富锂煤层碎屑物源探讨——以平朔矿区安家岭煤矿太原组煤层为例

P595%P588.21; 平朔矿区安家岭煤矿太原组煤层中Li,Al等有益元素的富集主要受陆源碎屑的影响,为明确其物源区,以煤层顶、底板和夹矸样品为研究对象,利用岩石薄片、ICP-OES、ICP-MS等方法对4,8,9和11号煤层的顶底板和夹矸的岩石学和地球化学特征进行分析,进而探讨了其物源属性.岩石学结果表明,研究区砂岩样品中碎屑成分以石英和岩屑为主,杂基含量低,胶结类型主要为钙质胶结.地球化学结果显示,研究区样品主要成分为SiO2和Al2O3,其他元素的含量都比较低.微量元素Li在各个煤层顶底板和夹矸中的富集系数变化较大,其中11号煤层样品中Li富集程度最高,9号煤层样品中相对富集,8号煤...

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Published in煤炭学报 Vol. 46; no. 7; pp. 2346 - 2359
Main Authors 成贤康, 孙蓓蕾, 刘超, 曾凡桂, 解锡超, 畅向东
Format Journal Article
LanguageChinese
Published 煤与煤系气地质山西省重点实验室,山西太原030024%山西省地质矿产研究院,山西太原030001 01.07.2021
太原理工大学矿业工程学院,山西太原030024
煤与煤系气地质山西省重点实验室,山西太原030024
Subjects
Online AccessGet full text
ISSN0253-9993
DOI10.13225/j.cnki.jccs.2021.0071

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Abstract P595%P588.21; 平朔矿区安家岭煤矿太原组煤层中Li,Al等有益元素的富集主要受陆源碎屑的影响,为明确其物源区,以煤层顶、底板和夹矸样品为研究对象,利用岩石薄片、ICP-OES、ICP-MS等方法对4,8,9和11号煤层的顶底板和夹矸的岩石学和地球化学特征进行分析,进而探讨了其物源属性.岩石学结果表明,研究区砂岩样品中碎屑成分以石英和岩屑为主,杂基含量低,胶结类型主要为钙质胶结.地球化学结果显示,研究区样品主要成分为SiO2和Al2O3,其他元素的含量都比较低.微量元素Li在各个煤层顶底板和夹矸中的富集系数变化较大,其中11号煤层样品中Li富集程度最高,9号煤层样品中相对富集,8号煤层样品中表现为相对亏损,4号煤层3个样品中仅有夹矸样品富集,顶底板样品均不富集.其余微量元素表现为Th,Hf,Zr和Nb等相对富集,Co,Sc,Cr,Ni,V,Rb,Cs和Ga等元素相对亏损.根据元素质量分数比值等地球化学参数和SiO2-TiO2,Hf-La/Th,∑REE-La/Yb,Dickinson图解及DF(A-P)MT图解,结合区域地质背景,研究区富Li和不富Li的煤层顶底板和夹矸中碎屑物质主要来源于华北北缘的内蒙古隆起.这2类煤层顶底板和夹矸的源岩类型都是以长英质火成岩为主.相较于富Li煤层顶底板和夹矸,不富Li煤层样品的源岩中有更多沉积岩的加入.
AbstractList P595%P588.21; 平朔矿区安家岭煤矿太原组煤层中Li,Al等有益元素的富集主要受陆源碎屑的影响,为明确其物源区,以煤层顶、底板和夹矸样品为研究对象,利用岩石薄片、ICP-OES、ICP-MS等方法对4,8,9和11号煤层的顶底板和夹矸的岩石学和地球化学特征进行分析,进而探讨了其物源属性.岩石学结果表明,研究区砂岩样品中碎屑成分以石英和岩屑为主,杂基含量低,胶结类型主要为钙质胶结.地球化学结果显示,研究区样品主要成分为SiO2和Al2O3,其他元素的含量都比较低.微量元素Li在各个煤层顶底板和夹矸中的富集系数变化较大,其中11号煤层样品中Li富集程度最高,9号煤层样品中相对富集,8号煤层样品中表现为相对亏损,4号煤层3个样品中仅有夹矸样品富集,顶底板样品均不富集.其余微量元素表现为Th,Hf,Zr和Nb等相对富集,Co,Sc,Cr,Ni,V,Rb,Cs和Ga等元素相对亏损.根据元素质量分数比值等地球化学参数和SiO2-TiO2,Hf-La/Th,∑REE-La/Yb,Dickinson图解及DF(A-P)MT图解,结合区域地质背景,研究区富Li和不富Li的煤层顶底板和夹矸中碎屑物质主要来源于华北北缘的内蒙古隆起.这2类煤层顶底板和夹矸的源岩类型都是以长英质火成岩为主.相较于富Li煤层顶底板和夹矸,不富Li煤层样品的源岩中有更多沉积岩的加入.
Author 成贤康
畅向东
孙蓓蕾
曾凡桂
刘超
解锡超
AuthorAffiliation 太原理工大学矿业工程学院,山西太原030024;煤与煤系气地质山西省重点实验室,山西太原030024%山西省地质矿产研究院,山西太原030001;煤与煤系气地质山西省重点实验室,山西太原030024
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CHENG Xiankang
CHANG Xiangdong
SUN Beilei
LIU Chao
XIE XiChao
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DocumentTitle_FL Provenance of debris in lithium-rich coal seam:A case study of Taiyuan group coal seam in Anjialing Coal Mine,Pingshuo mining area
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地球化学特征
富锂煤层
安家岭煤矿
平朔矿区
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Title 富锂煤层碎屑物源探讨——以平朔矿区安家岭煤矿太原组煤层为例
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