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主办单位：中国地质调查局西安地质调查中心
中国地质学会

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黔北新仁地区上二叠统龙潭组煤质地球化学特征及聚煤规律

张文斌, 何碧, 陶刚, 赵飞, 王宁祖, 杨珍, 张志玺, 孙平原

张文斌, 何碧, 陶刚, 等. 黔北新仁地区上二叠统龙潭组煤质地球化学特征及聚煤规律[J]. 西北地质, 2020, 53(4): 51-65. DOI: 10.19751/j.cnki.61-1149/p.2020.04.005
引用本文: 张文斌, 何碧, 陶刚, 等. 黔北新仁地区上二叠统龙潭组煤质地球化学特征及聚煤规律[J]. 西北地质, 2020, 53(4): 51-65. DOI: 10.19751/j.cnki.61-1149/p.2020.04.005
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ZHANG Wenbin, HE Bi, TAO Gang, et al. Geochemical Characteristics and Accumulation Rules of Coal in the Upper Permian Longtan Formation of Xinren Area, North Guizhou[J]. Northwestern Geology, 2020, 53(4): 51-65. DOI: 10.19751/j.cnki.61-1149/p.2020.04.005
Citation: ZHANG Wenbin, HE Bi, TAO Gang, et al. Geochemical Characteristics and Accumulation Rules of Coal in the Upper Permian Longtan Formation of Xinren Area, North Guizhou[J]. Northwestern Geology, 2020, 53(4): 51-65. DOI: 10.19751/j.cnki.61-1149/p.2020.04.005
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黔北新仁地区上二叠统龙潭组煤质地球化学特征及聚煤规律

  • 1. 甘肃省地质矿产勘查开发局第二地质矿产勘查院, 甘肃 兰州 730020;

  • 2. 西南科技大学环境与资源学院, 四川 绵阳 621010;

  • 3. 重庆工程职业技术学院, 重庆 402260

基金项目: 

中国地质调查局地质调查项目“乌蒙山区地质矿产综合调查”（DD20160019），中国地质调查局成都地质调查中心项目“贵州乌蒙山区1：5万店子场（G48E006018）、大关（G48E007017）、六厂（G48E007018）3幅区域地质调查”（DD20160019-04）

详细信息
    作者简介:

    张文斌(1983-),男,工程师,主要从事区域地质矿产勘查工作。E-mail:zhangwenbin2019@sina.com

  • 中图分类号: P618.11

Geochemical Characteristics and Accumulation Rules of Coal in the Upper Permian Longtan Formation of Xinren Area, North Guizhou

  • 1. The Second Institute of Geology and Minerals Exploration Team, Gansu Provincial Bureau of Geology and Minerals Exploration and Development, Lanzhou 730020, Gansu, China;

  • 2. School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, Sichuan, China;

  • 3. Chongqing Vocational Institute of Engineering, Chongqing, 402260, China

摘要

    摘要
  • 摘要: 根据黔北新仁地区上二叠统龙潭组煤样的主量元素、微量元素、工业分析、硫分及灰分分析数据，评价了该地区晚二叠世煤的总体煤质特征；在此基础上重点探讨了煤中硫分和灰分与成煤环境的联系。结果表明，黔北新仁地区上二叠统龙潭组煤中SiO2、TiO2、K2O含量较高，其中SiO2是全国煤的6倍，TiO2是全国煤的7倍，K2O是全国煤的10倍；其余氧化物含量均是全国煤的1~4倍。新仁地区上二叠统龙潭组中煤的球粒陨石标准化稀土元素配分曲线除样品PM403-MY3、MY8以外，其他各煤样稀土元素分布模式相似，整体上呈左高右低的宽缓的“V”型曲线，（La/Yb）N为5.27~18.34，均值为8.91，表明轻重稀土元素分馏程度高的特征；δEu为0.38~1.52，均值为0.74，具有显著的负Eu异常。新仁地区煤炭资源具有高全水分、中-高灰分、低-中高挥发分、特低和低硫分、低固定碳、低磷分、特低氯等特征。此外，煤中灰分产率、煤灰成分指数以及灰成分三端元分析均揭示聚煤环境为从陆源区水浅、水动力较强而还原性较弱的环境，向远离陆源区水深、水动力较弱而还原性较强的环境变化，与全硫分分析的结论相一致。综合分析认为，新仁地区晚二叠世聚煤规律的主控地质因素为构造运动，与峨眉山玄武岩、古气候、沉积环境等因素有关。
    Abstract: This paper evaluates the coal quality in Late Permian on the basis of the Upper Permian coal samples’ main elements, trace elements, industrial analysis, sulfur and ash analysis data in Xinren area of North Guizhou. The focus is on the relationship between sulfur and ash in coal and coal-forming environment. The results show that the content of SiO2, TiO2 and K2O is much higher, among which SiO2 is 6 times higher than that of national average; TiO2 is 7 times higher and K2O is 10 times; the remaining oxide is 1 to 4 times of the average. In the normalized REE partition curve of coal chondrite of the upper Permian Longtan Formation of Xinren area, except the samples of PM403-MY3 and MY8, the REE distribution pattern in coal chondrite is similar, appearing a wide “V” curve with left high and right low. (La/Yb)N is 5.27-18.34, with the average of 8.91 indicating the high fractionation of light and heavy rare earth elements. δEu is 0.38-1.52，the average being 0.74，with a significantly negative Eu anomaly. The coal resources in Xinren area are characterized by high total moisture, medium-high ash, low-medium-high volatility, ultra-low and low sulfur, low fixed-carbon, low phosphorus and ultra-low chlorine. In addition, ash yield in coal, composition index of coal ash and three-terminal analysis of ash composition all revealed that the coal-rich environment is from shallow water with strong hydrodynamics and weaker reduction in the land source area to deep water with weak hydrodynamics and strong reductive away from the land source area. This is consistent with the conclusion from the total sulfur analysis. The comprehensive analysis shows that the main geological factor of coal accumulation in Late Permian Xinren area is the tectonic movement, with Emeishan basalt, paleoclimate and sedimentary environment being some other factors.
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  • 修回日期:  2020-08-12
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  • 发布日期:  2020-12-04

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