摘要
文章以塔里木盆地东北缘库鲁克塔格隆起与孔雀河斜坡盆山系统为主要研究对象,在该地区露头和钻井样品开展碎屑磷灰石、锆石裂变径迹研究,对库鲁克塔格构造演化中关键构造事件提供热年代学约束.锆石样品在加里东晚期-早海西期达到最大古地温,之后经历了长期的抬升降温过程,锆石最小峰值年龄记录了371～392Ma和328～305.7 Ma二次构造抬升年龄;在晚侏罗-晚白垩世,样品逐渐退出磷灰石部分退火带底界,磷灰石裂变径迹记录了134.5～164 Ma、73～100 Ma和35.4 Ma三次构造抬升事件年龄,其中73～100 Ma为主要构造抬升年龄.海西期构造事件年龄反映了孔雀河斜坡由沉降转入剥蚀演化阶段,对油气藏的形成具有重要意义;晚白垩世构造事件则反映了库鲁克塔格山的强烈隆升.
This paper focuses on the study of basin-and-range relations about Kongquehe slope and Kuruketage uplift. Thermochronology constraints were made to the key tectonic events in the Kuruketage tectonic evolution history, using the methods of detrital zircon and apatite fission track, sampled from outcrop area and well cores. The time of the maximum palaeotemperature from zircon samples was determined during late-Caledonian to early-Hercynian cycle, and from then on, the samples experienced the procedure of tectonic uplifts and temperature drop times. Two thermochronology ages of zircon fission track were recorded, which reflect two tectonic events happened in 371-392 Ma and 328-305.7 Ma. Three later tectonic uplifting events were recorded by apatite fission track, whose thermochronology ages are 134.5-164 Ma, 73-100 Ma and 35.4 Ma respectively, after the oalaeotemoerature of samnle wns decreasd out of the partial annealing zone＇s base level. The Hercynian ages from the zircon samples transformation from subsidence to uplift in the Kongquehe slope, which is reservoir formations, and the late-Cretaceous tectonic event showed by reflects intense uplifting of the Kuruketage Mount. indicate the tectonic significant to oil-gas the apatite samples
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2011年第3期817-827,共11页
Chinese Journal of Geophysics
基金
国家科技重大专项项目(2008ZX05005-004-08HZ)
国家自然科学基金项目(40902042)资助
