A Potential Global Standard Stratotype-Section and Point of the Moscovian Stage (Carboniferous)     

WANG Xiangdong  QI Yuping  Lance LAMBERT  WANG Zhihao  WANG Yue  HU Keyi  LIN Wei  CHEN Bo 《《地质学报》英文版》2011,85(2):366-372

Conodonts and fusulinids are the two most widely used biotic groups for subdividing and correlating Bashkirian and Moscovian strata. The definition of the base of the Global Moscovian Stage is undecided because there are many disagreements among existing boundary definition proposals, each of which has disadvantages. Declinognathodus donetzianus is easily recognized but somewhat limited in its paleogeographic distribution. Idiognathoides postsulcatus is slightly more widespread, but it is less easily identified and its occurrences may be diachronous from region to region. Diplognathodus ellesmerensis is easily recognized and even more widespread, but it is usually rare and its ancestry is not adequately known. The Naqing Section of South Guizhou, South China contains diverse conodont evolutionary lineages among different taxa, including Idiognathoides, Idiognathodus, Diplognathodus, Neognathodus, Gondolella and Mesogondolella. There are numerous transitional forms in almost every lineage of the Naqing section, which shows that the prospects for South China to play a critical role in determining the basal Moscovian Stage definition are good.  相似文献   

Hydrothermal Alteration and Gold Mineralization in the Jiaojia Gold Deposit,Jiaodong Peninsula, China     

ZHANG Binglin  YANG Liqiang  WANG Zhongliang  LIU Yue  ZHAO Rongxin 《《地质学报》英文版》2014,88(Z2):835-836

Please refer to the attachment(s) for more details  相似文献   

Isotope Geochemistry of the Dayingezhuang Gold Deposit, Jiaodong Peninsula, China: Insights for Gold Mineralization     

ZHANG Liang  YANG Liqiang  WANG Zhongliang  GUO Linnan  LIU YueLIU Yue  LI Ruihong  HUANG Tao  ZHANG Ruizhong 《地质学报》2014,88(Z2):1586-1587

Please?refer?to?the?attachment(s)?for?more?details.  相似文献   

Salt-Lake Basin Bedrock Weathered Crust Gas Reservoir in the Altun Mountains Front of the Qaidam Basin,Western China     

ZHANG Yongshu  JIA Chengzao  LI Guoxin  LI Jiangtao  WANG Bo  ZHAO Fan  YUE Dali  SHI Zhenghao  ZHU Jun  WANG Yuanfei  ZHANG Yi  CHEN Yangyang  ZHANG Fenying  YU Xue  XU Li  Hou Lili  SONG Yue 《《地质学报》英文版》2023,97(5):1555-1567

The bedrock weathered crust in front of the Altun Mountains in the Qaidam Basin, western China, is different from others because this is a salt-lake basin, where saline water fluid infiltrates and is deposited in the overlying strata. A large amount of gypsum infills the bedrock weathered crust, and this has changed the pore structure. Using core observation, polarized light microscopy, electron probe, physical property analysis and field emission scanning electron microscopy experiments, the ch...  相似文献   

Characteristics and variation law of wind-blown sand delivered to the NingxiaeInner Mongolia reach of the Yellow River under a changing environment     

Zhichun Yue  Ximin Yuan  Lugan Cao  Fuchang Tian  Chao Han  Hongwu Zhang 《国际泥沙研究》2022,(2)

Wind-blown sand is one of the key factors affecting the evolution of sediment transport,erosion,and deposition in rivers crossing desert areas.However,the differences and complex variations in the spatial and temporal distribution of the underlying surface conditions are seldom considered in research on the river inflow of wind-blown sand over a long time period.The Yellow River contains a large amount of sediment.The NingxiaeInner Mongolia reach of the Yellow River was selected as the research area of the current study.The reach flows out of Heishanxia and then flows through the Tengger,Hedong,Ulan Buh,and Kubuqi Deserts.In the current study,the wind speed,vegetation coverage,and sand matter on the river basin's surface were analyzed from the perspectives of the river basin surface and riverbank line.The vegetation coverage of the river basin's surface was calculated using the normalized difference vegetation index.Based on the types of sand matter,vegetation coverage,and other underlying surface conditions,the loose particle sediment transport efficiency was determined,the Lettau and Lettau formula for the sediment transport rate was modified,a surface wind-erosion sand flux model was established,and the amount of wind-blown sand transported into the NingxiaeInner Mongolia reach was calculated.The results show that,from 1981 to 2014,the annual average amount of wind-blown sand transported into the main stream and tributaries of the NingxiaeInner Mongolia reach of the Yellow River were 7,310,000 and 13,190,000 t,respectively.The ShizuishaneBayangole reach received 51%of the total wind-blown sand that transported into the main stream,while the tributaries in the Shidakongdui area were the most important source wind-blown sand,providing 74%of the total windblown sand inflow from the tributaries.In recent years,the amount of sand transported into the river of the mainstream and tributaries of the NingxiaeInner Mongolia reach of the Yellow River has significantly decreased from 1981 to 2002,particularly in 1993e2002,which is mainly the result of the weakening wind speed,increasing vegetation coverage,and embankment construction.More specifically,environmental protection policies led by the government,such as“returning farmland to forest”,have played an important and positive role.Therefore,when regulating the water and sediment in the NingxiaeInner Mongolia reach of the Yellow River,the issue of wind-blown sand deposition into the river should be fully considered in water and sediment regulation.  相似文献   

The open of the Paleo-Tethys Ocean: inferred from the Early Paleozoic ophiolite in the Qiangtang area, northern Tibetan plateau     

ZHAI Qingguo  LI Cai  WANG Jun  HU Peiyuan  TANG Yue  WANG Haitao 《《地质学报》英文版》2018,92(Z2):43-43

  相似文献   

The Mid-Pleistocene Climate Transition Recorded in a 1.6 Myr-Period Lacustrine Sediment Sequence from Mazatage, Tarim Basin     

LIU Jian  WU Li  WANG Rujian  ZHAO Yue 《《地质学报》英文版》2015,89(1):312-313

<正>The mid-Pleistocene climate transition(MPT)has been widely reported in worldwide geological events.As a key issue of the Quaternary geology,it has attracted much attention from the paleoclimate community.MPT refers to a period lasting for several hundreds of thousand years,during which the dominant climate periodicity gradually extended from 41 kyr to 100 kyr(Ruddiman et al.,1989),and glacial-interglacial climate difference became more  相似文献   

Effectiveness Analysis of 90 Degree Phase Rotation Technology in Thin Reservoir Prediction     

LI Tingting  ZHAO Yanqi  ZHANG Xingxing  SHI Yue 《《地质学报》英文版》2015,89(Z1):349-351

<正>1 Introduction Seismic waveform reflects the basic information of seismic data which mainly includes seismic amplitude,phase,frequency etc.Zero-phase wavelet has high signalto-noise ratio,high resolution and the characteristic of symmetry.But in the case of thin layer,the zero-phase  相似文献   

Analysis of temperature field characteristics based on subgrade site measurements of Harbin-Qiqihar High-speed Railway in a deep seasonal frozen soil region     

ZuRun Yue  BoWen Tai  TieCheng Sun 《寒旱区科学》2015,7(5):547-553

Recent years have seen a large number of high-speed railways built and will be built in seasonal frozen soil regions of China. Although high-speed railways are characterized by being fast, comfortable and safe, higher standards for deformation of the railways' frozen subgrade are required. Meanwhile, changes in subgrade soil temperatures are the main factors affecting the deformation of frozen subgrade. Therefore, this paper selected typical test subgrade sections of the Harbin–Qiqihar Line, a special line for passenger transport built in the deep seasonal frozen soil regions of China, to monitor field temperatures. Also, the temperature changing laws of railways' subgrade in this region was analyzed by using testing data, the aim of which is to provide a technical support for future design and construction of buildings and structures in a deep seasonal frozen soil region.  相似文献   

Long-term transit timing monitoring and homogenous study of WASP-32     

Lei-Lei Sun  Sheng-Hong Gu  Xiao-Bin Wang  Andrew Collier Cameron  Dong-Tao Cao  Yi-Bo Wang  Yue Xiang  Ho-Keung Hui  Chi-Tai Kwok  Bill Yeung  Kam-Cheung Leung 《天文和天体物理学研究(英文版)》2015,(1):117-126

We report new photometric observations of the transiting exoplanetary system WASP-32 made by using CCD cameras at Yunnan Observatories and Ho Koon Nature Education cum Astronomical Centre, China from 2010 to 2012. Following our usual procedure, the observed data are corrected for systematic errors according to the coarse decorrelation and SYSREM algorithms so as to enhance the signal of the transit events. Combined with radial velocity data presented in the literature, our newly observed data and earlier photometric data in the literature are simultaneously analyzed to derive the physical parameters describing the system by employing the Markov chain Monte Carlo technique. The derived parameters are consistent with the result published in the original paper about WASP-32b, but the uncertainties of the new parameters are smaller than those in the original paper. Moreover, our modeling result supports a circular orbit for WASP-32b. Through the analysis of all available mid-transit times, we have refined the orbital period of WASP-32b; no evident transit timing variation is found in these transit events.  相似文献