成都理工大学学报（自然科学版）2016，Vol.43Issue(2)：188-198,11.DOI:10.3969/j.issn.1671-9727.2016.02.05
川中地区龙王庙组洞穴充填物特征及油气地质意义
Characteristics and petroleum geological implication of paleo-cave fillings in Longwangmiao Formation of Lower Cambrian in central Sichuan Basin,China
摘要
Abstract
Large scale paleo-caves occur in the rocks of Lower Cambrian in the central Sichuan Basin. Based on the analysis of lithology,sporopollen fossils,major elements,trace elements,rare elements and regional tectonic evolution,the forming time of paleo-caves and their filling processes are studied. It reveals that the sporopollen fossils belong to Carboniferous to early Cretaceous,and element geochemistry of the argillaceous rock shows high B content,low Sr/Ba and various rare earth elements distribution.Superimposed processes of weathering and bed-parallel karstification involved in the formation of paleo-caves during Carboniferous to early Permian.It experienced sedimentation and filling of materials brought by underflow from exposed high lands.Also,surface water carried dissolved materials migrating along the faults during Mesozoic to Cenozoic period.Grain shoal belts, near Longwangmiao Formation pinch-out line which is affected by Carboniferous to early Permian weathering and bedded karstification,are favorable areas for formation of reservoir in central Sichuan Basin.关键词
川中古隆起/下寒武统/龙王庙组/洞穴/碳酸盐岩储层/孢粉/元素地球化学Key words
paleo-uplift in central Sichuan Basin/Lower Cambrian/Longwangmiao Formation/paleo-cave/carbonate reservoir/sporopollen fossil/elemental geochemistry分类
天文与地球科学引用本文复制引用
周慧,罗文军,张宝民,李伟,单秀琴,范建玮,刘静江,张师本,文龙,罗冰..川中地区龙王庙组洞穴充填物特征及油气地质意义[J].成都理工大学学报（自然科学版）,2016,43(2):188-198,11.基金项目
国家油气重大专项（2011ZX05004）。 （）
