NEOTECTONICS ALONG THE EASTERN MARGIN OF THE TIBETAN PLATEAU: INFERENCES FROM BEDROCK RIVER INCISION PATTERNS     

Eric Kirby  Kelin X.Whipple  Tang W.  B.C.Burchfiel  Chen Z. WT  ”BX 《地学前缘》2000,(Z1)

NEOTECTONICS ALONG THE EASTERN MARGIN OF THE TIBETAN PLATEAU: INFERENCES FROM BEDROCK RIVER INCISION PATTERNS1　ChenZ,BurchfielBC ,LiuY ,etal.GPSmeasurementsfromeasternTibetandtheirimplicationsforIndia/Eurasiaintracon tinentaldeformation[J] .JournalofGeophysicalResearch ,2 0 0 0 (inpress) . 2　KingRW ,ShenF ,BurchfielBC ,etal.GeodeticmeasurementofcrustalmotioninsouthwestChina.Geology,1997,2 5,179～ 182 . 3　KirbyE ,WhippleKX ,Burchfie…  相似文献   

Implementation of the European Marine Strategy Framework Directive: a methodological approach for the assessment of environmental status, from the Basque Country (Bay of Biscay)     

Borja A  Galparsoro I  Irigoien X  Iriondo A  Menchaca I  Muxika I  Pascual M  Quincoces I  Revilla M  Germán Rodríguez J  Santurtún M  Solaun O  Uriarte A  Valencia V  Zorita I 《Marine pollution bulletin》2011,62(5):889-904

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Dioxin-like compounds in sediments from the Daliao River Estuary of Bohai Sea: distribution and their influencing factors   总被引：1，自引：0，他引：1  

Zhao X  Zhang H  Fan J  Guan D  Zhao H  Ni Y  Li Y  Chen J 《Marine pollution bulletin》2011,62(5):918-925

The concentrations, compositional profiles, and potential ecological risk of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs) and polychlorinated naphthalenes (PCNs) in sediments of the Daliao River Estuary were investigated. Total concentrations of PCDD/Fs, PCBs, and PCNs were in the range of 11.3-133.2 ng/kg dry weight (dw), 1 971-37 632 ng/kg dw and 33.1-284.4 ng/kg dw, respectively. The total TEQ values varied from 0.37 to 4.08 ng/kg dw, with the dominant contributions by PCDD/Fs, then by PCBs and PCNs. The spatial distributions of PCDD/Fs, PCBs and PCNs in the river estuary were much related to hydrodynamic conditions. The risk of contamination to the deeper sea was increased in the flood seasons. Moreover, our data confirmed that both organic matter in sediments and molecular properties of dioxin-like compounds were the factors which strongly influenced the partition behavior of these dioxin-like compounds between sediments and water phase in the estuarine zone.  相似文献   

Sorption of heavy oil onto Jiaozhou Bay sediment     

Cao X  Yang G  Wei S  Han H 《Marine pollution bulletin》2011,62(4):741-746

The sorption of heavy oil onto sediment collected from Jiaozhou Bay was studied in a series of kinetic and equilibrium experiments using NaCl solutions. The effects of temperature, salinity, and pH of the medium on sorption behavior were investigated.Sorption equilibrium of the heavy oil and sediment was established within 60 min. The process was shown to follow a pseudo-second-order kinetic rate model. The sorption rate decreased with increasing initial heavy oil concentration in the solution. Batch equilibrium experiments showed that the sorption isotherm could be described by the Freundlich model. The standard free energy change and enthalpy change at the temperatures studied (283, 288, 293, and 298 K) were negative. These findings indicated that the process was spontaneous and exothermic. Salinity, pH and temperature influenced sorption performance. Sorption was favored by higher concentrations of NaCl, by lower pH values and by lower temperatures.  相似文献   

Oil spill detection with fully polarimetric UAVSAR data   总被引：3，自引：0，他引：3  

Liu P  Li X  Qu JJ  Wang W  Zhao C  Pichel W 《Marine pollution bulletin》2011,62(12):2611-2618

In this study, two ocean oil spill detection approaches based on four scattering matrices measured by fully polarimetric synthetic aperture radar (SAR) are presented and compared. The first algorithm is based on the co-polar correlation coefficient, ρ, and the scattering matrix decomposition parameters, Cloud entropy (H), mean scattering angle (α) and anisotropy (A). While each of these parameters has oil spill signature in it, we find that combining these parameters into a new parameter, F, is a more effective way for oil slick detection. The second algorithm uses the total power of four polarimetric channels image (SPAN) to find the optimal representation of the oil spill signature. Otsu image segmentation method can then be applied to the F and SPAN images to extract the oil slick features. Using the L-band fully polarimetric Uninhabited Aerial Vehicle – synthetic aperture radar (UAVSAR) data acquired during the 2010 Deepwater Horizon oil spill disaster event in the Gulf of Mexico, we are able to successfully extract the oil slick information in the contaminated ocean area. Our result shows that both algorithms perform well in identifying oil slicks in this case.  相似文献   

Chemical characterization of naturally weathered oil residues in the sediment from Yellow River Delta, China   总被引：2，自引：0，他引：2  

Wang C  Du J  Gao X  Duan Y  Sheng Y 《Marine pollution bulletin》2011,62(11):2469-2475

With its close proximity to Shengli Oilfield, China’s second largest oilfield, the Yellow River Delta is at high risk for crude oil contamination. The massive oil discharge in oilfield may offer a chance for a natural experiment to investigate compositional changes of oil residues and study the stability of source- and weathering-dependent molecular parameters in oil residues after spills. The results demonstrate that the conventional diagnostic ratios, such as C₂₉20S/(20S + 20R), C₂₉/C₃₀H, C₃₀βα/αβ, C₃₁22S/(22S + 22R), C₂-DBTs/C₂-PHENs, C₃-DBTs/C₃-PHENs, DBT/MCHRY, CHRY/PHENs, are also valid for oil source identification even after extensive weathering of spilled oils in terrestrial environment, although some exceptions were encountered for extensively weathered sample. Moreover, the ratios of selected specific biomarkers (the oleanane index, the gammacerane index) have been developed and assessed as source indicators. Finally, we find that some maturity parameters based on alkyl naphthalenes and methyl phenanthrenes in petroleum geochemistry, such as the methylnaphthalene ratios (TMNr, TeMNr, PMNr), the methylphenanthrene ratios (MPI-1, MPDF), can be applied for the source identification and correlation at their lightly to moderately weathered stage.  相似文献   

Environmental capacity of nitrogen and phosphorus pollutions in Jiaozhou Bay, China: modeling and assessing   总被引：2，自引：0，他引：2  

Han H  Li K  Wang X  Shi X  Qiao X  Liu J 《Marine pollution bulletin》2011,63(5-12):262-266

In recent years, with the development of society and economy of Qingdao, environment and ecosystem problems, for instance, red ties, become more and more serious in Jiaozhou Bay, China, because of the increasing pollutants discharged into it. In order to solve these problems, an eco-hydrodynamic model is constructed to estimate the marine environmental capacity of nitrogen and phosphorus nutrients in Jiaozhou Bay, whose simulation results are rational for the bay. According to the model, if the target is set to achieve water quality (grade II) in Jiaozhou Bay, the environmental capacity of dissolved inorganic nitrogen and phosphorus in one year are approximately 7800 and 840 tons, respectively. Thus our research offers necessary scientific foundation to the total loads control efforts in this area.  相似文献   

三氧化氙氧化四价铀的化学发光反应及其在分析上应用的可能性     

X.  ЛА 张延安 《国外铀金地质》1990,(2):80-82

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关于伯朝低地北部的晚更新世和早全新世纪质年代和古地理的新资料     

X.A.ApcлaHOB  罗 《国外第四纪地质》1990,(1):17-24

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Relict Paleo-Asian Ocean subduction zones within the continental lithosphere: Insights from deep seismic reflection profiles     

H. Hou  R. Gao  W. Fu  A. Kr?ner  X. Zhang  J. Zhou  J. Yang  R. Guo 《《地质学报》英文版》2018,92(Z1):370-371

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