New discovery and geological significance of Late Silurian–Carboniferous extensional structures in Tarim Basin

Li, Yuejun; Liu, Wen; Yang, Haijun; Zhang, Guangya; Shi, Jun Yi; Peng, Gang; Hu, Jianfeng; Luo, Jing; Huang, Zhibin; Chen, Yangui; Zhang, Qiang

doi:10.1016/j.jseaes.2014.11.020

Cited by 29 publications

(15 citation statements)

References 25 publications

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“…However, the reliability of the two ages is unknown since the original data and the details of the method were not provided. In addition, recent interpretations of seismic data in the middle and northern Tarim have revealed Ordovician to Middle Silurian compressional structures and Late Silurian to Carboniferous extensional structures [ Li et al ., ]. This is consistent with our suggestion of the Late Silurian lithospheric extension and the Early Devonian back‐arc opening of the South Tianshan Ocean.…”

Section: Discussionsupporting

confidence: 92%

Paleozoic accretionary orogenesis in the Paleo-Asian Ocean: Insights from detrital zircons from Silurian to Carboniferous strata at the northwestern margin of the Tarim Craton

et al. 2015

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A detrital zircon U-Pb and Lu-Hf isotopic study was carried out in the Middle Silurian to Late Carboniferous sedimentary strata of the northwestern Tarim Craton in order to understand accretionary processes in the southern part of the Central Asian Orogenic Belt. Detrital zircons from these strata yielded U-Pb ages clustering around 2.8-2.3 Ga, 2.0-1.7 Ga, 1.3-0.9 Ga, 880-600 Ma, and 500-400 Ma, with age populations and Hf isotopic signatures matching those of magmatic rocks in the Tarim Craton and the Central Tianshan Block. Abundant 500-400 Ma detrital zircons most likely reflect deposition in a retroarc foreland basin inboard of an Andean-type magmatic arc to the north, supporting the northern Tarim-Central Tianshan connection during early Paleozoic time. The absence of 380-310 Ma zircon population in the Carboniferous siliciclastic rocks suggests that the Central Tianshan Block may have been separated from the Tarim Craton in the Early Devonian, caused by the interarc/back-arc opening of the South Tianshan Ocean. We propose an accretionary orogenic model switching from advancing to retreating mode during Paleozoic time in the southwestern part of the Paleo-Asian Ocean. This transition most likely occurred coevally with the rifting of Southeast Asian blocks from the northeastern margin of Gondwana.

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Section: Discussionsupporting

confidence: 92%

Paleozoic accretionary orogenesis in the Paleo-Asian Ocean: Insights from detrital zircons from Silurian to Carboniferous strata at the northwestern margin of the Tarim Craton

et al. 2015

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“…The calculating equation is

Ei = normalH 1 / H2,

where Ei is the growth index, H1, the stratigraphic unit thicknesses on the downthrown side, and H2, the unit thickness on the upthrown side. If Ei = 1, it indicates that the stratigraphic unit thicknesses on the both sides of a fault are equal and signifying that during the deposition of the stratigraphic unit, the fault was not active; for Ei > 1, it shows that the stratigraphic unit thickness on the downthrown side is larger than that on the upthrown side and reveals that the fault was active during the deposition of the stratigraphic unit (Li, Wen, Yang, et al, ). The larger the value of Ei means the stronger activity of the fault.…”

Section: Methodsmentioning

confidence: 88%

“…Tarim Basin, located on the south of the South Tianshan Mountains, is a large Meso‐Cenozoic sedimentary basin on the Tarim Craton with Precambrian crystalline basement and Phanerozoic sedimentary cover. It is covered by the well‐known Taklamakan Desert (Bureau of Geology and Mineral Resources of Xinjiang Uygur Autonomous Region, ; Jia, Yang, Chen, & Wei, ; Jia, Yao, Gao, Zhou, & Wei, ; Li, Wen, Yang, et al, ; Li, Zhang, et al, ; Xiao, Han, et al, ). The South Tianshan is the southern branch of the Tianshan Mountains.…”

Section: Geological Settingmentioning

confidence: 99%

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The collision‐related structures revealed in the northern Tarim Basin and their geological significance

Liu

et al. 2019

Geological Journal

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The South Tianshan on the southern margin of the Central Asian Orogenic Belt (CAOB) is a collisional orogenic belt between the Tarim continent and Ili‐Central Tianshan volcanic arc. The initial time of the collision remains debated, with proposed timing from Early Devonian to Middle Triassic. Almost all the previous studies on this collision were carried out within the South Tianshan Mountains, few within the related basins. End Permian–Triassic thrusts and Jurassic–Cretaceous normal faults were discovered in the northern Tarim Basin where is the southern piedmont of the South Tianshan Mountains after careful and systematic seismic interpretation. The end Permian–Triassic thrusts are constituted by both basement‐involved and thin‐skinned thrusts. They are likely seen as the syn‐collision compressional structures of the South Tianshan collisional orogen. The syn‐collision thrusts constitute the main faults in the study area. Consistent with the Triassic/Permian and Jurassic/Triassic unconformities, two thrusting phases occurred, at end Permian–beginning Triassic and end Triassic–beginning Jurassic, respectively. The Jurassic–Cretaceous normal faults usually arrange into stair‐step or graben‐horst structures in profile and en echelon normal fault zones horizontally. They are attributed as the results of the regional extensional stage in the CAOB. This regional extension stage provides a good constraint for the ending time of the collision between Tarim and Ili‐Central Tianshan blocks. The normal faulting time is revealed by normal fault growth indexes. According to these observed syn‐collision compressional and subsequent extension structures, it can be fairly inferred that the collision between Tarim and Ili‐Central Tianshan was initiated at end Permian, lasted through the Triassic and ceased at end Triassic, and then evolved into the Jurassic–Cretaceous extensional tectonic stage.

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“…The Silurian Kepingtage Formation in Tazhong area, Tarim Basin, is regarded as a typical marine clastic reservoir and widely concerned as main exploration target (Lv Xiuxiang et al, 2008;Zhang et al, 2008;Pang et al, 2012;Li et al, 2015). Previous studies suggested that it has an obvious acid-sensitive effect.…”

Section: Controls Of Acid-sensitive Minerals On Reservoir Sensitivitymentioning

confidence: 99%

Controls of Acid‐sensitive Minerals on Reservoir Sensitivity Testing: An Example from the Silurian Kepingtage Formation in Tazhong Area, Tarim Basin

Han

Wang

et al. 2018

Acta Geologica Sinica (Eng)

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The Silurian Kepingtage Formation in Tazhong area is regarded as an acid‐sensitive hydrocarbon reservoir. However, formation mechanism of acid‐sensitive of the reservoir cannot be interpreted by the existing acid‐sensitive evaluation criterion based on damage rate. The contents of acid ‐sensitive minerals illustrated by bulk‐rock XRD, scanning electron microscopy and clay mineral composition analysis exert the dominant control on acid‐sensitive flow testing of the reservoir. The iron‐ bearing minerals (including pyrite cements and chlorite cements) mainly deteriorate reservoir quality, while the iron‐free minerals (including calcite cements and dolomite cements) mainly improve permeability. The permeability variation of the tested samples is controlled by the relative content of two acid‐sensitive minerals. On the basis of newly established sensitivity mechanism and its influence on permeability, the corresponding ion (Fe2+) stabilizer was added to the acidizing fluids during the acidification reconstruction, which inhibited the negative factors of acid‐sensitive minerals and improved the target layer quality effectively.

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New discovery and geological significance of Late Silurian–Carboniferous extensional structures in Tarim Basin

Cited by 29 publications

References 25 publications

Paleozoic accretionary orogenesis in the Paleo-Asian Ocean: Insights from detrital zircons from Silurian to Carboniferous strata at the northwestern margin of the Tarim Craton

Paleozoic accretionary orogenesis in the Paleo-Asian Ocean: Insights from detrital zircons from Silurian to Carboniferous strata at the northwestern margin of the Tarim Craton

The collision‐related structures revealed in the northern Tarim Basin and their geological significance

Controls of Acid‐sensitive Minerals on Reservoir Sensitivity Testing: An Example from the Silurian Kepingtage Formation in Tazhong Area, Tarim Basin

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