| 1 | Geochemistry of trace elements and Sr-Nd isotopes of foraminifera shell from the Okinawa Trough显示文摘Trace elemental associations and Sr-Nd isotopic compositions are of important to recognition of biogenic material from mixed marine sediments. The foraminifera shell from the Okinawa Trough strongly enriches Sr,P,Mn and Ba, enriches Li,U,Th,Sc,Co,Cu,Pb,Zn,Cr,Rb,Y,Sb and light rare earth elements,slightly enriches V,Ga,Zr,Nb,Cd and middle rare earth elements,is short of Mo,In,Sn,Cs,Hf,Ta,W,Ti,Bi and heavy rare earth elements. The mechanism of elemental enrichment in forminifera is the concentrations of trace elements in sea water and selective absorption of trace elements during foraminifera living, as well as the geochemical affinity between major elements and trace elements.The REE (rare earth elements)partition pattern of foraminifera shell of the Okinawa Trough shows enrichment of middle rare earth elements with slightly negative Ce anomaly,which are different from those of foraminifera of the Pacific Ocean.The Sr,Nd isotopic ratios of the Okinawa Trough foraminifera are 0 709 769 and 0 512 162,respectively, which are different not only from those of oceanic water, but also from those of river water of China’s Mainland, the former is slightly higher than those of oceanic water,but much lower than those of river water;the latter is slightly lower than those of oceanic water,but higher than those of river water,demonstrating that the Okinawa Trough sea water has been influenced by river water of China’s Mainland. | Meng Xianwei 1,2 ,Du Dewen 1,2 ,Cheng Zhenbo 11 .FirstInstituteofOceanography ,StateOceanicAdministration ,Qingdao 2 6 6 0 6 1,China2 .KeyLaboratoryofMarineScienceandNumericalModeling ,StateOceanicAdministration ,Qingdao 2 6 6 0 6 1,China | 2001 | Acta Oceanologica Sinica2001，20，1： | 4 |
| 2 | Types of Organic Fades and Source Rock Assessment of the Coal-Measure Mudstone in the Turpan-Hami Basin显示文摘This paper discusses the enviromental characteristics of carbonaceous mudstone and mudstone (coal-measure mudstone in short) of the Early and Middle Jurassic in the Turpan-Hami basin, which were formed in swamps. Through the organic facies study of the coal-measure mudstone in this area, the authors clarify that the flowing-water swamp is the most advanced organic facies belt. Furthermore, according to the practical materials of coal-measure mudstone in the area and with the evaluation criteria of lacustrine mudstone in the past, the authors have established the integrated symbol systems from the abundance of organic matter and the type of organic matter, which can be used in the source rock evaluation of the coal-measure mudstone. | ZHAO Changyi, DU Meili, SHAO Longyi, CHEN Jianping,CHENG Kerning and HE ZhonghuaResearch Institute of Petroleum Exploration and Development,China National Petroleum Corporation, 20 Xueyuan Rd., Beijing 100083Beijing Graduate School of China University of Mining and Technology,11 Xueyuan Rd., Beijing 100083 | 1998 | Acta Geologica Sinica(English Edition)1998，72，2： | 2 |
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