古地理学报2016，Vol.18Issue(6)：905-919,15.DOI:10.7605/gdlxb.2016.06.069
华南晚二叠世层序-古地理及聚煤规律
Sequence-palaeogeography and coal accumulation of the Late Permian in South China
摘要
Abstract
The Late Permian is a significant period for coal accumulation,and during this period minable coal seams were formed in the most parts in South China.Impacted by sea level changes,a full range of facies were developed in the coal-bearing successions, including terrestrial,terrestrial-marine transitional,and marine facies.By means of data from outcrop section and borehole cores,some key se-quence stratigraphic surfaces were recognized which including regional unconformities,basal surface of in-cised valley fills,inter-fluvial paleosol horizons,and facies-reversal surfaces.The maximum flooding sur-faces were also recognized by the reginal distribution of marine limestone beds towards palaeo-continent. Combined with the achievements made by previous research on stratigraphic sub-correlation and regional coal correlation in South China,the Upper Permian are subdivided into three third-order sequences and nine systems tracts.The single factor analysis and multifactor comprehensive mapping method was used to reconstruct the lithofacies palaeogeography of each third sequence.The results showed that the coals in se-quence I were formed in tide-influenced lower delta plain and lagoon-tidal flat facies belts,with distribu-tion of the thick coal seams being controlled by these facies belts.In sequence Ⅱ,thick coals were devel-oped in delta plain facies belts and the thin coals were formed in the open platform facies belts.The total thickness of coal seams in sequence Ⅱ decreased stepwise from west to east in South China,displaying that the coal in the western part were thickest,the coals in the central part were thin,while no coal were formed in the eastern part.The coals in sequence Ⅲ were formed mainly in delta plain facies belt which was mainly developed in the western part of South China,mainly in the eastern part of the Kangdian Old-land.During this period,the central and eastern parts of South China were occupied by the shallow marine carbonate platform and deep marine facies belts which were not favorable for coal accumulation.关键词
华南/晚二叠世/层序地层/岩相古地理/聚煤规律Key words
South China/Late Permian/sequence stratigraphy/lithofacies palaeogeography/coal accumulation pattern分类
天文与地球科学引用本文复制引用
邵龙义,徐锡惠,黎光明,陈忠恕,程爱国,张超,闫志明,董大啸,高彩霞,李英娇,徐晓燕,梁万林,易同生..华南晚二叠世层序-古地理及聚煤规律[J].古地理学报,2016,18(6):905-919,15.基金项目
国家自然科学基金项目（编号41572090）资助。［Financially supported by the National Science Foundation of China （No．41572090）］ （）
