邯郸梧桐庄矿煤中硅化木地球化学特征研究  

Geochemistry of Petrified Wood in Coal Seam in Wutongzhuang Mine in Handan

作　　者：张景森[1,2] 赵云云 金超[1,2] 邢乐才 辛雨萌[1,2] ZHANG Jingsen;ZHAO Yunyun;JIN Chao;XING Lecai;XIN Yumeng(Key Laboratory of Resource Survey and Research of Hebei Province,Hebei Handan 056038,China;School of Earth Science and Engineering,Hebei University of Engineering,Hebei Handan 056038,China)

机构地区：[1]河北工程大学河北省资源勘测研究重点实验室,河北邯郸056038 [2]河北工程大学地球科学与工程学院,河北邯郸056038

出　　处：《河北工程大学学报（自然科学版）》2019年第2期70-73,78,共5页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：国家自然科学基金重点项目(41330317);国家自然科学基金青年项目(41604069);河北省高等学校科学技术研究拔尖人才项目(BJ2018010);河北省自然科学基金项目(D2013402026)

摘　　要：对邯郸梧桐庄矿二叠系山西组2号煤层中硅化木进行薄片光学显微镜观察,分别使用X射线荧光法和电感耦合等离子质谱法分析其主量和微量元素。结果表明:(1)硅化木主要由结构镜质体和玉髓组成,发育后生方解石微脉;(2)相对于大陆上地壳,硅化木相对富集Sr、Zr、Nb、Mo、Cd,相对亏损Li、Rb、Cs、Co、La、Ce、Pr、T1、Bi、Th,特征元素对分异明显;对球粒陨石标准化Ce无异常、Eu中等负异常、上凸型稀土元素配分曲线表明其稀土元素主要由成煤期低温热水活动有关的硅化作用控制。The petrified wood from the No.2 coal seam of Permian Shanxi Formation in Wutongzhuang Mine,Handan area,was studied by using optical microscope,X-ray fluorescence spectrum(XRF)and inductively coupled plasma mass spectrometry(ICP-MS)analyzers for its mineralogy,major and trace elements,respectively.The result shows that,(1)the petrified wood is mainly composed of telinite and chalcedony,with an amount of epigenetic calcite micro-vein;(2)Comparing to the upper continental crust,the fossil is relatively rich in Sr,Zr,Nb,Mo and Cd,and lack in Li、Rb、Cs、Co、La、Ce、Pr、Tl、Bi and Th,and its characteristic elemental pairs have an obvious differentiation;normalized to chondrite,the rare earth elements(REE)pattern is a convex curve without Ce anomaly and with a moderately negative Eu anomaly,which suggests that the REE is mainly determined by the silicification closely associated with the low-temperature hydrothermal activity during the Permian coalification.

关 键 词：玉髓 方解石 微量元素 稀土元素 低温热水活动 

分 类 号：P581[天文地球—岩石学] P594[天文地球—地质学]