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The evidence of fossil carbon isotopes of the climatic event at the beginning of Quaternary

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Chinese Science Bulletin 1999年第5期44卷 477-480页

作者： Tao Deng xiangxu xue Junshe Dong Chinese Acad Sci Inst Vertebrate Paleontol & Paleoanthropol Beijing 100044 Peoples R China NW Univ Xian Dept Geol Xian 710069 Peoples R China

Tooth enamel of mammalian fossils can efficiently preserve the original carbon isotopic composition when they lived. The ungulate fossils, especially equids in the early Early Pleistocene Bajiazui fauna from Qingyang, Gansu are studied. According to the enriched relation of carbon isotopes between mammalian tooth enamel and grass diets, the fractions of C3 and C4 plants in this region at that time are reconstructed, which indicates that C3 grass occupied a dominant position. Because C3 grass adapts itself to cold and damp climates, our analytic results show that the time of the Bajiazui fauna was in a critical state between a glacial stage beginning and a summer monsoon retreat, and it was a reflection to the turning cold event of the global climate at the beginning of the Quaternary.

关键词： climatic event Quaternary ungulate carbon isotope.

A New Fossil Erinaceidae from the Shajingyi Area in the Lanzhou Basin, China

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Acta Geologica Sinica(English Edition) 2019年第4期93卷 789-798页

作者： LI Zhichao LI Yongxiang xue xiangxu LI Wenhou ZHANG Yunxiang YANG Fu School of Earth Science and Resources Chang’an UniversityXi’an 710054China State Key laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China Key Laboratory of Coal Resources Exploration and Comprehensive Utilization Ministry of Land and ResourcesXi’an 710021China

Here,we describe a new primitive Erinaceidae species,Oligoechinus lanzhouensis ***.,based on a specimen from late Oligocene strata of the Lanzhou Basin,Gansu *** characteristics are as follows:the M1 width is longer than the length,the metastyle extends far disto-labially,the posterior margin has strong curve and a distinct metaconule that is connected to the protocone by a postprotocrista is located in the centre of the *** posterior arm of the metaconule is poorly *** the P4,the pterion of the metastyle is less developed and the metacone is *** addition,*** has a premolar larger than the canine tooth(P2>C)and P3 had no molarisation,characters also possessed by ***,*** was similar to Mioechinus based on architectural tooth features,demonstrating a closed genetic *** Erinaceidae are relatively rare before the *** discovery of *** provides an important insight into the origin of Mioechinus in China and the early evolution of the *** analysis shows that a relatively recent ancestor of Mioechinus had probably existed in the early Oligocene and that *** was likely an ancestral type of Mioechinus gobiensis,and its systematic position should be located at a transitional position between Amphechinus and Mioechinus.

关键词： Erinaceidae Oligoechinus Lanzhou basin Oligocene

NEW MATERIALS OF DINOCROCUTA GIGANTEA FOUND IN FUGU COUNTY, SHAANXI PROVINCE

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古脊椎动物学报(中英文） 1996年第1期 25-26页

作者： Zhang Yunxiang xue xiangxu(Department of Geology Institute of Cenozoic Geology and Environment Northwest University Xi'an 710069)

Dinocrocuta gigantea was erected by M. Schlosser in 1903. Since then, there were very few materials of Dinocrocuta gigantea to be found, and most of them unknown provenances. In 1986, a large quantity of Hipparion fauna fossils were yeilded in Laogaochuan, Fugu County, Shaanxi Province, among which, there are some materials of Dinocrocuta gigantea, including a complete skull, an anterior part of skull with all teeth, broken lower jaws, 10 isolate teeth, humerus and proximal part of ulna of same individual, femur etc.

关键词： Fugu Shaanxi Late Miocene Dinocrocuta gigantea

New fossils of the Early Pleistocene Equus huanghoensis(Equidae,Perissodactyla)from Nihewan in Hebei Province of China

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Science China Earth Sciences 2016年第10期59卷 83-94页

作者： LI YongXiang ZHANG YunXiang SUN BoYang AO Hong xue xiangxu State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi'an 710069China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710061China Tianjin Museum of Natural History Tianjin 300201China

This paper describes new fossils of Equus huanghoensis from an Early Pleistocene bed in Nihewan, Hebei Province, which confirms the classification of E. huanghoensis by Chinese researchers. The new fossils include a relatively complete male skull and mandible with all upper and lower dentition, a broken female skull with fragment of mandible and a broken Mc III of Equus sp. The fossils were collected from the Yangshuizhan site of Nihewan. The age of the formation is about 1.6 Ma. The new materials verify some classification characteristics based on teeth published in previous descriptions. These characteristics include large teeth size, short protocone, and tilted protoloph and metaloph. We have added to these characteristics of large skull size, a developed protuberantia supramagna, pentagonal nuchal side, weak Pli cabaline, simple enamel plications; a series of new characteristics strikingly different from the other Equus horses. The broken Mc III is similar to Equus qingyangensis from Qingyang, Gansu.

关键词： Nihewan Early Pleistocene Equus huanghoensis New fossils

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The microtine distribution and its environmental significance since the Middle Pleistocene in Zhangping Caves of the Qinling Mountains

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Science China Earth Sciences 2008年第2期51卷 294-299页

作者： LI YongXiang1 & xue xiangxu1,2 1 State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Institute of Cenozoic Geology and Environment, Xi’an 710069, China 2 Institute of Earth Environment, State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences, Xi’an 710075, China 1. State Key Laboratory of Continental Dynamics Department of Geology Northwest University Institute of Cenozoic Geology and Environment Xi’an 710069 China 2. Institute of Earth Environment State Key Laboratory of Loess and Quaternary Geology Chinese Academy of Sciences Xi’an 710075 China

Three microtine species are recovered from the Zhangping Caves of the Qingling Mountains, namely Microtus oeconomus, Caryomys inez and Caryomys eva. They are climate-sensitive ones with different ecological habits, therefore their distribution well corresponds to environmental variations. Statistical comparison of the distribution of fossil microtines and their counterparts nowadays displays that the climate variation of the studied area and its contiguity since the middle Pleistocene are: warm and humid at 493 ka ago, cool and humid at 259 ka ago―cold and humid at 205 ka ago―cool and humid at 28 ka ago, and warm and dry at present.

关键词： environmental variation since Middle Pleistocene microtine fossils Zhangping Caves of the Qinling Mountains

Paleoenvironments indicated by the fossil mammalian assemblages from red clay-loess sequence in the Chinese Loess Plateau since 8.0 Ma B.P.

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Science China Earth Sciences 2006年第5期49卷 518-530页

作者： xue xiangxu1,2, ZHANG Yunxiang1,2 & YUE Leping1,2 1. State Key Laboratory of Continent Dynamics (Northwest University), Institute of Cenozoic Geology and Environment, De- partment of Geology, Northwest University, Xi’an 710069, China 2. Institute of Earth Environment, State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences, Xi’an 710075, China 1. State Key Laboratory of Continent Dynamics (Northwest University) Institute of Cenozoic Geology and Environment Department of Geology Northwest University Xi’an 710069 China 2. Institute of Earth Environment State Key Laboratory of Loess and Quaternary Geology Chinese Academy of Sciences Xi’an 710075 China

Information from eleven profiles of eolian earthy red silty clay and loess of the middle of the Late Miocene to Holocene age have been studied and correlated. A complete summary profile with projected isotopic ages and fossil-bearing beds has been assembled. The profile is subdivided into 12 stratigraphic units proceeding from the lower (older) to the upper (younger) one. The character of mammalian assemblages contained in each unit was analyzed and the corresponding pa- leo-climatic environments were deduced. The environmental character of each period and the change from the middle of the Late Miocene at about 8.0 Ma B.P. up to the Holocene progressed from the hot semiarid and semi-moist, warmer-moist, warm-moister of the Late Miocene. To slightly less warm moist, cool-dry, slight-warmer-moister of the Pliocene; later the cool to cold dry periods alternated frequently with the mild semiarid and semi-moist periods of the Quaternary. Vegetation progressed from the grasslands with sparse woods, wooded shrub-grasslands and subtropical forest-grasslands of the Late Miocene age to sparse grasslands and dry grasslands of the Pliocene; and to sparse grasslands, dry grasslands and tundras of the Quaternary. The climate changes in the Neogene were of low-amplitute in a generally warm-humid background. Those of the Quaternary were of higher am- plitude with a longer phase. Cool or cold dry and slightly warm semiarid and semi-moist climates al- ternated on a generally cool-dry background. The tendency since the start of the Quaternary was the change to more northern and western shift in the Loess Plateau, with progressively cooler and dryer conditions. The dramatic uplift of the Qinghai-Xizang (Tibet) Plateau and the forming and expansion of the Arctic ice sheet might be the main reasons of the more pronounced changes in the Quaternary.

关键词： paleoenvironment, mammalian fossils, eolian red clay-loess sequence, Loess Plateau.

陕晋上第三系静乐红粘土及有关问题的初步讨论

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地层学杂志 1999年第4期23卷 310-315页

作者：张云翔岳乐平薛祥煦西北大学地质系新生代地质与环境研究所陕西西安710069

静乐组指含有较丰富结核的紫红色风成粘土，在建组时未指定正层型，缺少进一步工作的对比标准，建议以陕西蓝田段家坡剖面作为静乐组的次层型候选剖面。原以山西静乐贺丰为层型的上新世静乐阶含义不清，应该尽快建立上新世榆社期对应的... 详细信息

静乐组指含有较丰富结核的紫红色风成粘土，在建组时未指定正层型，缺少进一步工作的对比标准，建议以陕西蓝田段家坡剖面作为静乐组的次层型候选剖面。原以山西静乐贺丰为层型的上新世静乐阶含义不清，应该尽快建立上新世榆社期对应的年代地层单位。从目前研究结果看，静乐组分布十分广泛，其发育程度甚至超过保德组。

关键词：上第三系静乐组划分对比陕西山西红粘土

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记岭南(犭亚)(Linnania)一新种

西北大学学报(自然科学版) 1986年第3期 67-72页

作者：薛祥煦西北大学地质系

本文记述岭南?兽一新种—秦岭岭南?（Iinnania qinglingensis ***.）。化石标本采自陕西省洛南县石门卿的樊沟,早—中古新世樊沟组(E1f1-2)中。新种与广东南雄产的岭南?属型种—罗佛寨岭南?（***）很相似,但差异仍然明显,应代表一新种... 详细信息

本文记述岭南?兽一新种—秦岭岭南?（Iinnania qinglingensis ***.）。化石标本采自陕西省洛南县石门卿的樊沟,早—中古新世樊沟组(E1f1-2)中。新种与广东南雄产的岭南?属型种—罗佛寨岭南?（***）很相似,但差异仍然明显,应代表一新种。秦岭岭南?比罗佛寨岭南?粗壮硕大这一特点,同样表现在两个盆地相同层位产出的其它化石上,是具体分析二盆地动物群生活环境特点值得注意的地方。

关键词：下前尖石门标本开拓巷道跟座 Linnania 三角座颊齿

记洛川大角鹿(新种)Megaloceros luochuanensis(***.)

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古脊椎动物与古人类 1982年第3期 228-235页

作者：薛祥煦西北大学地质系

陕西洛川黑木沟有发育完好的黄土剖面。各黄土层中几乎都产有哺乳类化石,找到者以鼢鼠类为主。中更新统中(或中上)部的洛川大角鹿(Megaloceros luochuanensis)是一新种,其主要构造特征介于扁角大角鹿及河套大角鹿之间。

关键词：大角鹿新种演化阶段分布层位