Characteristics and Origin of the “Seesaw Type” Negative Inversion Structure in the Yabulai Basin of the Alxa Block

doi:10.19657/j.geoscience.1000-8527.2023.117

Abstract

Abstract:

The Yabulai Basin is located in the Alxa Block and experienced intra-plate tectonic events since the Mesozoic Era. The Jurassic sediments are controlled by the NE-SW reverse faults, forming a compressional depressed basin with reverse fault patterns including imbricate fans, back-thrust, ramp structure, pop-up anticlines, and faulted anticlines. This compressional stress originated from the subduction of the Okhotsk Ocean and the Paleo-Pacific Ocean beneath the Eurasian plate. Lower Cretaceous sedimentation is controlled by the Yabulai normal fault, forming an extensional faulted depression basin with northwest faulting and southeastern overlap. Fault assemblages such as stepped, domino, and conjugate styles developed, and stresses resulting from the rollback of Pacific plate subduction. The Jurassic compressional basin and the Cretaceous extensional basin superimposed in opposite directions to form a “seesaw type” negative inversion structure. Since the Cenozoic Era, the subduction and collision of the Indian Plate with the Eurasian continental plate has caused the Beidashan fault to thrust northward over the Jurassic basin, leading to the sinistral slip of the Yabulai piedmont fault. The results of analogue models show that the superposition of bidirectional compression and unidirectional extension is the main factor controlling the structural patterns in the Yabulai Basin.

Key words: Alxa Block, Yabulai Basin, negative inversion structure, tectonic evolution, analogue modeling

CLC Number:

SHI Yuanpeng, DAN Weining, YU Fusheng, WANG Shaochun, WANG Xufeng, TIAN Ye, FENG Guangye, WANG Haoyu, WANG Biao. Characteristics and Origin of the “Seesaw Type” Negative Inversion Structure in the Yabulai Basin of the Alxa Block[J]. Geoscience, 2024, 38(05): 1221-1234.

Figures/Tables 10

Fig.1 Map of tectonic unit division in the Alxa block and Yabulai Basin[3-4]

Fig.2 Comprehensive histogram of the sedimentary sequence in the Yabulai Basin

Fig.3 Superposition map of syn-depositional faults and thickness in the Yabulai Basin

Fig.4 Seismic interpretation profiles across the Yanchang and Xiaohu subsags in the Yabulai Basin

Fig.5 Seismic interpretation profiles across the Suotuo subsag in the Yabulai Basin

Fig.6 Strike-slip deformation patterns along the Yabulai fault in the outcrop area

Fig.7 Tectonic evolution model of the Yanchang subsag in the Yabulai Basin

Fig.8 Genetic and evolutionary model of the Yabulai Basin

Fig.9 Schematic diagram of the experimental model

Fig.10 Comparison of experimental simulation results and seismic profile interpretations between the two groups

References 29

[1]	杨波, 侯军, 陈海清, 等. 雅布赖中生代叠合盆地特征及勘探方向[J]. 石油地球物理勘探, 2018, 53(2): 314-320.
[2]	郑孟林, 李明杰, 曹春潮, 等. 北山—阿拉善地区白垩纪、侏罗纪盆地叠合特征[J]. 大地构造与成矿学, 2003, 27(4): 384-389.
[3]	聂晶, 胡欣. 北祁连盆地群构造运动特征[J]. 四川地质学报, 2013, 33(3): 262-265.
[4]	钟玮, 林常梅, 吴超, 等. 雅布赖盆地中生代构造特征[J]. 四川地质学报, 2013, 33(1): 7-11.
[5]	吴晓智, 王桂君, 郑民, 等. 雅布赖盆地构造演化与油气聚集[J]. 地质科学, 2015, 50(1): 74-87.
[6]	白玉宝. 内蒙古西部盆地构造特征及其含油气远景[J]. 西安石油学院学报(自然科学版), 1996, 3(2): 15-18.
[7]	陈发景, 汪新文. 中国西北地区早—中侏罗世盆地原型分析[J]. 地学前缘, 2000, 7(4): 441-448.
[8]	张贵宾,MARTIN H P B. 中国西北地区早—中侏罗世盆地原型分布[J]. 地学前缘, 2000, 7(4): 459-469.
[9]	冯益民, 吴汉泉. 北祁连山及其邻区古生代以来的大地构造演化初探[J]. 西北地质科学, 1992(2): 61-73.
[10]	靳久强, 赵文智, 薛良清, 等. 中国西北地区侏罗纪原型盆地与演化特征[J]. 地质论评, 1999, 45(1): 92-104.
[11]	李明杰, 郑孟林, 曹春潮, 等. 北山—阿拉善地区侏罗—白垩纪盆地的叠合演化[J]. 石油与天然气地质, 2004, 25(1): 54-57.
[12]	郑孟林, 曹春潮, 李明杰, 等. 北山—阿拉善地区侏罗纪盆地构造特征及其演化[J]. 世界地质, 2003(2): 124-128.
[13]	吴茂炳, 刘春燕, 郑孟林, 等. 内蒙古西部雅布赖盆地侏罗纪沉积-构造演化及油气勘探方向[J]. 地质通报, 2007, 26(7): 857-863.
[14]	赵子贤. 祁连山东北缘晚新生代沉积-构造-地貌演化过程[D]. 北京: 中国地质科学院, 2021.
[15]	俞晶星. 阿拉善地块南部构造活动及其对周边地块相互作用的响应[J]. 国际地震动态, 2017(12): 40-41.
[16]	俞晶星. 雅布赖山前断裂晚第四纪滑动速率与古地震[D]. 北京: 中国地震局地质研究所, 2013.
[17]	朱光, 陆元超, 苏楠, 等. 华北克拉通早白垩世地壳变形规律与动力学[J]. 中国科学(地球科学), 2021, 51(9): 1420-1443.
[18]	孟庆任, 胡健民, 袁选俊, 等. 中蒙边界地区晚中生代伸展盆地的结构、演化与成因[J]. 地质通报, 2002, 21(4): 224-231.
[19]	MENG Q R. What drove Late Mesozoic extension of the Northern China-Mongolia tract?[J]. Tectonophysics, 2003, 369(3/4): 155-174.
[20]	LI Y, XU W L, TANG J, et al. Geochronology and geochemistry of Mesozoic intrusive rocks in the Xing’an Massif of NE China: Implications for the evolution and spatial extent of the Mongol-Okhotsk tectonic regime[J]. Lithos, 2018, 304/305/306/307: 57-73.
[21]	KRAVCHINSKY V A, COGNÉ J P, HARBERT W P, et al. Evolution of the Mongol-Okhotsk Ocean as constrained by new palaeomagnetic data from the Mongol-Okhotsk suture zone, Siberia[J]. Geophysical Journal International, 2002, 148(1): 34-57.
[22]	左国朝, 刘义科, 李相博. 蒙甘青宁地区侏罗纪开合盆山构造格局及原型盆地沉积特征[J]. 地质通报, 2004, 23(3): 261-272.
[23]	郝士龙, 李成禄, 丁继双, 等. 黑龙江多宝山地区中侏罗世火山岩的发现及其对蒙古—鄂霍茨克洋闭合范围的限定[J]. 地质通报, 2021, 40(10): 1757-1772.
[24]	张国宾, 孔金贵, 吴子杰, 等. 蒙古—鄂霍次克洋早侏罗世构造演化: 来自大兴安岭北段新立屯地区花岗岩的证据[J]. 现代地质, 2023, 37(2): 404-418.
[25]	刘少峰, 林成发, 刘晓波, 等. 冀北张家口地区同构造沉积过程及其与褶皱-逆冲作用耦合[J]. 中国科学(地球科学), 2018, 48(6): 705-731.
[26]	YU F S, ZHANG R F, YU J F, et al. Meso-Cenozoic negative inversion model for the Linhe Depression of Hetao Basin, China[J]. Geological Magazine, 2022, 159(4): 535-560.
[27]	DARBY B J, RITTS B D. Mesozoic structural architecture of the Lang Shan, North-Central China: Intraplate contraction, extension, and synorogenic sedimentation[J]. Journal of Structural Geology, 2007, 29(12): 2006-2016.
[28]	YANG X Y, DONG Y P. Mesozoic and Cenozoic multiple deformations in the Helanshan Tectonic Belt, Northern China[J]. Gondwana Research, 2018, 60: 34-53.
[29]	侯旭波, 尹克敏, 林中凯, 等. 银川盆地构造反转及其演化与叠合关系分析[J]. 高校地质学报, 2014, 20(2): 277-285.