IMPROVEMENTS FOR CLAY SEPARATION FROM CLASTIC SAMPLES
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摘要: 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。Abstract: 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.
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Key words:
- synchronous picking-up method /
- Sample preparation /
- clay mineral /
- clastic rock
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