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| 1 | New records of Jurassic petrified wood in Jianchang of western Liaoning,China and their palaeoclimate implications显示文摘Diverse and rich fossil wood records have been documented from the Mesozoic of Liaoning Province, NE China. The Tiaojishan Formation(mainly distributed in Beipiao, Chaoyang, Fuxin and Jianchang regions) is one of the most significant horizons for the Jurassic petrified wood in Liaoning Province. Previously, wood fossils of this formation were mainly reported in Beipiao and Chaoyang regions, whereas fossil wood record was merely known in Jianchang region. Here we describe new fossil wood specimens from the Tiaojishan Formation in Jianchang County, western Liaoning. Two fossil wood taxa, i.e., Protaxodioxylon jianchangense Tian et Wang sp. nov. and Xenoxylon peidense Zheng et Zhang were recognized on the basis of anatomical features. These fossil wood records add new data for understanding the fossil wood diversity, floral composition and palaeoclimate of the Tiaojishan Formation. The occurrence of Xenoxylon and Protaxodioxylon implies a cool temperate, wet and seasonal climate condition with interannual variations during the Middle to Late Jurassic transition in western Liaoning region. | TIAN Ning XIE AoWei WANG YongDong JIANG ZiKun LI LiQin YIN YaLei ZHU ZhiPeng WANG JiaJia | 2015 | Science China Earth Sciences2015，58，12： | 10 |
| 2 | A new structurally preserved fern rhizome of Osmundaceae(Filicales) Ashicaulis wangii sp.nov.from the Jurassic of western Liaoning and its significances for palaeobiogeography and evolution显示文摘Permineralized osmundaceous rhizome with anatomical and phylogenetic information plays a significant role in understanding the origin,evolution,and diversity variation of the fern family Osmundaceae in geological history.The northern Hebei and western Liaoning region is one of the most important fossil localities for the Jurassic osmundaceous rhizome fossils in the Northern Hemisphere;however,the diversity character of osmundaceous rhizome fossil remains poorly known.A new structurally preserved fern rhizome species,Ashicaulis wangii sp.nov.,is described from the Middle Jurassic Tiaojishan Formation in Beipiao City,Liaoning Province,northeastern China.The rhizome is composed of heterogeneous pith,an ectophloic–dictyoxylic siphonostele,a two–layered cortex,and a mantle of adventitious roots and petiole bases.The xylem cylinder,with complete leaf gaps,consists of 15–17 xylem strands.The petiole base is characterized by a heterogeneous sclerotic ring and numerous sclerenchyma masses in the petiolar cortex.Among five known Ashicaulis species with heterogeneous sclerotic ring,four of them are documented from China.Therefore,osmundaceous rhizome fossils from China show endemic anatomical characteristics and significances for palaeobiogeography.Comparisons of anatomical features suggest that A.wangii sp.nov.bears close similarities to Osmunda pluma Miller from the Paleocene of Dakota,USA.Fossil species of A.wangii provides new evidence for further understanding the species diversity of osmundaceous rhizome fossil in China and in the Northern Hemisphere,and contributes to exploring the macroevolution process of the Mesozoic osmundaceous plants. | TIAN Ning WANG YongDong ZHANG Wu JIANG ZiKun | 2014 | Science China Earth Sciences2014，57，4： | 8 |
| 3 | Lipids of sulfate-reducing bacteria and sulfur-oxidizing bacteria found in the Dongsheng uranium deposit显示文摘U-bearing sandstones from the Dongsheng deposit in Ordos Basin contain abundant C15-C18 fatty acids. The fatty acids may have been derived from modern and ancient organisms including organisms from the intervals of U mineralization. A certain amount of i15:0, a15:0, a17:0 fatty acids coexist with small amounts of i17:1ω7c and 10me16:0, characteristic biomarkers of Desulfovibrio and Desulfobacter sp., respectively. This indicates the existence of sulfate-reducing bacteria (SRB) in the sandstones. The presence of sulfur-oxidizing bacteria (SOB), such as Beggiatoa and Thioploca, is indicated by significant amounts of 16:1ω7c and 18:1ω7c fatty acids. The existence of the SRB in the deposit, as inferred from the fatty acids, is consistent with results from fossilized microorganisms and isotopic compositions of ore-stage pyrite. This suggests that the environment may have been favorable for the SRB to grow since ore formation (9.8-22 Ma). The bacteria may have degraded hydrocarbons directly, or indirectly utilized hydrocarbons degraded by oxic microbes in the deposits. This process may have produced 12C-rich calcite and prominent baseline humps of unresolved complex mixtures (UCM), and 25-demethylated hopanes and tricyclic terpanes. The existence of sulfur-oxidizing bacteria and sulfate-reducing bacteria in the deposit may have resulted in bacterial sulfate reduction to sulfide, re-oxidization of the sulfide to sulfate and subsequent reduction of the sulfate to sulfide. This assertion is supported by ore-stage pyrite with δ34S values as low as-39.2‰, and the lightest sulfate (about 11‰) measured during the Phanerozoic, a difference of more than 46‰. | JIANG Lei CAI ChunFang ZHANG YongDong MAO ShengYi SUN YongGet LI KaiKai XIANG Lei ZHANG ChunMing | 2012 | Chinese Science Bulletin2012，57，11： | 6 |
| 4 | The occurrence and significance of C_(25)HBI in Cenozoic saline lacustrine source rocks from the Western Qaidam Basin,NW China显示文摘The saline lacustrine deposit of the Oligocene Lower Ganchaigou Formation is the main source rock for the Western Qaidam Basin,NW China.In this study,abundant highly branched isoprenoids with 25 carbon atoms (C25HBI) were detected in the upper section of the Lower Ganchaigou Formation.C25HBI is a biomarker for diatoms,and can provide information regarding biogeochemical processes during production and preservation of sedimentary organic matter.The carbon isotopic values of C25HBI in these source rocks were in the range of-18‰ to-20‰.The relative enrichment in 13C of C25HBI suggests that these isoprenoids were derived from diatom blooms.In this case,the diatoms used HCO3-as an additional carbon source to dissolved CO2 in water column due to their high biological productivity.Conversely,the diatom blooms indicated an abundant nutrient supply to the environment and high primary productivity.Thus,the occurrence of 13C-enriched C25HBI could be an ideal marker for good source rocks.The decreased concentration of CO2(aq) in the water column induced by diatom blooms can result in an enrichment in 13C of organic matter synthesized by primary producers.This may be a possible reason for the occurrence of 13C-enriched organic matter in the Cenozoic source rocks of the Western Qaidam Basin.Previous studies have shown that the high carbon number n-alkanes sourced from diatoms have no carbon preference.Hence,the sources of n-alkanes in regional source rocks are complex,and should be considered when discussing the sources of organic matter in future studies. | ZHANG YongDong SUN YongGe XIE LiuJuan JIANG AiZhu CHAI PingXia | 2011 | Chinese Science Bulletin2011，56，13： | 4 |
| 5 | Occurrence of Sciadopitys-like fossil wood (Coniferales) in the Jurassic of western Liaoning and its evolutionary implications显示文摘The genus Sciadopitys, containing a single species (S. verticillata), is the only extant representative of the Family Sciadopityaceae (Coniferales), and is a remarkable living fossil. Although some leafy fossils have been ascribed to Sciadopityaceae, fossil xylem material with a close affinity to this family is very rare, and there have been no fossils found showing both pith and primary xylem structures, which are of great importance for wood identification. Thus, it has been difficult to use fossils for the understanding of wood anatomy evolution in the sciadopityaceous plants over geological time. In this note we briefly report on Sciadopitys-like fossil wood found in the Middle Jurassic of western Liaoning, which bears well-preserved Protosciadopityoxylon-type secondary xylem, endarch primary xylem and heterogeneous pith. This is the first report of fossil specimens of the Sciadopityaceae with such detailed preservation of wood structures. The discovery provides precise anatomical evidence for reconstructing the evolu- tionary history and geographical distribution of Sciadopityaceae, as well as contributing to understanding of the fossil diversity of the Jurassic Yanliao Flora in northern China. | JIANG ZiKun WANG YongDong ZHENG ShaoLin ZHANG Wu TIAN Ning | 2012 | Chinese Science Bulletin2012，57，6： | 3 |
| 6 | Stable carbon isotope compositions of isoprenoid chromans in Cenozoic saline lacustrine source rocks from the Western Qaidam Basin,NW China:Source implications显示文摘Although the distribution of mono-,di-and trimethylated 2-methyl-2-(4,8,12-Trimethyltrideeyl) chromans(MTTCs) is well understood as an indicator of water salinity,their origin and formation mechanism are still ambiguous and under debate.In this paper,abnormally high levels of MTTCs were detected in Cenozoic saline lacustrine source rocks from the Western Qaidam Basin.Using a two-step column chromatography method,the MTTCs and naphthalenes were separated from other aromatic compounds and concentrated in one fraction,so that the stable carbon isotope compositions of these compounds could be accurately measured.Similar carbon isotope ratios for the mono-,di-and trimethylated 2-methyl-2-(4,8,12-Trimethyltrideeyl) chromans in a given sample suggest the MTTCs may share the same biological source(s).The MTTCs from the Western Qaidam Basin have similar carbon isotope compositions to primary producer-derived pristane and phytane.However,the ? 13C values for the MTTCs showed significant differences with other primary producers-derived biomarkers(e.g.C27 and C29 steranes),probably indicating a distinct microalgae source from specific niches for the MTTC compounds.We speculate that the MTTCs distribution patterns may be controlled by the water chemistry dynamics in niches,which,in turn,is affected by hypersaline bottom water. | ZHANG YongDong JIANG AiZhu SUN YongGe XIE LiuJuan CHAI PingXia | 2012 | Chinese Science Bulletin2012，57，9： | 3 |
| 7 | Diversity,Systematic and Evolution of Fossil Osmundaceous Ferns in China显示文摘The family Osmundaceae receives much concern of palaeobotanists for its peculiar sporangia and phylogenetic relationship.Abundant osmundaceous fossils have been reported in China.So far,about 34 species ascribed to seven genera of Osmundaceae have been documented except for three morphogenera. | Ning Tian,Yongdong Wang,Zikun Jiang Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008,China. | 2009 | 地学前缘2009，16，S1： | 2 |
| 8 | Synthesis and characterization of Y203:Eu powder phosphor by a hydrolysis technique显示文摘 | Jiang Yongdong Wang Zhonglin Zhang Fuli | 1998 | J Master Res1998，13，10： | 1 |
| 9 | A permeability model considering the effective stress and coal matrix shrinking effect 显示文摘 | ZHOU Junping XIAN Xuefu JIANG Yongdong | 2009 | Journal ofSouthwest Petroleum University: Science & Technology Edition2009，31，1： | 1 |
| 10 | The experi- ment on the features of ultrasonic vibration stimulating the absorp- tion and desorption of methane in coal显示文摘 | Jiang Yongdong Yang Xingyang Zhang Hailong | 2012 | Advanced Materials Re- search2012，，： | 1 |
| 11 | Evaluation of hydrocarbon generation of the Xiamaling Formation shale in Zhangjiakou and its significance to the petroleum geology in North China显示文摘The semi-closed pyrolysis simulation system under constant pressure was conducted to explore the characteristics and mechanisms of hydrocarbon generation from Xiamaling Formation shale in Xiahuayuan,North China.The experiment results indicate the oil generated by the Xiamaling Formation shale in oil window should be classified as 'aromatic-intermediate' type,whereas the decreasing of dry coefficient can be ascribed to the cracking of residual bitumen in source rock in the stage of high to post maturity.The amount of hydrocarbon gas generated from residual bitumen can be up to 1-2 m3 per ton rock in high to post mature stage by calculating hydrogen contents in the kerogen,the expelled hydrocarbon,and the residual hydrocarbon.This reveals the importance of residual bitumen as a gas source during high to post mature stage of the kerogen evolution,and also as the broad exploration prospect of these gases.This research highlights the attention should be paid to oil/gas reservoirs sourced from residual bitumen of organic-rich source rock in high mature stage,even the primary oil/gas reservoirs considered as the main exploration targets in middle-upper Proterozoic sediments of North China. | XIE LiuJuan SUN YongGe YANG ZhongWei CHEN JianPing JIANG AiZhu ZHANG YongDong DENG ChunPing | 2013 | Science China Earth Sciences2013，56，3： | 1 |
| 12 | Microstructures and mechanical properties of a low-cost three-dimensional needled carbon/silicon carbide composite显示文摘 | Cai Yanzhi Xu Yongdong Li Bin Fan Shangwu Zhang Litong Cheng Laifei Dong Benxing Jiang Juan | 2008 | Materials Science and Engineering A2008，497，12： | 1 |
| 13 | 显示文摘 | Jiang Yongdong Zhang Fuli | 1999 | Applied Physics Letters1999，，74： | 1 |
| 14 | Microstructures and mechanical properties of a low-cost three-dimensional needled carbon/silicon carbide composite显示文摘 | Yanzhi Cai Yongdong Xu Bin Li Shangwu Fan Litong Zhang Laifei Cheng Benxing Dong Juan Jiang | 2008 | Materials Science & Engineering A2008，，1： | 1 |
| 15 | The Phototropism of Jurassic Petrified Wood in North China Plate显示文摘Trees on the side directly exposed to sunlight generally grow faster than on the opposite side,a phenomenon termed plant phototropism.There are in situ vertical trunks of silicified wood in the Xiadelongwan area of Yanqing County,north Beijing,where the first National Geologic Park of Petrified Wood of China has been built since 2002.A few trunks have well-preserved growth rings.One petrified stump from the formation shows a positive phototropism direction of SW23O0.As compared with the modern normal growth stumps in Beijing plain area,which have a positive phototropism direction of SW210 °± 5°,the evidence of wood phototropism supports the conclusion of previous palaeomagnetic studies that the North China Plate has rotated clockwise since the Late Jurassic.The known petrified wood stumps in the Yanshan-Liaoning area are mainly found from the strata of 165-136 Ma,which corresponds to the main stage of the Yanshanian Movement. | JIANG Zikun LIU Benper HUANG Min DENG Shenghui LU Yuanzheng LIU Lu LI Mingming DONG Shuxin WANG Yongdong | 2014 | Acta Geologica Sinica(English Edition)2014，88，5： | 1 |
| 16 | Clinical significance of different bacterial load of Mycoplasma pneumoniae in patients with Mycoplasma pneumoniae pneumonia显示文摘 | Wujun Jiang Yongdong Yan Wei Ji Yuqing Wang Zhengrong Chen | 2013 | Brazilian Journal of Infectious Diseases2013，，： | 1 |
| 17 | Lipid Evidence for Oil Depletion by Sulfate-Reducing Bacteria during U Mineralization in the Dongsheng Deposit显示文摘Fatty acids were extracted from fluid inclusions, and analyzed for distribution and individual δ13 C values to determine if there exists sulfate-reducing bacteria(SRB) and what substrates SRB depleted during U mineralization in the Dongsheng deposit. The 10-methylhexadecanoic acid(10 Me16:0) has been detected from most of the samples using GC-MS based on relative retention time and co-injection of standard 10 Me16:0 compound. Samples with higher 10 Me16:0 concentrations, show higher U contents. The presence of 10 Me16:0 along with iso-ω7-cis-heptadecenoic acid(i17:1ω7 c) and ω7-cisoctadecenoic acid(18:1ω7 c) in the fluid inclusions may indicate the occurrence of SRB during the U mineralization. Saturated fatty-acids and unsaturated fatty-acids detected in this study have individual δ13 C values from-30.3‰ to-28.5‰ and-30.5‰ to-27.9‰, respectively. These values are close to those of n-alkanes of the associated oils and the bulk oils, but significantly distinct from methane, thus the oils are concluded to have been used as substrate for the microorganisms to survive on. This proposal is supported by oil biodegradation and ore-stage calcite cement with δ13 C values from-1.4‰ to-17.2‰. | Tiankai Wang Lei Jiang Chunfang Cai Yuyang Yuan Yongdong Zhang Lianqi Jia Shuangling Chen | 2018 | Journal of Earth Science2018，29，3： | 1 |
| 18 | Preliminary investigations on fossil diversity variation of Mesozoic Marattialean ferns in China显示文摘The Marattiales is one of the oldest lineages of vascular plants with extensive fossil records dated back to the Carboniferous. Understanding the fossil diversity variation and distribution pattern is helpful for exploring the evolutionary history of this fern group. In this work, the preliminary analysis of diversity change and distribution of the Mesozoic Marattialean fossil records in China are reported covering the Triassic and Jurassic periods based on available published data. In addition, a brief discussion is made regarding to the potential causes for these variation and distribution of this fern group. | Zikun JIANG Yongdong WANG Ning TIAN | 2008 | Global Geology2008，11，3： | 0 |
| 19 | Space-time evolution rules study on acoustic emission location in rock under cyclic loading显示文摘An acoustic emission(AE)location experiment was performed on sandstone using an advanced AE test system.The space-time evolution rule regarding damage was analyzed under cyclic loading as well as AE.The results show that AE on static loading process is consistent with the damage evolution rule of compression and the elastic-plastic deformation phase;at the beginning of cyclic loading with low duration time and energy,AE events came from a small crack.The location result showed that most events occurred in the core zone forming at the static loading process,and the location points changed slowly.AE energy changed little during the metaphase of cyclic process.There was a modest increase of location points in every cycle.The tendency of steady development could be predicted from the AE location events.At the end of each cyclic loading,the quantity of AE events and energy increased quite rapidly,reaching a maximum at the last cycle.AE events had high energy and duration time.Location events changed quite rapidly and assembled and linked continuously in the core zone.At the same time,they expanded to the top of specimen.A macroscopic crack finally formed.In the postfailure process,some AE events still existed due to fracturing of gliding friction.Owing to the inner stress balance of rock even after loading stopped,minor AE events still occurred. | Jiang XU Xiaojun TANG Shuchun LI Yunqi TAO Yongdong JIANG | 2009 | Frontiers of Structural and Civil Engineering2009，3，4： | 0 |
| 20 | Experimental Study on Sawing Characteristics of Planted Eucalyptus grandis显示文摘To use eucalyptus as solid wood products in value-added way instead of wood chips for pulp and paper, the sawing characteristics of E. grandis was studied, the strain changes in sawing process, bow deformation and end-splits of lumber were analyzed. The results showed that the sawing strain changed in a random way, but the bow deformation had an evident regularity, the lumber near its bark had a big bow deformation. The end-splits had severe influence to lumber recovery, 15% of lumber recovery was influenced by end-splits. The results also indicated that planted E. grandis was a potential wood species as solid wood utilization in the fast-growing plantation. | ZHOU Yongdong JIANG Xiaomei PIAO Chenghan | 2006 | Chinese Forestry Science and Technology2006，5，3： | 0 |
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