Tectonostratigraphic evolution of the Carboniferous arc-related basin in the East Junggar Basin, northwest China: Insights into its link with the subduction process

Yang, Xianyou; He, Dengfa; Wang, Qingchen; Tang, Yong

doi:10.1016/j.gr.2012.02.009

Cited by 51 publications

(29 citation statements)

References 83 publications

(128 reference statements)

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“…The depositional environment evolved from a shallow marine system in the Carboniferous to a coastal system in the Early Permian [19,20]. The Middle and Upper Permian series deposited in the alluvial fanfluvial to lacustrine environment are mainly non-marine clastic sediments [21,22]. During the Late Permian the Bogda Mountain area was in the extension rift setting and a deep to semi-deep lacustrine depositional environment [4,9,22,23] (Fig.…”

Section: Geological Settingmentioning

confidence: 99%

“…Normal alkanes of greater chain length are more difficult to be consumed by microorganisms. In view of this, the ratio of ∑nC 21 -/∑nC 22 + should decrease due to biodegradation. Since the kerogen of the YMS oil shale is mostly of Type III, suggesting a significant input of land-plant organic matter, the relatively high values of ∑nC 21 -/∑nC 22 + (0.55-2.87) for this oil shale may be the consequence of maturation.…”

Section: N-alkanes and Isoprenoidsmentioning

confidence: 99%

“…In view of this, the ratio of ∑nC 21 -/∑nC 22 + should decrease due to biodegradation. Since the kerogen of the YMS oil shale is mostly of Type III, suggesting a significant input of land-plant organic matter, the relatively high values of ∑nC 21 -/∑nC 22 + (0.55-2.87) for this oil shale may be the consequence of maturation. In addition, a study demonstrated that certain nonmarine algae, e.g., Scenedesmus quadricauda, Tetrahedron sp., Anacystis montana and Botryococcus braunii, produce a significant amount of both medium-and high-molecular-weight paraffins [38].…”

Section: N-alkanes and Isoprenoidsmentioning

confidence: 99%

“…In addition, a study demonstrated that certain nonmarine algae, e.g., Scenedesmus quadricauda, Tetrahedron sp., Anacystis montana and Botryococcus braunii, produce a significant amount of both medium-and high-molecular-weight paraffins [38]. Therefore, the simultaneous presence of the above algae in the SMG and SGH oil shale samples may explain their higher ratio of ∑nC 21 -/∑nC 22 + . The values of the odd-to-even preference ratio of n-alkanes (OEP) for samples Y-5, Y-4-8, Y-4-6 and Y-4-5 are 0.68, 0.82, 0.75 and 0.84, respectively.…”

Section: N-alkanes and Isoprenoidsmentioning

confidence: 99%

“…7), mainly n-C 20 to n-C 23 alkanes prevail, implying the contribution of non-marine brackish water algae or aquatic macrophytes [37,[40][41][42][43]. However, the ratio of ∑nC 21 -/∑nC 22 + for most of the SMG oil shale samples is lower than 1, suggesting the origin of lipids from higher plants [44][45][46][47]. Therefore, the oil shale of the SMG section may represent a mixed-source depositional environment including higher terrestrial plants, aquatic macrophytes and algae.…”

Section: N-alkanes and Isoprenoidsmentioning

confidence: 99%

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Source Rock Potential and Depositional Environment of Upper Permian Oil Shales of the Lucaogou Formation in the Southeastern Junggar Basin, Northwest China

Gao¹,

Wang²,

Peng³

et al. 2016

Oil Shale

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Section: Geological Settingmentioning

confidence: 99%

Section: N-alkanes and Isoprenoidsmentioning

confidence: 99%

Section: N-alkanes and Isoprenoidsmentioning

confidence: 99%

Section: N-alkanes and Isoprenoidsmentioning

confidence: 99%

Section: N-alkanes and Isoprenoidsmentioning

confidence: 99%

See 3 more Smart Citations

Source Rock Potential and Depositional Environment of Upper Permian Oil Shales of the Lucaogou Formation in the Southeastern Junggar Basin, Northwest China

Gao¹,

Wang²,

Peng³

et al. 2016

Oil Shale

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Characteristics and developmental mechanisms of mud volcanoes on the southern margin of the Junggar Basin, NW China

et al. 2014

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Mud volcanoes have provided much meaningful information about the deep Earth and the recent crustal and neotectonic movements in an area for over 200 years. However, the triggering mechanisms have puzzled geologists for a long time. This study investigated the factors controlling mud volcano activity and the triggering mechanisms of mud volcano eruptions on the southern margin of the Junggar Basin, NW China. The Baiyanggou, Aiqigou and Dushanzi mud volcanoes are all located along the Dushanzi Anticline, which belongs to the third anticline belt on the southern margin of the basin. The extensive, thick mudstone at depth provides a wealth of material for the formation of mud volcanoes. Simultaneously, the overpressure serves as the driving force for the eruption of the mud volcanoes. The torsional-compressional stress field created by the collision between the Indian and Eurasian plates not only enhanced the abnormal formational pressure in the region but also lead to the development of extensional faults in the core of the Dushanzi Anticline, which served as the conduits for the mud volcanoes. The continuous collision between the Indian and Eurasian plates and the regional torsional-compressional stress field may largely control the cyclical activity of the mud volcanoes and serve as their primary trigger mechanism.

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Geochemistry, Petrology, and U–Pb dating of high‐K volcanic rocks in wells WC‐1 and Y‐2 from the northern Junggar Basin, northwestern China: Implications for the closure of the Keramaili oceanic basin during the Carboniferous

et al. 2018

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Carboniferous volcanic rocks are widely distributed in the Junggar Basin and may provide a unique insight into the tectonic history of this basin. In this paper, we focus on the tectonic evolution of the northern Junggar Basin (NJB) using geochronological and geochemical data to establish the diachronous closure model for the Keramaili oceanic basin. The Lower Carboniferous strata in the eastern part (well WC‐1) and the Upper Carboniferous strata in the western part (well Y‐2) of the NJB are composed of a mix of compositional and rock‐type forms. These volcanic rocks are mostly high‐K assemblages characterized by high K (1.73–6.48%), high alkali (Na2O + K2O = 5.04–7.45%), and low TiO2 (0.57–1.06%). They also exhibit various REE concentrations (68.44–168.19 ppm), an enrichment of LREE (LaN/YbN = 4.54–8.09), and small negative Eu anomalies (δEu = 0.74–0.90). The depletion of HFSE and relevant tectonic setting discrimination diagrams demonstrate that these two volcanic associations were formed in a subduction‐related environment. The data also indicate that the high‐K volcanic rocks are derived from a mix of melted subducted sediments and mantle metasomatized by silica‐rich fluids. Although these two sets of volcanic rocks formed in Early and Late Carboniferous, the similar petrographic and geochemical natures suggest similar magma source and tectonic setting. Along with different regional tectonic settings in the NJB during the Carboniferous, we propose an asynchronous subduction of Keramaili oceanic basin, resulting in the inconsistent temporal and spatial distribution of Upper Carboniferous volcanic rocks in the NJB.

show abstract

Tectonostratigraphic evolution of the Carboniferous arc-related basin in the East Junggar Basin, northwest China: Insights into its link with the subduction process

Cited by 51 publications

References 83 publications

Source Rock Potential and Depositional Environment of Upper Permian Oil Shales of the Lucaogou Formation in the Southeastern Junggar Basin, Northwest China

Source Rock Potential and Depositional Environment of Upper Permian Oil Shales of the Lucaogou Formation in the Southeastern Junggar Basin, Northwest China

Characteristics and developmental mechanisms of mud volcanoes on the southern margin of the Junggar Basin, NW China

Geochemistry, Petrology, and U–Pb dating of high‐K volcanic rocks in wells WC‐1 and Y‐2 from the northern Junggar Basin, northwestern China: Implications for the closure of the Keramaili oceanic basin during the Carboniferous

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