• 责任者：Gao Wenpeng (Faculty of Earth Sciences ; China University of Geosciences ; Wuhan 430074 ; China) ; Hong Hanlie
• 刊名：Earth Science
• 出版年：2013
• 卷期：38(6)
• 关键词：粘土矿物 ; clay minerals ; 贵州 ; Guizhou Province
• 页码：p.1253-1262
• 图表：6 illus., 1 table, 44 refs.
• 分类号：0803
• issnNo：ISSN1000-2383
• isbnNo：CN42-1233/P

     The fine structure and provenance of clays across the Permian-Triassic boundary （PTB） in the Yanlou section were investigated by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and differential scanning calorimetry （DSC）. The results suggest that the layers have two different provenances. The sample of YN06 exhibits a condensed texture with an oriented arrangement of detrital clay particles and consists mainly of illite and minor chlorite, with irregular outlines or ragged edges. The dehydroxylation temperature occurred at 590℃, indicating that clay minerals are composed of trans-vacant （tv） octahedral sheets derived from weathering of detrital illite. Other samples are composed mainly of I-S, illite and minor smecrite, chlorite, with dehydroxylation temperature all above 600 ℃, suggesting that clay minerals consist of a mixture of tv and cv sheets and were derived from a mixture of terrigenous and volcanic sources.