New progresses on geothermal history of Turpan-Hami Basin, Xinjiang, China

A comprehensive study on geothermal history of the Turpan-Hami Basin by vit rinite reflectance, fluid inclusion geothermometry, apatite fission track a nd Ar-40-Ar-39 dating displays that the main effects influencing geotempera ture distribution are burial depth of the basement, heat flow, magmatic act ivities, as well as tectonic movement, having a rugulation to be higher in the east and north, lower in the west and south, as well as higher in the p ast and lower at the present. The heat of the mantle source and the Indo-Ch ina tectonic thermal event have extremely influenced maturation of source r ocks of the upper Lower Permian and the Middle and Upper Triassic in the In do-China epoch, While, the geothermal gradient and the weak tectonic geothe rmal event of the Early Yanshan Movement provided necessary heat for the ma turation of source rock in coal-bearing strata of the Middle and Lower Jura ssic.