Several therocephalian species,mainly represented by cranial material from the late Permian,have been reported from China in recent years.Here we describe a tiny new baurioid therocephalian,Jiucaiyuangnathus confusus ...Several therocephalian species,mainly represented by cranial material from the late Permian,have been reported from China in recent years.Here we describe a tiny new baurioid therocephalian,Jiucaiyuangnathus confusus gen.et sp.nov.,from the Jiucaiyuan Formation,Xinjiang,China.The new taxon is represented by a partial snout with occluded partial lower jaw and two postcranial skeletons.Although juvenile in stage,the new species is diagnosed by the following features:round pit in middle of lateral surface of maxilla;lacrimal contact nasal;fossa for dentary tooth on the posterior end of the premaxilla,lateral to the anterior choana;two small vertical triangular ridges extending dorsally and ventrally on the vomerine anterior portion,and bordering a thin vomerine foramen laterally;anterior projection of the lateral part of the frontal on the nasal;symphyseal region of the dentary projected anteriorly;5 upper premaxillary teeth,upper and lower canines absent,diastema between the last premaxillary upper incisor and first maxillary tooth present,no diastema separating anterior from posterior dentition in the mandible,10 maxillary teeth and 12 dentary teeth,posterior postcanine expands mesiodistally,having a main large cusps and tiny anterior and posterior accessory cusps in line;neural arches of the atlas fused by the neural spine,neural spine of the axis projected posteriorly,procoracoid foramen lies between procoracoid and scapula.Features of the dentition resembles those of the small baurioid Ericiolacerta parva from South Africa and Silphedosuchus orenburgensis from Russia.The specimens provide the rare opportunity to know in detail the postcranial skeleton of baurioids.展开更多
More than 200 upper and lower jaws of ochotonid were found in the Late Oligocene of thenorthern part of the Junggar Basin,Xinjiang Uygur Autonomous Region,in the summer of1982.Sinolagomys.a unique Paleogene lagomorph ...More than 200 upper and lower jaws of ochotonid were found in the Late Oligocene of thenorthern part of the Junggar Basin,Xinjiang Uygur Autonomous Region,in the summer of1982.Sinolagomys.a unique Paleogene lagomorph with rootless(?) cheek teeth,was erected byBohlin(1937)based on the collections from Shargaltien and Taben-buluk,Gansu province.Upto now,it has been recorded from Middle Oligocene to the Lower Miocene of Gansu,Ninxia,Nei Mongol,and Xinjiang of China,and the Mongolian People’s Republic.展开更多
The mastodont materials described in the present paper, associated with Amblycastor tunggurensis, Amphicyon sp., Anchitherium cf. aurelianense, Brachypotherium sp., ?Chilotherium sp., Stephanocemas thomsoni, Dicroceru...The mastodont materials described in the present paper, associated with Amblycastor tunggurensis, Amphicyon sp., Anchitherium cf. aurelianense, Brachypotherium sp., ?Chilotherium sp., Stephanocemas thomsoni, Dicrocerus grangeri, Eotragus sp., Oioceros grangeri and O. noverca, were collected from the Haramagai formation of Junggar Basin in Xinjiang by an IVPP field team in 1982. The geology of the area has already been reported by Tong (1986, 1987). The mastodont fossils found at 5 sites on the north and west banks of the Ulungur river, Junggar Basin are abundant. They comprise 5 species, among which is one new species.The author is greatly indebted to the IVPP field team (Tong, Y., the head of the 1982 Junggar field team) allocating the mastodont materials for me to study.展开更多
The paper focuses on geological and geochemical evidence of thermal brine genesis of Pb Zn deposits in Wuqia district, Xinjiang. The results suggest that the known Pb Zn deposits, such as Wulagen, are thermal brine ge...The paper focuses on geological and geochemical evidence of thermal brine genesis of Pb Zn deposits in Wuqia district, Xinjiang. The results suggest that the known Pb Zn deposits, such as Wulagen, are thermal brine genesis, which is supported by the features of tectonic setting, magma and regional metamorphism, and the characteristics of trace element distribution in strata and redistribution in the ore forming process, the REE patterns and their main parameters of main type ores, the composition features and the source indicators of Pb, S isotopes. Ore forming conditions of superlarge Pb Zn deposits studies show that there exists tectonic and sources setting of Jinding type superlarge Pb Zn deposits in this area. Five Pb Zn ore belts and central uplift belts discovered lately have not only confirmed that the genesis of Wulagen Pb Zn deposits is thermal genesis, but also further proved that there exists tectonic and source setting of Jinding type superlarge Pb Zn deposit in the study area. Mineral deposit model was described and prospecting potentiality of superlarge Pb Zn deposit and their significance were discussed.展开更多
Since the first report on Chinese lystrosaurs made by Yuan and Young in 1934, abundant material has been collected from the Early Triassic of Jiuchaiyuan Formation of Jimusar (Fuyuan), Junggar basin and Taoshuyuan, Tu...Since the first report on Chinese lystrosaurs made by Yuan and Young in 1934, abundant material has been collected from the Early Triassic of Jiuchaiyuan Formation of Jimusar (Fuyuan), Junggar basin and Taoshuyuan, Turpan basin. Up to now 7 species of Lystrosaurus——L. broomi, L. hedini, L. weidcnreichi, L. youngi, L. robustus, L. latifrons and L. shichanggouensis, have been erected in China. All the species were described based on almost complete skulls, except L. weidenreichi, which was on some materials of postcranial skeleton. It was thought generally that L. broomi and L. youngi are closely related to the South African L. murrayi and L. curvatus respectively. Furthermore, the two Chinese species were considered as synonymous with their counterparts of South Africa by Colbert in 1974, when he revised this genus. The characters of the Chinese lystrosaurs, however, appeared to give no support to Colbert’s suggestion. A comprehensive study of the Chinese lystrosaurs based on the type specimens and the additional materials, and the revised diagnoses. for 4 species are given in the present paper.展开更多
The Tarim Basin corresponds to a large sedimentary depression which separates (Yang et al.,1996)the Tianshan belt to the North from the Kunlun—Pamir belt to the South (Fig.1A).Its western part can be divided into the...The Tarim Basin corresponds to a large sedimentary depression which separates (Yang et al.,1996)the Tianshan belt to the North from the Kunlun—Pamir belt to the South (Fig.1A).Its western part can be divided into the following structural units,from North to South (Fig.1B):①Foreland belts of Southern Tianshan.which involve Palaeozoic and Cenozoic sediments overlapping southward the Quaternary infilling of the basin (Dong Jia et al.,1998);②Bachu NW\|SE oriented Uplift of Central Tarim. where NE dipping reverse faults crossing Palaeozoic and Cenozoic series can be found (Hendrix et al.,1992);③SW depression of Tarim Basin. filled up with thick (up to 15000m),weakly deformed,post hercynian sediments;④Foreland belts of West Kunlun\|Pamir. made up of Precambrian,Palaeozoic,Mesozoic and Cenozoic materials overlapping northeastward the preceding unit(Qu et al.,1996).展开更多
The Baishiquan and Pobei Early Permian mafic-ultramafic intrusions were emplaced into Proterozoic metamorphic rocks in the Central Tianshan and the Beishan Fold Belt,northern Xinjiang,NW China.The Baishiquan intrusion...The Baishiquan and Pobei Early Permian mafic-ultramafic intrusions were emplaced into Proterozoic metamorphic rocks in the Central Tianshan and the Beishan Fold Belt,northern Xinjiang,NW China.The Baishiquan intrusion comprises mainly gabbro,and mela-gabbro sills occur within and along the margins of the gabbro body.In the Pobei intrusion,two distinct gabbroic packages,a lower gabbro and the main gabbro,are intruded and overlain by small cumulate wehrlite bodies.展开更多
文摘Several therocephalian species,mainly represented by cranial material from the late Permian,have been reported from China in recent years.Here we describe a tiny new baurioid therocephalian,Jiucaiyuangnathus confusus gen.et sp.nov.,from the Jiucaiyuan Formation,Xinjiang,China.The new taxon is represented by a partial snout with occluded partial lower jaw and two postcranial skeletons.Although juvenile in stage,the new species is diagnosed by the following features:round pit in middle of lateral surface of maxilla;lacrimal contact nasal;fossa for dentary tooth on the posterior end of the premaxilla,lateral to the anterior choana;two small vertical triangular ridges extending dorsally and ventrally on the vomerine anterior portion,and bordering a thin vomerine foramen laterally;anterior projection of the lateral part of the frontal on the nasal;symphyseal region of the dentary projected anteriorly;5 upper premaxillary teeth,upper and lower canines absent,diastema between the last premaxillary upper incisor and first maxillary tooth present,no diastema separating anterior from posterior dentition in the mandible,10 maxillary teeth and 12 dentary teeth,posterior postcanine expands mesiodistally,having a main large cusps and tiny anterior and posterior accessory cusps in line;neural arches of the atlas fused by the neural spine,neural spine of the axis projected posteriorly,procoracoid foramen lies between procoracoid and scapula.Features of the dentition resembles those of the small baurioid Ericiolacerta parva from South Africa and Silphedosuchus orenburgensis from Russia.The specimens provide the rare opportunity to know in detail the postcranial skeleton of baurioids.
文摘More than 200 upper and lower jaws of ochotonid were found in the Late Oligocene of thenorthern part of the Junggar Basin,Xinjiang Uygur Autonomous Region,in the summer of1982.Sinolagomys.a unique Paleogene lagomorph with rootless(?) cheek teeth,was erected byBohlin(1937)based on the collections from Shargaltien and Taben-buluk,Gansu province.Upto now,it has been recorded from Middle Oligocene to the Lower Miocene of Gansu,Ninxia,Nei Mongol,and Xinjiang of China,and the Mongolian People’s Republic.
文摘The mastodont materials described in the present paper, associated with Amblycastor tunggurensis, Amphicyon sp., Anchitherium cf. aurelianense, Brachypotherium sp., ?Chilotherium sp., Stephanocemas thomsoni, Dicrocerus grangeri, Eotragus sp., Oioceros grangeri and O. noverca, were collected from the Haramagai formation of Junggar Basin in Xinjiang by an IVPP field team in 1982. The geology of the area has already been reported by Tong (1986, 1987). The mastodont fossils found at 5 sites on the north and west banks of the Ulungur river, Junggar Basin are abundant. They comprise 5 species, among which is one new species.The author is greatly indebted to the IVPP field team (Tong, Y., the head of the 1982 Junggar field team) allocating the mastodont materials for me to study.
基金TheNationalNaturalScienceFoundationofChina (No .4 0 0 72 0 32 )
文摘The paper focuses on geological and geochemical evidence of thermal brine genesis of Pb Zn deposits in Wuqia district, Xinjiang. The results suggest that the known Pb Zn deposits, such as Wulagen, are thermal brine genesis, which is supported by the features of tectonic setting, magma and regional metamorphism, and the characteristics of trace element distribution in strata and redistribution in the ore forming process, the REE patterns and their main parameters of main type ores, the composition features and the source indicators of Pb, S isotopes. Ore forming conditions of superlarge Pb Zn deposits studies show that there exists tectonic and sources setting of Jinding type superlarge Pb Zn deposits in this area. Five Pb Zn ore belts and central uplift belts discovered lately have not only confirmed that the genesis of Wulagen Pb Zn deposits is thermal genesis, but also further proved that there exists tectonic and source setting of Jinding type superlarge Pb Zn deposit in the study area. Mineral deposit model was described and prospecting potentiality of superlarge Pb Zn deposit and their significance were discussed.
文摘Since the first report on Chinese lystrosaurs made by Yuan and Young in 1934, abundant material has been collected from the Early Triassic of Jiuchaiyuan Formation of Jimusar (Fuyuan), Junggar basin and Taoshuyuan, Turpan basin. Up to now 7 species of Lystrosaurus——L. broomi, L. hedini, L. weidcnreichi, L. youngi, L. robustus, L. latifrons and L. shichanggouensis, have been erected in China. All the species were described based on almost complete skulls, except L. weidenreichi, which was on some materials of postcranial skeleton. It was thought generally that L. broomi and L. youngi are closely related to the South African L. murrayi and L. curvatus respectively. Furthermore, the two Chinese species were considered as synonymous with their counterparts of South Africa by Colbert in 1974, when he revised this genus. The characters of the Chinese lystrosaurs, however, appeared to give no support to Colbert’s suggestion. A comprehensive study of the Chinese lystrosaurs based on the type specimens and the additional materials, and the revised diagnoses. for 4 species are given in the present paper.
基金theNationalNaturalScienceFoundationofChina (No ..4982 5 10 2 )
文摘The Tarim Basin corresponds to a large sedimentary depression which separates (Yang et al.,1996)the Tianshan belt to the North from the Kunlun—Pamir belt to the South (Fig.1A).Its western part can be divided into the following structural units,from North to South (Fig.1B):①Foreland belts of Southern Tianshan.which involve Palaeozoic and Cenozoic sediments overlapping southward the Quaternary infilling of the basin (Dong Jia et al.,1998);②Bachu NW\|SE oriented Uplift of Central Tarim. where NE dipping reverse faults crossing Palaeozoic and Cenozoic series can be found (Hendrix et al.,1992);③SW depression of Tarim Basin. filled up with thick (up to 15000m),weakly deformed,post hercynian sediments;④Foreland belts of West Kunlun\|Pamir. made up of Precambrian,Palaeozoic,Mesozoic and Cenozoic materials overlapping northeastward the preceding unit(Qu et al.,1996).
文摘The Baishiquan and Pobei Early Permian mafic-ultramafic intrusions were emplaced into Proterozoic metamorphic rocks in the Central Tianshan and the Beishan Fold Belt,northern Xinjiang,NW China.The Baishiquan intrusion comprises mainly gabbro,and mela-gabbro sills occur within and along the margins of the gabbro body.In the Pobei intrusion,two distinct gabbroic packages,a lower gabbro and the main gabbro,are intruded and overlain by small cumulate wehrlite bodies.
