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 | , , , , , |
| Format | Journal Article |
| Language | Chinese |
| 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 Access | Get full text |
| ISSN | 0253-9993 |
| DOI | 10.13225/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. |
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| 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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| Author_FL | ZENG Fangui 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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| Keywords | 物源 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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