sciences, Peking University, Beijing 100871, China 2. School of Environmental Sciences, Peking University, Beijing 100871, China

粘土实验样品的制备是粘土分析的基础,粘土提取多侧重于对结构松散的粘土较多的样品进行提取,对于碎屑岩中粘土的分离则相对困难。基于粘土分离原理,利用同步跟进分离提取方法可以高效提取碎屑岩粘土,并将样品分离成研究所需的各个粒级部分。在对42个采自库车凹陷的中生代碎屑岩样品的粘土分离实验中,利用计算出的合理提取速度,确定出了分离速度公式。利用同步分离技术对样品中粒径>20,20~5,5~2μm的部分进行了分离,并且进行了激光测试验证,实验提取的结果与测试结果吻合。

Sample preparation is the basic stage in clay experiment.The traditional method is limited to those loose-structured samples,thus unfit for samples with diagenesis.A synchronous picking-up method is used in sample preparation and analysis of 42 pieces of Mesozoic mudstone and sandstone from the Kuche Sag of the Tarim Basin.Samples are separated into 4 sections: 20 μm,20-5 μm,5-2 μm and 2 μm with parameters calculated.The results are well proved by laser analysis.

国家重点基础研究(973)项目(2001CB409804)

https://doi.org/10.11781/sysydz200602196