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地学前缘 2000年第S1期7卷 119-119页

作者： Matsuoka Atsushi\+1,Kobayashi Kenta\+1, Takei Masahiko\+1,Nagahashi Toru\+1, Yang Qun\+2,Wang Yujing\+2,Zeng Qinggao\+3(1 Department of geology, Niigata University, Niigata, Japan 2 nanjing institute of geology and palaeontology, academia sinica, nan

The Ceno\|Tethys is a southern branch of the Tethyan ocean and existed in the Mesozoic and early Cenozoic times. The evolution of the Ceno\|Tethys has been discussed based mainly on geological and paleontological data obtained from shallow marine sediments on the both sides of the ocean. Pelagic sediments deposited in a deep ocean basin of the Ceno\|Tethys are often incorporated in suture zones. However, geological and paleontological data from the pelagic sediments, which enable us to elucidate the paleoceanography and tectonic evolution of the Ceno\|Tethys, are still limited. The Xialu chert crops out about 30 km south of Xigaze and occupies the southern marginal part of the E—W trending Yarlung Zangbo Suture zone. As a result of radiolarian biostratigraphic research along two continuous sections, we identified seven different aged radiolarian assemblages from pelagic and hemipelagic sediments ranging early Middle Jurassic (Aalenian) to Early Cretaceous. The Aalenian radiolarian fauna is the oldest known record so far for the Xialu chert. It is noteworthy to point out that the fauna came from a chert sample which contains no terrigenous elements other than clay minerals. There is a possibility that radiolarian faunas older than Aalenian age will be discovered from the Xialu chert in the future.

关键词： Ceno\|Tethys Yarlung Zangbo Suture Zone Southern Tibet Radi olaria Conodont Triassic Jurassic Cretaceous

A Comprehensive Evaluation on the Devonian-Carboniferous Boundary Stratotype Candidate Section in nanbiancun, Guilin, Guangxi

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Acta Geologica sinica(English Edition) 1990年第1期64卷 69-79页

作者： Yu Changmin nanjing institute of geology and palaeontology, academia sinica 2This paper is extracted from some relevant chapters of a monograph. The authors who wrote the monograph are: Yu Changmin Ruan Yiping Xu Hankui Wang Shangqi Zhu Zhaoling Mu Xinan Wang Keliang Yin Bao' an Li Zhengliang Li Yukuan Guo Shuying Yao Zhaogui He Guiying Zhang Yue'e Lu Hongjin Huang Zhicheng Zhu Sizhao Yang Jiedong Wang Yinxi Ye Sujuan and Xu Tongchun.

This paper presents a comprehensive evaluation on the Devonian-Carboniferous Boundary (DCB) sectionin nanbiancun. Guilin. Guangxi on the basis of Palaeontological, biostratigraphical and sedimentarypetrological studies as well as microfacies analysis. REE and trace element analysis and isotopic dating. The DCB at this section conforms to the definition of this boundary and essentially measure up the criteriaand conditions for selection of the boundary stratotype. Up to 14 fossil groups are contained in the section. Thesection presents a general biostratigraphical framework with multispecies fossils zones, assemblage zones andmultiple groups of fossils and has latent preponderant conditions for magnetostratigraphic andchronostratigraphic studies. The boundary and point occur in a persistent and continuous monofacialcarbonate succession. and the section is located in a tourist city with convenient communication, where variousfacies of DCB sections are developed. allowing the correlation within a small area. So it is an ideal candidateboundary stratotype.

关键词： Guilin Guangxi A Comprehensive Evaluation on the Devonian-Carboniferous Boundary Stratotype Candidate Section in nanbiancun

A Different Opinion on the Geological Age of the Longzhaogou and Jixi Groups of Eastern Heilongjiang, China

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Acta Geologica sinica(English Edition) 1992年第2期66卷 209-218,223页

作者： Sha Jingeng nanjing institute of geology and palaeontology, academia sinica, nanjing, Jiangsu nanjing institute of geology and palaeontology Academia Sinica Nanjing Jiangsu

The age of the Longzhaogou and Jixi Groups of coal measures in eastern Heilongjiang were previouslyconsidered to be Jurassic or mainly Jurassic. But there occur Middle Barremian-Early Albian Aucellina(bivalvia) fossils in the Upper Yunshan Formation of the Longzhaogou Group and the Lower Chengzihe For-mation of the Jixi Group, and the Qihulin Formation of the Longzhaogou Group yields Early Cretaceousbivalve and ammonite fossils. Consequently, the geological ages of the two groups are mainly, or even all, Ear-ly Cretaceous.

关键词： A Different Opinion on the Geological Age of the Longzhaogou and Jixi Groups of Eastern Heilongjiang China

TWO CALLIXYLON SPECIES FROM UPPER DEVONIAN OF JUNGGAR BASIN, XINJIANG

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古生物学报 1989年第5期 575-578页

作者： Cai Chong-yang (nanjing institute of geology and palaeontology, academia sinica)

During field studies of the Devonian biostratigraphy in the summers of 1984 and 1985, some silicified woods of Callixylon were discovered for the first time by the author from the Hongguleleng Formation (Late Devonian) in the northwestern border area of the Junggar (Dzungaria) Basin, Xinjiang (Sinkiang), which have been briefly reported (Cai, 1987). Here illustrated and described are two species, from our collection, namely, Callixylon of. clevelandensis Chitaley and Callixylon newberryi (Dawson) Elkins et Wieland. DESCRIPTION OF SPECIES Callixylon cf. clevelandensis Chitaley (P1. Ⅰ, figs. 1—5; Pl. Ⅱ, figs. 1, 2)

关键词： briefly Dawson border collection illustrated 登记号 XINJIANG 弦切面 northwestern 局部放大

SOME LOWER CRETACEOUS GYMNOSPERMAE FROM ZHEJIANG WITH STUDY ON THEIR CUTICULES

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古生物学报 1989年第4期 440-446页

作者： Cao Zheng-yao (nanjing institute of geology and palaeontology, academia sinica)

The Lower Cretaceous extensively distributed in Zhejiang contains abundant fossil plants. Since most of the fossils are so fragmentary, it is difficult to make a definite determination at specific level. The cuticle remains are very rare; only two species were reported (Chow and Tsao, 1979), namely, Pseudofrenelopsis parceramosa (Font.) Watson and P. papillosa (Chow et Tsao). This paper deals with several specimens of Gymnospermae, paying particular attention to the characteristics of the cuticular structure. These specimens belong to Nilssonia, Pseudofrenelopsis, Cupressinocladus and Brachyphyllum respectively, all being yielded from the four localities: 1. Suqin of Gymnospermae, paying particular attention to the characteristics of the cuticular structure. These specimens belong to Nihsonia, Pseudafrenelopsis, Cupressi-nocladus and Brachyphyllum respectively, all being yielded from the four localities: 1. Suqin of Xinchang County (Guantou Formation); 2. Shen-jia of Zhuji County (Shouchang Formation); 3. Pingshan of Lin’an County (Shouchang Formation); and 4. Laocun of Jiande County (Laocure Formation), as shown in the map of fossil localities in this paper. The subdivision of Lower Cretaceous and its correlation in both western and eastern Zhejiang are tabulated as follows (in descending order):

关键词：下表皮内面副卫细胞角质增厚 view 气孔器 SOME LOWER CRETACEOUS GYMNOSPERMAE FROM ZHEJIANG WITH STUDY ON THEIR CUTICULES 表皮构造表面构造

DISCOVERY OF LATE CRETACEOUS PALYNOFLORA FROM FILDES PENINSULA, KING GEORGE ISLAND, ANTARCTICA AND ITS SIGNIFICANCE

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古生物学报 1990年第2期29卷 143-145,258页

作者： Cao Liu(nanjing institute of geology and palaeontology, academia sinica)

This paper makes an analysis and study on altogether 8 palyniferous samples from the volcano-sedimentary rock series in the Half Three Point area of the Fildes Peninsula, King George Island, Antarctica, the rock series being grey tuffaceous siltstone in lithological characters, about 5m in thickness. Only after making a number of analyses, could we find the relatively abundant sporopollen fossils from 4 samples (Nos. GWP 4—7). But the fossils are poorly preserved, and most of them can hardly be identifi...

关键词： sedimentary rock abundant volcanic assemblage genera strata hardly Tertiary Cretaceous

DISCOVERY OF MONOGRAPTIDS IN BASAL PART OF LOWER SILURIAN FROM S. ANHUI WITH SPECIAL REFERENCE TO THEIR ORIGIN

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古生物学报 1990年第2期29卷 211-215,269页

作者： Li Ji-jin(nanjing institute of geology and palaeontology, academia sinica)

For a long time, the evolutionary series of a idoraptids-dimorphograptids-monograptids has been generally recognized by graptolite researchers. In the past years, the akidograptids were found to appear in the Lower Silurian Parakidograptus acuminatus Zone, while the dimorphograptids in the P. acuminatus and Orthograpius vesiculosus Zones, but the monograptids appeared as late as in the O. vesiculosus zone; this evolutionary series can be easily accepted by other people. Chen Xu and Lin Yao-kun (1978) pu...

关键词： evolutionary earliest Anhui theca probably basal genera Silurian portion locality

On Late Triassic Floras in China and Principles for Palaeophytogeographic Regionalization

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Acta Geologica sinica(English Edition) 1987年第1期61卷 1-10页

作者： Sun Ge nanjing institute of geology and palaeontology, academia sinica, nanjing nanjing institute of geology and palaeontology Academia Sinica Nanjing

A new scheme of Late Triassic palaeophytogeographic regionalization of China is put forward on the basis of three principles given as follows:1. The palaeophytogeographic regionalization should be based on the characters of the various floras themselves. These characters include the types of the dominant floras, compositional patterns of various communities and existence of dominant genera or those genera and species characteristic of a region.2. The palaeogeographic positions of the floras in geologic time should be considered.3. The distribution of the floras was influenced in three directions——latitudinal, longitudinal and vertical——in geological ***, a number of Chinese palaeobotanists based the palaeophytogeographic regionalization only on the factor of latitude, and neglected the characters of the floras themselves and the effect of their three-directional zonation. However the discovery of the Tianqiaoling flora(located at latitude 43.5°N in NE China) rich in fossils of Dipteridaceae and Cycadophyta, indicating tropic or subtropic conditions, and a comprehensive consideration of assigning the floras of southern Tibet on the basis of palaeomagnetism, plate tectonics, etc., suggest that the palaeophytogeographic regionalization is a rather complicated subject. As the climatic conditions controlling the growth of vegetation changed in three directions one should consider not only the effect of latitudinal change(which usually causes temperature variations from south to north), but also the effect of longitudinal change(which usually brings about variations in humidity from sea to inland) and moreover the effect of vertical or elevation change(which also leads to variations in temperature and humidity). At the same time, it is also necessary to take into consideration the actual palaeogeographic positions of the floras in geologic ***, it is suggested that the Late Triassic floras in China should be grouped into three floristic regions, namel

关键词： Triassic geologic latitude directions compositional positions climatic longitudinal floral inland

NAMURIAN FLORA FROM SOUTHWESTERN MARGIN OF TARIM BASIN

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古生物学报 1991年第6期 671-677+791-792页

作者： Yao Zhao-qi (nanjing institute of geology and palaeontology, academia sinica, nanjing 210008)

No Namurian plants from the Tarim basin in southern Xinjiang have been described so far, though scarce records of the Carboniferous plants were occasionally cited in some geologic literature. Owing to the lack of desc... 详细信息

关键词： Tarim basin Namurian flora Euramerican floral province Angara floral province

BIOGEOGRAPHIC RELATIONS OF THE JURASSIC PECTINOIDA AND OSTREOIDA (BIVALVIA) BETWEEN TANGGULA AND OTHER AREAS

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地学前缘 2000年第S1期7卷 139-141页

作者： Sha Jingeng (nanjing institute of geology and palaeontology, academia sinica, nanjing 210008, China)

There are abundant Bajocian—Tithonian bivalves in the main ridge of the Tanggula Mountains of northern Qinghai—Xizang Plateau, China. After figuring the common and coeval species between Tanggula and other areas (Fig. 1), and tracing the temporal and spacial historical distribution of the bivalves very capable of dispersion, some Jurassic bivalve biogeographic items, particularly the biogeographic relations, have been lit up. In the known 21 taxa of the Jurassic Pectinoida and Ostreoida from the main ridge of the Tanggula Mountains, there are 12 (57%) common and coeval species in northern Tethys, 13 (62%) common and coeval species in southern Tethys and 12 (57%) in Kachchh—southern Xizang area. It has demonstrated that there existed intermigration of bivalves between Tanggula and various parts of Tethys. Although there is no coeval species between Tanggula and western Australia, in these two areas there exist 6 (29%) close range common species of which 4 (19%) coevaity existed in western Australia and India Plate. Tanggula fauna is, therefore, still very close to that of western Australia. However, there are 15 (71%) common and 14 (67%) coevality species between the main ridge of the Tanggula Mountains and northwestern Europe, among the common species, 8 (38%) ones have lower limitation (first occurrence) in northwestern Europe but only 2 (10%) taxa are older in the main ridge of the Tanggula Mountains. It is very clear that pectinite and ostrea fauna of Tethys, particularly the main ridge of the Tanggula Mountains and Europe had very close relation and most Tanggula’s or northern Tethyan taxa migrated from northwestern Europe.

关键词： biogeographic relation Jurassic Bivalvia Tanggula of norther n Qinghai—Xizang plateau Tethys northwestern Eu rope Pacific