煤田地质与勘探2017，Vol.45Issue(3)：18-24,31,8.DOI:10.3969/j.issn.1001-1986.2017.03.004
临兴地区煤系泥岩微量元素特征及其地质意义
Characteristic and geological significance of trace elements in mudstone of Upper Carboniferous–Lower Permian in Linxing area
摘要
Abstract
Trace elements of 18 mudstone samples of Linxing area in the eastern margin of Ordos basin were ana-lyzed using ICP-MS and ICP-AES to study geochemical characteristics and the geological application of trace elements. The results show thatcompared with elements' average content of the crust clay rock, some trace ele-ments such as Li, Sc, Nb and Th are relative enriched, depleted elements such as Sr, Rb, Ba and Cs are almost in line with them such as Be, Co, Zn and Mo; based on statistics software"Q"cluster analysis, the combinating char-acteristics of trace elements coincide with sedimentary facies division when the clustering distances are 25 and 11; Th/Sc, Th/U-Th, K2O-Rb and multielements provenance discrimination diagram show that sediment source from upper crust mostly consist of felsic material and cyclic sedimentation, mixed with few neutral and basic material. In addition, the direction of source is the north of Linxing area according to the changing sand-bearing ratios and the distribution characteristic of the heavy mineral combination;the element migration and enrichment which were indicated by Sr/Cu, Sr, Ti and P reflected that the climate from Late Carboniferous to Early Permian was relatively wet, changing from warm-humid to dry-heat.关键词
微量元素/物源示踪/古气候响应/临兴地区Key words
trace element/source direction/paleoclimate response/Linxing area分类
天文与地球科学引用本文复制引用
薛良喜,沈玉林,顾娇杨,郑俊,张春良..临兴地区煤系泥岩微量元素特征及其地质意义[J].煤田地质与勘探,2017,45(3):18-24,31,8.基金项目
国家自然科学基金项目(41672146,41541046) （41672146,41541046）
国家科技重大专项课题(2016ZX05044-002,2016ZX05066-001) National Natural Science Foundation of China(41672146, 41541046) （2016ZX05044-002,2016ZX05066-001）
National Science and Technology Major Projects (2016ZX05044-002, 2016ZX05066-001) （2016ZX05044-002, 2016ZX05066-001）
