Tectonic movements formed several unconfor- mities in the north-west margin of the Junggar basin. Based on data of outcrop, core, and samples, the unconformity is a structural body whose formation associates with weat...Tectonic movements formed several unconfor- mities in the north-west margin of the Junggar basin. Based on data of outcrop, core, and samples, the unconformity is a structural body whose formation associates with weath- ering, leaching, and onlap. At the same time, the structural body may be divided into three layers, including upper layer, mid layer, and lower layer. The upper layer with good primary porosity serves as the hydrocarbon migration system, and also accumulates the hydrocarbon. The mid layer with compactness and ductility can play a role as cap rock, the strength of which increases with depth. The lower layer with good secondary porosity due to weathering and leaching can form the stratigraphic truncation traps. A typical stratigraphie reservoir lying in the unconformity between the Jurassic and Triassic in the north-west margin of the Junggar basin was meticulously analyzed in order to reveal the key controlling factors. The results showed that the hydrocarbon distribution in the stratigraphic onlap reservoirs was controlled by the onlap line, the hydro- carbon distribution in the stratigraphic truncation reser- voirs was confined by the truncation line, and the mid layer acted as the key sealing rock. So a conclusion was drawn that ＂two lines （onlap line and truncation line） and a body （unconformity structural body）＂ control the formation and distribution of stratigraphic reservoirs.展开更多
Stratigraphic sections of 4 Tertian rock units in the Ulungur River region, northern rim of the Junggur Basin, Xinjiang, are briefly described. These are the Kekemaideng, Halamagai, Suosuoquan and Ulunguhe formations....Stratigraphic sections of 4 Tertian rock units in the Ulungur River region, northern rim of the Junggur Basin, Xinjiang, are briefly described. These are the Kekemaideng, Halamagai, Suosuoquan and Ulunguhe formations. The contact relationships and biochronology of these rock units are discussed. The Kekemaideng beds are considered to be a formation of probably equivalent to middle Miocene Tunggur Fm. in age. The farm from the Halamagai Fm. is correlative to early coddle Miocene Tongxin fauna. The lower part of the Suosuoquan Fm. is younger than Tabenbulukian and probably of earliest Miocene. The Uunguhe Fm. in itS current usage is a mixture of sediments with different lithologies and different ages ranging from Cretaceous to Oligocene and should therefore be redefined.展开更多
Paraceraterium sui sp.nov. is represented by a lower jaw collected at Loc.20004 (46°35.779′N , 87°43.818′E) of Saerduoyila, Halamagai Village, Fuhai County, Xinjiang Uygur Autonomous Region. The new specie...Paraceraterium sui sp.nov. is represented by a lower jaw collected at Loc.20004 (46°35.779′N , 87°43.818′E) of Saerduoyila, Halamagai Village, Fuhai County, Xinjiang Uygur Autonomous Region. The new species is similar to the type species of the genus, P. bugtiense , in general morphology of the mandible and teeth, but differs from the latter in larger size, the proportionally deeper horizontal ramus, the more anteroventrally curved symphysis and the much deeper trenched dorsal surface of symphysis. The associated small mammals indicates an age of Late Oligocene. The occurrence of Para ceratherium sui demonstrates that the genus Paraceratherium erected by Forster Cooper, based on the lower jaw from Pakistan, is a valid taxon different from Indricotherium .展开更多
Two petrosals from the Late Oligocene of the northern Junggar Basin, Xinjiang Uygur Autonomous Region of China are described and are assigned to ?Yindirtemys and ?Sinolagomys or Desmatolagus based on sizes and morphol...Two petrosals from the Late Oligocene of the northern Junggar Basin, Xinjiang Uygur Autonomous Region of China are described and are assigned to ?Yindirtemys and ?Sinolagomys or Desmatolagus based on sizes and morphologies. The unit formed by a fused bulla and petrosal, the spongy bullar wall and the anterior position of the entrance for the stapedial artery into the tympanic cavity indicate that petrosal A is most likely from an ochotonid. Absence of grooves and formina for the internal carotid artery around the promontorium suggests petrosal B probably belongs to the ctenodactylid Yindirtemys. If the identifications are confirmed, these specimens represent the first records of ear regions in the two taxa.展开更多
文摘Tectonic movements formed several unconfor- mities in the north-west margin of the Junggar basin. Based on data of outcrop, core, and samples, the unconformity is a structural body whose formation associates with weath- ering, leaching, and onlap. At the same time, the structural body may be divided into three layers, including upper layer, mid layer, and lower layer. The upper layer with good primary porosity serves as the hydrocarbon migration system, and also accumulates the hydrocarbon. The mid layer with compactness and ductility can play a role as cap rock, the strength of which increases with depth. The lower layer with good secondary porosity due to weathering and leaching can form the stratigraphic truncation traps. A typical stratigraphie reservoir lying in the unconformity between the Jurassic and Triassic in the north-west margin of the Junggar basin was meticulously analyzed in order to reveal the key controlling factors. The results showed that the hydrocarbon distribution in the stratigraphic onlap reservoirs was controlled by the onlap line, the hydro- carbon distribution in the stratigraphic truncation reser- voirs was confined by the truncation line, and the mid layer acted as the key sealing rock. So a conclusion was drawn that ＂two lines （onlap line and truncation line） and a body （unconformity structural body）＂ control the formation and distribution of stratigraphic reservoirs.
文摘Stratigraphic sections of 4 Tertian rock units in the Ulungur River region, northern rim of the Junggur Basin, Xinjiang, are briefly described. These are the Kekemaideng, Halamagai, Suosuoquan and Ulunguhe formations. The contact relationships and biochronology of these rock units are discussed. The Kekemaideng beds are considered to be a formation of probably equivalent to middle Miocene Tunggur Fm. in age. The farm from the Halamagai Fm. is correlative to early coddle Miocene Tongxin fauna. The lower part of the Suosuoquan Fm. is younger than Tabenbulukian and probably of earliest Miocene. The Uunguhe Fm. in itS current usage is a mixture of sediments with different lithologies and different ages ranging from Cretaceous to Oligocene and should therefore be redefined.
基金supported by grants from the Knowledge Innovation Program of the Chinese Academy of Sciences(KZCX2-YW-120)the Chinese National Natural Science Foundation(40472022)~~
文摘Paraceraterium sui sp.nov. is represented by a lower jaw collected at Loc.20004 (46°35.779′N , 87°43.818′E) of Saerduoyila, Halamagai Village, Fuhai County, Xinjiang Uygur Autonomous Region. The new species is similar to the type species of the genus, P. bugtiense , in general morphology of the mandible and teeth, but differs from the latter in larger size, the proportionally deeper horizontal ramus, the more anteroventrally curved symphysis and the much deeper trenched dorsal surface of symphysis. The associated small mammals indicates an age of Late Oligocene. The occurrence of Para ceratherium sui demonstrates that the genus Paraceratherium erected by Forster Cooper, based on the lower jaw from Pakistan, is a valid taxon different from Indricotherium .
文摘Two petrosals from the Late Oligocene of the northern Junggar Basin, Xinjiang Uygur Autonomous Region of China are described and are assigned to ?Yindirtemys and ?Sinolagomys or Desmatolagus based on sizes and morphologies. The unit formed by a fused bulla and petrosal, the spongy bullar wall and the anterior position of the entrance for the stapedial artery into the tympanic cavity indicate that petrosal A is most likely from an ochotonid. Absence of grooves and formina for the internal carotid artery around the promontorium suggests petrosal B probably belongs to the ctenodactylid Yindirtemys. If the identifications are confirmed, these specimens represent the first records of ear regions in the two taxa.
