A skull and a series of associated cervical vertebrae （ZLJ0112） discovered from the Lower Lufeng Formation （Lower Jurassic） are determined as a juvenile specimen of Lufengosaurus huenei Young 1941 based on amended...A skull and a series of associated cervical vertebrae （ZLJ0112） discovered from the Lower Lufeng Formation （Lower Jurassic） are determined as a juvenile specimen of Lufengosaurus huenei Young 1941 based on amended autapomorphies. Differences between ZLJ0112 and the holotype （subadult specimen） are considered as ontogenetic characteristic changes of L. huenei. Since some of these differences are present in other prosauropod dinosaurs （i.e., forms of the maxillary vascular foramen are irregular; the frontal contribution to the dorsal margin of the orbit is substantial; the frontal contribution to the supratemporal fossa is absent; the supratemporal fenestra is visible in lateral view; the supraoccipital inclined at 75 degrees; the parasphenoid rostrum lies level with the occipital condyle; the retroarticular process is short; the axial postzygapophysis project caudally beyond the end of the centrum） they may be common ontogenetic changes in prosauropod dinosaurs.展开更多
This paper is concerned with the geochemical features of major elements, transitionmetal elements, large ion lithophile elements, rare-earth elements and Sr isotopes in alkaline-ul-trabasic rocks in the Jijie complex ...This paper is concerned with the geochemical features of major elements, transitionmetal elements, large ion lithophile elements, rare-earth elements and Sr isotopes in alkaline-ul-trabasic rocks in the Jijie complex of Lufeng, Yunnan Province, which is located in southernSichuan-Yunnan rift zone, one of Luoci alkaline-ultrabasic complexes in central Ynnnan.Moreover, its origin pertaining primary magma, magma soure region, fractional crystallization,etc. are also discussed in the present paper.展开更多
A new theropod dinosaur, Shidaisaurusjinae gen. et sp. nov., has been described on the basis of an incomplete skeleton. The specimen was found near the base of the Upper Lufeng Formation （early Middle Jurassic） in Y...A new theropod dinosaur, Shidaisaurusjinae gen. et sp. nov., has been described on the basis of an incomplete skeleton. The specimen was found near the base of the Upper Lufeng Formation （early Middle Jurassic） in Yunnan, China. It is the first theropod dinosaur from the Middle Jurassic of Yunnan. Shidaisaurus jinae is distinguishable from other Jurassic theropods by certain features from the braincase, axis, and pelvic girdle. The absence of any pleurocoels in the axis or in any anterior dorsal vertebrae suggests that the new Lufeng theropod is relatively primitive and more plesiomorphic than most of the Middle to Late Jurassic theropods from China. Most Chinese taxa of Jurassic theropod dinosaurs have not been well described; a further detailed study will be necessary for us to determine their phylogenetic relationships with Shidaisaurusjinae.展开更多
Based on the data on petrology and geochemisty for the Jijie alkaline-ultrabasic intrusive rock complex, this paper, by means of correlation, suggested that the average composition of melteigites with 10% olivine adde...Based on the data on petrology and geochemisty for the Jijie alkaline-ultrabasic intrusive rock complex, this paper, by means of correlation, suggested that the average composition of melteigites with 10% olivine added (Fo=86) can be considered as the composition of the primary magma of the Jijie complex. This magma, whose composition is estimated from the incompatible element P2O5, was produced by 3%±partial melting of pyrolites. The results of Petrological Mixing Calculating showed that the mantle-source rocks of the Jijie complex are obviously depleted in incompatible elements.展开更多
始鼠科（Eomyidae）是一类绝灭了的啮齿类动物，渐新世和中新世时广布全北区，但亚洲远没有欧洲和北美常见。中国含始鼠类化石地点不多，发现的属只有渐新世的Eomys、Eomyodon和Pseudotheridomys，以及中新世的Keramidomys和Leptodonto...始鼠科（Eomyidae）是一类绝灭了的啮齿类动物，渐新世和中新世时广布全北区，但亚洲远没有欧洲和北美常见。中国含始鼠类化石地点不多，发现的属只有渐新世的Eomys、Eomyodon和Pseudotheridomys，以及中新世的Keramidomys和Leptodontomys（Zheng and Li．1982；Falhbusch et al．，1983；Wang and Emry，1991；Qiu，1996；Wang，2002）。展开更多
文摘A skull and a series of associated cervical vertebrae （ZLJ0112） discovered from the Lower Lufeng Formation （Lower Jurassic） are determined as a juvenile specimen of Lufengosaurus huenei Young 1941 based on amended autapomorphies. Differences between ZLJ0112 and the holotype （subadult specimen） are considered as ontogenetic characteristic changes of L. huenei. Since some of these differences are present in other prosauropod dinosaurs （i.e., forms of the maxillary vascular foramen are irregular; the frontal contribution to the dorsal margin of the orbit is substantial; the frontal contribution to the supratemporal fossa is absent; the supratemporal fenestra is visible in lateral view; the supraoccipital inclined at 75 degrees; the parasphenoid rostrum lies level with the occipital condyle; the retroarticular process is short; the axial postzygapophysis project caudally beyond the end of the centrum） they may be common ontogenetic changes in prosauropod dinosaurs.
文摘This paper is concerned with the geochemical features of major elements, transitionmetal elements, large ion lithophile elements, rare-earth elements and Sr isotopes in alkaline-ul-trabasic rocks in the Jijie complex of Lufeng, Yunnan Province, which is located in southernSichuan-Yunnan rift zone, one of Luoci alkaline-ultrabasic complexes in central Ynnnan.Moreover, its origin pertaining primary magma, magma soure region, fractional crystallization,etc. are also discussed in the present paper.
基金supported by grants from the Canadian Museum of Nature and the National Science and Engineering Research Counsel of Canada (Grant No:203091-98).
文摘A new theropod dinosaur, Shidaisaurusjinae gen. et sp. nov., has been described on the basis of an incomplete skeleton. The specimen was found near the base of the Upper Lufeng Formation （early Middle Jurassic） in Yunnan, China. It is the first theropod dinosaur from the Middle Jurassic of Yunnan. Shidaisaurus jinae is distinguishable from other Jurassic theropods by certain features from the braincase, axis, and pelvic girdle. The absence of any pleurocoels in the axis or in any anterior dorsal vertebrae suggests that the new Lufeng theropod is relatively primitive and more plesiomorphic than most of the Middle to Late Jurassic theropods from China. Most Chinese taxa of Jurassic theropod dinosaurs have not been well described; a further detailed study will be necessary for us to determine their phylogenetic relationships with Shidaisaurusjinae.
文摘Based on the data on petrology and geochemisty for the Jijie alkaline-ultrabasic intrusive rock complex, this paper, by means of correlation, suggested that the average composition of melteigites with 10% olivine added (Fo=86) can be considered as the composition of the primary magma of the Jijie complex. This magma, whose composition is estimated from the incompatible element P2O5, was produced by 3%±partial melting of pyrolites. The results of Petrological Mixing Calculating showed that the mantle-source rocks of the Jijie complex are obviously depleted in incompatible elements.
文摘始鼠科（Eomyidae）是一类绝灭了的啮齿类动物，渐新世和中新世时广布全北区，但亚洲远没有欧洲和北美常见。中国含始鼠类化石地点不多，发现的属只有渐新世的Eomys、Eomyodon和Pseudotheridomys，以及中新世的Keramidomys和Leptodontomys（Zheng and Li．1982；Falhbusch et al．，1983；Wang and Emry，1991；Qiu，1996；Wang，2002）。
基金supported by the Chinese National Natural Science Foundation (41472025) the Strategic Priority Research Program of the Chinese Academy of Sciences(CAS,XDB03020501)~~
