石油实验地质2017，Vol.39Issue(5)：666-674,9.DOI:10.11781/sysydz201705666
塔里木盆地古城地区上寒武统白云岩稀土元素地球化学特征及成因模式
Geochemical characteristics and genetic model of rare earth elements in the Upper Cambrian dolomites in Gucheng area, Tarim Basin
摘要
Abstract
The special sedimentary and tectonic evolution in Gucheng area of the Tarim Basin indicated that dolomite formation might be unique. The REE geochemical characteristics of various kinds of crystalline dolomites and cave fillings were analyzed based on thin sections, cores and sedimentary environment analyses. The results showed that the NASC normalized REE distribution patterns of samples can be divided into four types:negative anomalyδCe and weak positive anomaly δEu, negative anomaly δEu, positive anomaly δEu, and positive anomaly δCe. Further studies showed that the main origin of dolomites was the evaporation pump model, and the hydrothermal environment was also important, while the influence of mixed water and burial dolomitization was relatively smaller. In addition, all the cave filling samples were formed in a mixed water and hydrothermal environment, while the evaporation pump and burial dolomitization did not form any filling samples, which might be helpful to find dolomite reservoirs.关键词
白云岩/稀土元素/上寒武统/古城地区/塔里木盆地Key words
dolomite/rare earth element/Upper Cambrian/Gucheng area/Tarim Basin分类
天文与地球科学引用本文复制引用
郭春涛,李德武,陈树民..塔里木盆地古城地区上寒武统白云岩稀土元素地球化学特征及成因模式[J].石油实验地质,2017,39(5):666-674,9.基金项目
国家科技重大专项(2011ZX05008-003)资助. （2011ZX05008-003）
