Geological And Tectonic Evolution Fatures And Coal Accumulating-formating Rule In The Southern Margin Of Turpan-Hami Basin，Xinjiang

Turpan-Hami Basin is located in the east of Xinjiang, tectonic units in thesoutheastern of Kazakhstan-Junggar plate, which is located in the flatten parts of Siberia,Kazakhstan and Tarim plate. The basin which has experienced several tectonic evolutionand polycyclic settlement is a superposed-extruded type sedimentary basin which containscoal, oil, natural gas. The complex geological conditions are contributed to make the basinform more type coal field. With the exploration degree of coal in Turpan-Hami Basincontinues to improve, especially the accumulation of exploration and development dataand the knowledge of the basin evolution regulation, to further strengthen the systematicstudy of coal forming law is very important.This paper is based on collect extensive research data, and using more technologicalmeans, which include field geological measure,2D seismic technology, geophysicallogging and drilling verification, to systematically geological survey and research on coalbearing strata, structure, coal seam, coal quality and resources occurrence conditions, andgeological characteristics of coal which locates in Dananhu and Shaerhu sag on thesouthern margin of Turpan-Hami Basin. Afterwards intensively analysis coal tectonicevolution and accumulating regulation of the basin, and make prediction and assessmentbased on the understanding of the periphery of the basin. The main knowledge is:First, comprehensively study regional geology, petroleum geology information, andcontrast2D seismic interpretation with drilling results, further understand the basictectonic characteristics of Turpan-Hami basin. The basin is divided into fourⅠgradetectonic units and twelveⅡgrade tectonic units. Preliminary master the basic tectoniccharacteristics of the coal basin and regional tectonic influence on the distribution of coalstrata and coal forming condition.Second, paleontology research of Jurassic coal-bearing strata in the study area hasmade important achievements, such as a large number of plants and pollen fossils,precious dinosaur fossils. Based on rock formations, fossils and other results research data,the stratigraphic sequence of Dananhu formation has been reclassified. Buried stratigraphic divided into Middle-Upper Triassic Xiaoquangou Group and Lower JurassicBadaowan, Sangonghe Formation which are regional coal-bearing strata. Re-determinedthe Jurassic stratigraphic sequence and the major coal-bearing stratigraphic units, andidentified the basement is Upper Permian Kulai Formation which is a set of lake faciesclastic.Third, circle the belt of coal accumulation and coal-rich center of the Turpan-HamiBasin. By analyzing the Paleogeographic evolution regulation, primarily summarized thecoal-forming environment differences and coal accumulation law in the different period ofEarly-Middle Jurassicl. At last delineate some coal-forming center in the coal basin suchas Aydin Lake, Shaerhu, Dananhu and so on.Forth, by collecting results of comprehensively evaluate Coal-bearing strata, structureand quality in Turpan Sag area，especially in recent years. Preliminarily established thecoal basin overall structural shape and acknowledge of Turpan-Hami.Fifth, through this research, worked out a kind of method which combining2Dseismic exploration, drilling, geophysical logging and sample analysis is an effective wayto coal assessment, especially in large areas of buried-half buried regions.