Provenance and diagenesis of the Upper Jurassic Qigu Formation sandstones in the southern Junggar Basin, NW China

Wen, Hao; Jiang, Yanxia; Huang, Hu; Liu, Yapeng; Wang, Tao; Jiang, Yiqin; Jin, Jun; Qi, Liqi

doi:10.1007/s12517-016-2483-x

Cited by 3 publications

(3 citation statements)

References 43 publications

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“…It exhibits low geothermal gradients, low terrestrial heat flow (Rao et al, 2014), and a thick sedimentary sequence of Mesozoic and Cenozoic units, up to 14 km deep along its southern margin (Tang et al, 1997), contributed mainly by the rising Tianshan. This late event converted the basin into a present-day foreland basin (Wen et al, 2016). Our study region encompasses the JB, the WJ, and the Chinese Northwest Tianshan (CNT), which are main components of the southwestern CAOB.…”

Section: Geological Backgroundmentioning

confidence: 99%

“…After the termination of subduction in the late Paleozoic, marine sedimentation ceased, and the JB started to be filled with continental sedimentary rocks (Zheng et al, 2007;Xu et al, 2013;Figure 11b). During the collision of the Eurasian and Indian continents in the Cenozoic, the JB experienced rapid subsidence and deposition and attained its modern "foreland" basin characteristics (Yin, 2010;Bian et al, 2010;Wen et al, 2016). This recent tectonism also produced some shortening of the Mesozoic-Cenozoic sedimentary units and may have contributed, allegedly uncertain, to the overall thickening of the entire crust (Zhao et al, 2003;Luo et al, 2007;Figure 11c).…”

Section: 1029/2019jb018302mentioning

confidence: 99%

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The Deep Lithospheric Structure of the Junggar Terrane, NW China: Implications for Its Origin and Tectonic Evolution

Zhang

Afonso

et al. 2019

JGR Solid Earth

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The Central Asian Orogenic Belt (CAOB) is one of the world's largest and oldest accretionary orogens. The Junggar Terrane, located in the southwestern CAOB, is considered a key tectonic element to understand the evolution of the whole CAOB. However, given the lack of xenoliths and limited geophysical data with sensitivities to mantle depths, the nature of its basement and its deep lithospheric structure are still highly debated. Here we use a probabilistic inverse method to jointly invert newly processed Rayleigh wave dispersion data, surface heat flow, geoid anomalies, and absolute elevation. The output is a 3-D model of the seismic, temperature, bulk density, and compositional structure of the whole lithosphere beneath the western part of the Junggar Terrane. Our results reveal a subduction-shaped mantle anomaly beneath the western flank of the Junggar Basin that resembles closely the structure of a fossil subduction zone. We also confirm the presence of a thick lower crust beneath the basin with properties similar to those of basaltic rocks. On account of these results, we further conduct a hypothesis test and demonstrate that an "oceanic model" for the origin of the basement of the Junggar Basin explains the available geophysical and geochemical information better than other alternative models. Based on all these observations, we propose an evolutionary model for the western Junggar Terrane that reconciles a number of previously conflicting interpretations.

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Section: Geological Backgroundmentioning

confidence: 99%

Section: 1029/2019jb018302mentioning

confidence: 99%

The Deep Lithospheric Structure of the Junggar Terrane, NW China: Implications for Its Origin and Tectonic Evolution

Zhang

Afonso

et al. 2019

JGR Solid Earth

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“…The diagenesis of coal measure sandstone is strongly influenced by the thermal evolution of coal seams and dark shale [7,8]. Previous studies on sandstone reservoirs have mainly focused on the mechanism of pore throat formation, quantitative characterization of pore throats, and the relationship between oil and gas intrusion and reservoir diagenesis of sandstone reservoirs in different zones or layers within the basin [38][39][40][41][42][43]. However, studies on the coal-bearing sandstones of the Middle Jurassic Xishanyao formation have also focused on the evolution of the sedimentary environment, the classification of reservoir types, and the classification and evaluation of reservoirs [2,4,[44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

The Study on Diagenetic Characteristics of Coal Measures Sandstone Reservoir in Xishanyao Formation, Southern Margin of the Junggar Basin

et al. 2022

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The reservoir physical properties, pore types, diagenetic characteristics and reservoir quality controlling effect of the Xishanyao formation coal measure sandstone in the southern margin of the Junggar basin were discussed in this study based on thin section observation, high pressure mercury injection, low-temperature nitrogen adsorption and scanning electron microscope observation. The result shows that the porosity and permeability of the sandstone are generally low with a medium-high texture maturity and low compositional maturity. The sandstone storage space is mainly composed of residual intergranular pores, secondary dissolution pores, inter-crystalline pores and micro-fractures. The diagenetic stage of coal measure sandstone is in the mesodiagenesis A1-A2 stage, and their diagenetic interaction types mainly include compaction, cementation and dissolution. The reservoir quality of the coal measure sandstone deteriorates by compaction due to high matrix content and plastic debris content. Because of the large amounts of organic acids generated during the thermal evolution of the coal measure source rock, the coal measure sandstone suffers from strong dissolution. The secondary dissolution pores formed by the massive dissolution of feldspar, lithic fragments and early carbonate cementation in the sandstone significantly improved the reservoir quality. In the coal measure sandstone, clay mineral cementation is the most developed cementation form, followed by quartz cementation and carbonate cementation. Although kaolinite cementation and dolomite cementation can generate a small number of inter-crystalline pores, cementation deteriorates the reservoir quality. The Xishanyao formation coal measure sandstone formed in a lacustrine-delta environment, and its composition and texture make it susceptible to the influence of compaction and dissolution during diagenesis.

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Sedimentology, geochemistry and chronology of Jurassic in the Ganzi-Litang ophiolite mélange belt of Xinlong area, Sichuan and its tectonic setting

SongTao¹,

LiDong²,

Wu³

et al. 2022

Acta Petrologica Sinica

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Provenance and diagenesis of the Upper Jurassic Qigu Formation sandstones in the southern Junggar Basin, NW China

Cited by 3 publications

References 43 publications

The Deep Lithospheric Structure of the Junggar Terrane, NW China: Implications for Its Origin and Tectonic Evolution

The Deep Lithospheric Structure of the Junggar Terrane, NW China: Implications for Its Origin and Tectonic Evolution

The Study on Diagenetic Characteristics of Coal Measures Sandstone Reservoir in Xishanyao Formation, Southern Margin of the Junggar Basin

Sedimentology, geochemistry and chronology of Jurassic in the Ganzi-Litang ophiolite mélange belt of Xinlong area, Sichuan and its tectonic setting

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