Jueluotage Belt And The Southern Margin Of Turpan-Hami Basin Carboniferous Structure-lithofacies Palaeogeography

Jueluotage tectonic belt located in the middle of the Turpan-Hami Basin and the Tianshan tectonic belt, the belt width of 30-50km, more than 600km long. The Carboniferous orogenic is an important period of structural change. Because the Turpan-Hami basin and adjacent Carboniferous lack of studies of the region, and thus for the stratigraphic classification and controversial issues have little research. In this paper, use the stratigraphy, sedimentology, geochemistry, paleontology and tectonics theory and basic research methods as a guide, approach to the southern margin of the Turpan-Hami basin and mountain belt Jueluotage, Carboniferous reflect the activities carried out on the thinking of the structure - lithofacies paleogeography.The investigation and measure of the four outcrops in research region, combined with paleontology and isotopic dating of the sedimentary facies analysis division and lateral contrast, established a facies model, mainly marine delta - neritic - Combination shelf and delta - tidal - shallow water - plays deep - deep-sea basin faciesIn the Dikaner and Xidagou section firstly found Permian fossils Bartschat key representatives of leaves (Noeggrathiopsis batschatensis) plant fossils, to judge the Junggar block (including vomit Hami Basin) collision between the Siberian plate has docked, the ancient Asian archipelagic ocean no longer exists. Combined with the major groove of the Ya-Man Soviet Union and Eastern end of the Late Carboniferous Canale Group pillow lava and geochemistry of volcanic rock assemblage types, studies show that the Later Carboniferous volcanic rocks in the area has a continental rift volcanic rock geochemical characteristics, Later Carboniferous in the eastern part of the study area after a large-scale orogenic extensional plate rift tectonic setting.Through the study of the paleogeography that in the Early Carboniferous transgression through a gradual process, and volcanic, sedimentary types of diversity, mainly in littand shallow marine facies, the early Carboniferous rocks include the acid volcanic rocks and pyroclastic rocks, the late Early Carboniferous lithology is gray, gray and black folder tuffaceous carbonate clastic sediments, with abundant shallow marine fossils; Late Carboniferous, accompanied by some area regression, littoral and shallow marine facies types is reduced, and marine tidal delta phase expanded main lithology is dominated by clastic tuffaceous mudstone, limestone, siliceous rocks.