Overpressure distribution and pressuring mechanism on the southern margin of the Junggar Basin, Northwestern China

Luo, Xiaorong; Lou-jun, Liu; Li, Xueyi

doi:10.1007/s11434-006-2126-9

Cited by 11 publications

(8 citation statements)

References 7 publications

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“…The basin margins, however, have been repeatedly deformed in response to successive accretion onto the south Asian margin (Hendrix et al 1992;Carroll et al 1995). Since Neogene, the Junggar Basin was reactivated as a foreland basin due to the collision of the Indian plate with the Eurasian plate (Hendrix et al 1994;Guo et al 2006;Luo et al 2006;De Grave et al 2007). This multiphase basin history and its intraplate position make it difficult to cast the Junggar Basin (and other nonmarine basins across China) into traditional classification schemes that emphasize plate-boundary interactions.…”

Section: Introductionmentioning

confidence: 99%

“…Benefiting from geophysical exploration and petroleum drillings, more and more information about the sedimentary accumulation and basin evolution was obtained (e.g. Chen et al 2002;Luo et al 2006;Song 2006;Zou et al 2007;Feng et al 2008;Kang 2008;Liu et al 2008;Qu et al 2008;Zhu et al 2008;Wu et al 2009). In particular, we collected well information from the Xinjiang Oilfield Company including cutting logs of 150 wells and a stratigraphic framework of 520 wells and revised existing facies maps.…”

Section: Introductionmentioning

confidence: 99%

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Sedimentary and palaeoenvironmental evolution of the Junggar Basin, Xinjiang, Northwest China

Wei-hua

Hornung

Liu

et al. 2010

Palaeobio Palaeoenv

105

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This review paper summarizes the sedimentary and palaeoenvironmental evolution of the Junggar Basin in Northwest China largely based on hardly accessible Chinese language papers, and complemented by own field observations and a critical survey of key sediment cores from petroleum wells. We have combined this information and updated existing lithofacies and isopach maps for characteristic time slices of basin evolution and palaeoenvironmental change. The Junggar Basin was initiated during the late stage of collisional tectonics in the southern Central Asian Orogenic Belt (Altaids) since the Early Permian. According to studies in surrounding mountain chains and geophysical surveys, the basement consists of a collage of oceanic basins, intraoceanic island arcs, and microcontinents of Precambrian to Palaeozoic age. The basin fill is subdivided into three tectonically controlled stratigraphic sequences which are separated by two regional angular unconformities. The first cycle in the Permian and Triassic is characterized by an Early Permian extensional strike-slip and a Late Permian to Triassic compressional foreland setting. After an Early Permian marine regression, persistent nonmarine fluvio-lacustrine conditions were established containing probably the thickest organic-rich mudstone interval in the world, which act as major source rocks of the basin. Starting with four depocenters, the basin was unified during the Triassic. The preserved total maximum thickness of this cycle is about 8,500 m in the southern depocenter. During the second intracontinental depression cycle, subsidence slowed down and the depocenter migrated towards the basin center reaching a maximum thickness of 6,000 m. The palaeoenvironment was dominated by a large oscillating freshwater lake receiving changing quantities of clastic sediments from the surrounding mountain ranges and forming alluvial fans, braid plains, and deltas partly containing coal seams of economic interest. Sedimentary facies, pollen, and palaeobotanical plant fossils show an overall aridization trend and a shrinking lake cover. During the Neogene cycle, the depocenter migrated back to the south and the former asymmetric foreland basin was reactivated due to thrusting and rapid uplift of the Tian Shan. The maximum thickness of these molasse-type deposits exceeds 5,000 m. Despite its strong potential, there is still a lack of high resolution bio-and cyclostratigraphy, sequence stratigraphy, and palaeoclimate studies in the Junggar Basin to elucidate local versus regional palaeoenvironmental patterns and to better constrain fardistance tectonic forcing.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sedimentary and palaeoenvironmental evolution of the Junggar Basin, Xinjiang, Northwest China

Wei-hua

Hornung

Liu

et al. 2010

Palaeobio Palaeoenv

105

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“…Luo et al . (, ) have demonstrated the presence of abnormal overpressure along the southern margin of the Junggar Basin, particularly in the second and third anticline belts, within the Neogene Taxihe Formation. The Shawan Formation, the Palaeogene Anjihaihe Formation, the Ziniquanzi Formation, the Cretaceous Donggou Formation, the Tugulu Group, and parts of the Jurassic and Triassic formations comprise a sequence that ranges in thickness from 900 to 4000 m. The overpressure is closely related to a combination of sedimentary processes and tectonic activity.…”

Section: Discussion Of the Formation Mechanism Of Mud Volcanoesmentioning

confidence: 98%

“…The lateral force of compression from the piedmont tectonic belt contributes to some extent to the rapid increase in overpressure and constitutes another important factor (Luo et al . , ; Cai, ).…”

Section: Discussion Of the Formation Mechanism Of Mud Volcanoesmentioning

confidence: 99%

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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“…6). The measured pressure coefficient is generally greater than 2.0 (Wu et al, 2007;Luo et al, 2004). In this period, the Cretaceous-sourced petroleum migrated and accumulated in the overpressure compartment.…”

Section: Petroleum Migration and Accumulationmentioning

confidence: 99%

Complex petroleum migration and accumulation in central region of southern Junggar basin, Northwest China

et al. 2010

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The central region of the southern Junggar basin (Northwest China) is a key exploration target in this petroliferous basin. As there are four sets of potential source rocks (e.g., Permian, Jurassic, Cretaceous and Paleogene sequences), petroleum migration and accumulation are likely complex. This study represents an attempt to understand this complexity in order to provide fundamental information for future regional petroleum exploration and geological studies. Based on petroleum geology and geochemistry, it is implied that there are mainly three types of hydrocarbons, including Cretaceous-and Paleogene-sourced oils (with the former being dominant) and Jurassic-sourced gas. The petroleum migration and accumulation mainly cover three stages. The first stage is the late period of the Early Pleistocene, in which the Cretaceous-sourced oils migrate and accumulate. Then, in the second stage (from the late period of the Middle Pleistocene to the early period of the Late Pleistocene), the Cretaceoussourced oils, together with the Paleogene-sourced oils, participate in the migration and accumulation. At last, in the end of the Late Pleistocene, large quantities of oils remigrate and accumulate, with gas (especially Jurassicsourced gas) migrating along faults to accumulate. Thus, petroleum charge events in the area are complex, reflecting the control of complex tectonic evolution on petroleum migration and accumulation.

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Overpressure distribution and pressuring mechanism on the southern margin of the Junggar Basin, Northwestern China

Cited by 11 publications

References 7 publications

Sedimentary and palaeoenvironmental evolution of the Junggar Basin, Xinjiang, Northwest China

Sedimentary and palaeoenvironmental evolution of the Junggar Basin, Xinjiang, Northwest China

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

Complex petroleum migration and accumulation in central region of southern Junggar basin, Northwest China

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