Title: The Controlling of Altyn Structural Belt on Petroleum Geology of the Southeastern Part of the Tarim Basin,NW China
Abstract: Altyn structural belt consists of collisional orogenic belt and thrusting strike-slip fault systems.Altyn orogenic belt is the oldest collisional orogenic belt around the Tarim basin so far.The peak-stage collisional orogeny characterized by the high-ultrahigh pressure metamorphism took place in the late Cambrian-early Ordovician.Such collisional orogeny likely resulted in uplifting obviously of the adjacent southeastern Tarim basin,and eroding of the Middle and Upper Ordovician strata.As a result,uplifting is not only disadvantageous for sedimentary materials to deposit in the southeastern part of the Tarim basin from Silurian to Permian,but also postdate the time of the hydrocarbon generation and expulsion of the Cambrian-Ordovician sources.The displacement of Altyn nappe-strike slip fault system since the Meozoic modifies the former Altyn collisional orogenic belt,which resulted in the formation of a series of Jurassic sedimentary basins within the Altyn Mountain and the southeastern part of the Tarim basin.Also,the important source and reservoir rocks were deposited in these basins.Transpression of the Altyn fault system easily generates the secondary structural traps near the two flank of fault,for example,both sides of the hidden Che'erchen faults,are especially propitious to such structural traps.Therefore,these locations are likely potential areas for petroleum exploration.The successful exploration of the Altyn slope zone in the west of the Qaidam basin located to the another side of the Altyn Mountain,may indicates that more attention should be paid to the possible oil-gas pools existing in the fan delta reservoir,and to the possibly remnant oil-gas pools near the oil-soaking sandstones outcropping in the surfaces.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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Cited By Count: 4
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