Timing of Cenozoic Intense Deformation and Its Implications for Petroleum Accumulation, Northern Margin of Tianshan Orogenic Belt, Northwest China

Basin evolution in a folding lithosphere: Altai–Sayan and Tien Shan belts in Central Asia

“…In Northwest Tien Shan, basin analysis shows that intense tectonism started 7-10 Ma ago (Fang et al, 2007). A cooling event at 20-10 Ma was recorded in the Kalpin uplift at the northwestern edge of the Tarim basin and interpreted as of tectonic origin (J.…”

Factors Controlling Natural Gas Accumulation in the Southern Margin of Junggar Basin and Potential Exploration Targets

“…Total 45 traps have been identified to date in the middle-shallow structural layers of the piedmont thrust belt (Li et al, 2003), and 40-46 traps have been preliminarily identified in the deep layer (Lei et al, 2012;Du et al, 2019), of which 21 traps in the deep layer were confirmed, with a total trap area of 2,486 km 2 . Most of these traps are anticlines that were formed during the Neogene period (Hendrix et al, 1994;Deng et al, 1999;Fang et al, 2005;Hu et al, 2005;Guo et al, 2006;Du and Wang, 2007;Fang et al, 2007) and are similar to those in the Kuqa Depression. The trap formation time in the southern margin of Junggar Basin matched well with the time of gas generation from the Jurassic coal-measures, which is also similar to that in the Kuqa Depression.…”

“…The Kuqa Depression of Tarim Basin and the southern margin of Junggar Basin are located on south and north sides of the Tianshan Mountains, respectively, with similar sedimentary cap rocks and tectonic evolution history in respect to petroleum geological background (Hendrix et al, 1994;Li et al, 2000;Kuang and Liu, 2001;Liang et al, 2002;Liang et al, 2004;Fang et al, 2005;Kuang and Jia, 2005;Kuang and Qi, 2006;Fang et al, 2007;He et al, 2009). Many large gas fields have been discovered to date in the Kuqa Depression, such as KL-2, Dabei, Keshen and Dina gas fields (Wang, 2014).…”

“…The southern margin of Junggar Basin started to uplift greatly since Miocene (25 Ma). Therefore, the anticline structures in this area were developed very late (Fang et al, 2005;Hu et al, 2005;Guo et al, 2006;Du and Wang, 2007;Fang et al, 2007). The Qigu anticline and other anticlines in the first row were formed before ∼10-7 Ma; the Horgos anticline and other anticlines in the second row were formed before 3-1.5 Ma; the Anjihai anticline and other anticlines in the third row were formed before 1 Ma, while the Hutubi and Xihu anticlines etc.…”

“…However, no great breakthrough occurred in last several decades in terms of oil and gas exploration in this area. On the other hand, the southern margin of Junggar Basin and the Kuqa Depression of Tarim Basin, located on the north and south sides of the Tianshan Mountains respectively, share very similar sedimentary stratigraphy and tectonic evolution history (Fang et al, 2005;Fang et al, 2007;He et al, 2009;Wang, 2014). A breakthrough of natural gas exploration in the Kuqa Depression of Tarim Basin has been achieved in last 3 decades, including the discovery of large gas fields KL-2, Dabei, Dina, Keshen, and others (Wang, 2014).…”