检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

菲律宾海北部底质沉积中的深海介形类

微体古生物学报 2011年第1期28卷 22-29页

作者：赵泉鸿吴永华石学法同济大学海洋地质国家重点实验室上海200092 海洋沉积与环境地质国家海洋局重点实验室国家海洋局第一海洋研究所青岛266061

对琉球群岛东侧的菲律宾海北部海区(27.0°-30.0°N,129.5°-135.5°E)水深1666m至6616m的123个表层沉积物样品进行了定量微体古生物学研究。仅在38个样品中发现介形类,主要分布在4000m以浅水深区。初步鉴定有21属35种,其中Krithe在样... 详细信息

对琉球群岛东侧的菲律宾海北部海区(27.0°-30.0°N,129.5°-135.5°E)水深1666m至6616m的123个表层沉积物样品进行了定量微体古生物学研究。仅在38个样品中发现介形类,主要分布在4000m以浅水深区。初步鉴定有21属35种,其中Krithe在样品中的出现率和丰度最高,其次常见的还有Poseidonamicus,Henryhow-ella asperi ma,Cytheropteron,Pennyella,Aversovalva subformis,Pseudobosquetina mucronalatum和Legiti mo-cythere acanthoderma。建立了3个新种Aversovalva paraformisZhao ***.,Cytheropteron houaeZhao ***.和Pennyella microreticulataZhao ***.。

关键词：深海介形类新种表层沉积菲律宾海

Chemical composition and Effect of tourism in aerosol samples collected at typical temperate glacier region from the southeastern Tibetan Plateau,china

在线全文

学校读者我要写书评

暂无评论

Chemical composition and Effect of tourism in aerosol sample...

第十届全国气溶胶会议暨第六届海峡两岸气溶胶技术研讨会

作者： Zhang Ningning1,He Yuanqing1,2,Pang Hongxi1,3,He Xianzhong4,Wang Linlin5(1.State key laboratory of Cryspheric science,Cold and Arid Regions environmental and Engineering Research Institute,CAS,Lanzhou 730000,china 2.Institute of Tibetan Plateau Research,CAS,Beijing 100029,china 3.State key laboratory of Marine geology,Tongji university,Shanghai 200092,china 4.The Jade Dragon Snow Mountain Tourism Development Administrative Committee,Lijiang,674100,china 5.department of geography and tourism BinZhou university,Binzhou,256600,china)

Aerosol samples were collected at 4706m a.s.l from ablation zone of Baishui glacier No.1,***,from May to June,*** concentration of Cl-,NO3-,SO42-,Na+,k+,Mg2+,and Ca2+ was determined by *** average aerosol loading is 25.45neq scm-1,NO3-and Na+ are the dominant soluble ions in the aerosol,accounting for 39%and 21%of total average aerosol loading *** circulation reduces the concentration of ions except Cl-,Ca2+ and k+,and the concentration of Ca2+ has a good relationship with relative *** of NO3-is attributed to motor exhaust emissions and their photochemical production,although the concentration of NO3-is affected by south Asia human activities *** correlation coefficients between soluble species suggest Cl-,Na+ and k+ come from sea salt aerosol,and SO42-,Mg2+ and Ca2+ is from regional *** addition,under the influence of developing tourism,the concentration of NO3-is higher than reported measurements in southwest monsoon regions,but the concentration of SO42-is lower.

关键词： Aerosol Lijiang Mt.Yulong Temperate glacier

小江流域风化物的水理特征差异规律的实验研究

在线全文

cnki会议

学校读者我要写书评

暂无评论

水土保持通报 2008年第6期28卷 20-27页

作者：张继韦方强于苏俊谢贤健四川省地质矿产勘查开发局成都水文地质工程地质队四川成都610072 中国科学院水利部成都山地灾害与环境研究所四川成都610041 中国科学院山地灾害与地表过程重点实验室四川成都610041 西南交通大学环境工程学院四川成都610031 内江师范学院四川内江641112

水理性质是风化土体对降雨过程中入渗水的响应性质,对泥石流起动有着重要影响。以中国泥石流最为发育的小江流域为研究区,采集流域上、中、下游5个流域,9种类型岩石的19个风化物样品及5个典型泥石流沟的泥石流堆积样品,通过液塑限及渗... 详细信息

水理性质是风化土体对降雨过程中入渗水的响应性质,对泥石流起动有着重要影响。以中国泥石流最为发育的小江流域为研究区,采集流域上、中、下游5个流域,9种类型岩石的19个风化物样品及5个典型泥石流沟的泥石流堆积样品,通过液塑限及渗透实验获取水理特征参数。选择塑限、塑性指数及渗透系数等3个指标构建指标体系,系统分析了不同岩性各指标的差异规律。结果表明,对于各项指标,各岩性风化物均差异显著,且随指标不同,其水理特征差异规律显著不同。5个典型流域泥石流堆积物在各项水理特征指标上均具有较好的一致性。塑限、塑性指数及渗透系数所构建的指标体系能较为客观、系统、合理地反映各风化产物的水理性质,可为泥石流对岩性的敏感性研究提供帮助。

关键词：岩性风化物水理特征实验研究小江流域

在线全文

学校读者我要写书评

暂无评论

河口表层沉积物中磷酸盐释放的动力学特征

海洋地质前沿 2012年第3期28卷 1-6页

作者：张健郑西来董慧李琴中国海洋大学环境科学与工程学院青岛266100 中国海洋大学海洋环境与生态教育部重点实验室青岛266100

研究与探讨了胶州湾李村河河口区3个采样点表层沉积物中磷酸盐释放行为及盐度、温度、波浪强度、悬浮物浓度对磷酸盐释放动力学过程的影响。认为磷酸盐释放的动力学过程大致可分为3个阶段:①0～1h快速释放阶段;②1～8h缓慢释放阶段;③8... 详细信息

研究与探讨了胶州湾李村河河口区3个采样点表层沉积物中磷酸盐释放行为及盐度、温度、波浪强度、悬浮物浓度对磷酸盐释放动力学过程的影响。认为磷酸盐释放的动力学过程大致可分为3个阶段:①0～1h快速释放阶段;②1～8h缓慢释放阶段;③8h之后的平衡阶段。盐度升高可以促进磷酸盐释放,当盐度从0升高到10时,磷酸盐释放量增幅最大,说明磷酸盐释放对水相盐度的突变有较强的敏感性。温度升高有利于磷酸盐释放,在低温(20℃)条件下磷酸盐释放的过程有明显差异;温度较低时快速释放速率与缓慢释放速率相当,而温度较高时快速释放速率是缓慢释放速率的10倍。波浪强度对磷酸盐释放过程的影响与温度类似,当沉积物处于充分悬浮状态时,磷酸盐释放量会有大幅度提高;当悬浮物浓度降低时,快速释放速率与缓慢释放速率都有大幅度提高,释放总量也显著增加。

关键词：河口沉积物磷酸盐释放动力学

Estimating compositions of natural ringwoodite in the heavily shocked Grove Mountains 052049 meteorite from Raman spectra

在线全文

学校读者我要写书评

暂无评论

Estimating compositions of natural ringwoodite in the heavil...

中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： L.Feng,~(1,2) Y.Lin,~(1,*) S.Hu,~(1,2) L.Xu,~3 and B.Miao~4 1 key laboratory of the Earth’s Deep Interior,Institute of geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,china 2 Graduate School of Chinese Academy of Sciences,Beijing 100118,china 3 National Astronomical Observatory,Chinese Academy of Sciences,Beijing 100029,china 4 Department of Resources and environmental Engineering,Guilin university of Technology,Guilin 541004,china

A combined Raman spectroscopy and electron probe microanalysis study of the heavily shocked Grove Mountains(GRV) 052049 meteorite revealed the largest chemical fractionation of natural ringwoodite,and composition-dependent variation of the intensities and/or wavenumbers of Raman *** Fa content[atomic ratio of Fe/(Fe+Mg)]of ringwoodite varying from 27.8 to 81.6 mol%, the peak position of the single band around 290 cm(SB1),which relates to the SiO translation mode,shifts from 296.0 to 284.6 cm,and one of the doublets around 790 cm(DB1),which relates to the symmetric stretching of SiO,shifts from 796.3 to 782.7 *** addition,the relative intensities of SB1 and the other band of the doublet around 840 cm(DB2),which relates to asymmetric stretching of SiO,increases with Fa *** on the paired Raman-EPMA data,single-peak and two-peak calibrations were established,which can be used to derive Fa contents of ringwoodite from the Raman *** accuracy of Raman-derived Fa content of ringwoodite is better than±5 mol%.The correlation of SBl intensity with the Fa content of ringwoodite suggests that the vibration of SBl is enhanced with the substitution of Mg by *** correlation between Raman spectra and the chemical composition of ringwoodite have potential applications in on-line measurement of high-pressure experiments and in situ mineralogical determination in future planetary explorations.

关键词： Raman spectroscopy ringwoodite chemical compositions shocked meteorite

在线全文

cnki会议

学校读者我要写书评

暂无评论

植硅石研究在考古及古环境解释中的应用

上海地质 2002年第1期 15-18页

作者：张玉兰张敏斌华棣同济大学海洋地质与地球物理系华东师范大学河口海岸国家重点实验室上海200062

植硅石研究在我国是近二、三十年才开展起来的一门研究古气候、古环境的新兴的边缘学科,国外开展较早,且广泛地应用于考古及古气候和古环境的解释中。我国虽起步较晚,已在考古学及植物起源、古环境解释中已取得可喜成果。由于我国历... 详细信息

植硅石研究在我国是近二、三十年才开展起来的一门研究古气候、古环境的新兴的边缘学科,国外开展较早,且广泛地应用于考古及古气候和古环境的解释中。我国虽起步较晚,已在考古学及植物起源、古环境解释中已取得可喜成果。由于我国历史悠久,考古遗址很多,加之幅员辽阔,具各种植被类型的土壤,研究领域广阔,所以我国将在国际植硅石研究中发挥非常重要的作用。

关键词：植硅石考古古气候古环境植物起源古人类遗址环境变迁

Characteristics of indoor and outdoor black carbon aerosol during winter and summer in rural area of Guanzhong Plain

在线全文

学校读者我要写书评

暂无评论

Characteristics of indoor and outdoor black carbon aerosol d...

第十届全国气溶胶会议暨第六届海峡两岸气溶胶技术研讨会

作者： Zhu Chongshu1,2 Cao Junji1,Shen Zhen Xing3,Liu Sui Xin1,2(1.State key Lab of Loess & Quaternary geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an,Shanxi 710075,china 2.Graduate School of the Chinese Academy of Sciences,Beijing 100039,china 3.Department of environmental Science and Engineering,Xi’an Jiaotong university,Xi’an,china.)

Black Carbon（BC） were measured continuously in rural area of Guanzhong Plain during winter and *** concentrations of BC varied acutely over a range of 3.9-25.6 μg m-3 for outdoor and 4.8-24.7 μg m-3 for indoor in daily mean concentration,with the overall average values of 14.6 μg m-3 and 14.4 μg m-3 for outdoor and indoor in winter,*** mean BC concentrations varied over a range of 2.9-9.9μg m-3 for outdoor and 4.7-10.2μg m-3 for indoor,with the overall average value of 6.0 μg m-3 and 7.2 μg m-3 for outdoor and indoor,respectively in *** results shows the concentrations of black carbon is high in the rural area,especially in winter,which is probably due to the local biomass burning for warming and *** rural area of Guanzhong Plain,Obviously diurnal variation of BC was observed,with the hourly average concentrations ascending to its peaks twice a day in the morning and at the *** frequency distributions of BC concentrations in both indoor and outdoor environments showed a similar *** indoor environment,it was found that the BC concentrations were distributed over the high spectrum of concentrations than that for outdoor *** relationships between indoor and outdoor concentrations（separately for LT,WN and HX sites） of BC were discussed,which showed a good correlation between indoor and outdoor air of the three *** results suggest that indoor black carbon was derived at least in part from outdoor air.

关键词： Black carbon rural area Guanzhong Plain

Magnetic polarity ages of the fossil-bearing strata at the Sihetun section,West Liaoning:A preliminary result

在线全文

cnki会议

学校读者我要写书评

暂无评论

Magnetic polarity ages of the fossil-bearing strata at the S...

中国科学院地质与地球物理研究所2001学术年会

作者： PAN Yongxin~1,ZHU Rixiang~1,John Shaw~2 & ZHOU Yaoxiu~3 1.Institute of geology and Geophysics,Chinese Academy of Sciences, Beijing 100101,china 2.Geomagnetism laboratory,university of Liverpool,Liverpool L69 7ZE,UK 3.The Aviatic Remote Sensing Center,ministry of Land and Resources, Beijing 100083,china

Rock-magnetic and palaeomagnetic studies have been carried out on the interval of famous fossil -bearing sedimentary rocks and its overlying basalts and underlying basalts at the Sihetun section,West Liaoning *** polarity was obtained for the sedimentary interval and the underlying basalts,while reversed polarity was found in the overlying *** account of the new Ar/(39)Ar ages(Swisher et al.,1999),we classified the fossil-bearing sedimentary interval into the Barremian M3n zone(Early Cretaceous age).Several abnormal horizons on magnetic properties,probably corresponding to the tuffs, were observed in the fossil-bearing sedimentary interval. This implies that the massive bio-extinction may link to dramatic environmental changes that were caused by volcanic eruptions.

关键词： magnetic polarity age Jehol fauna Sihetun section

在线全文

cnki会议

学校读者我要写书评

暂无评论

地下水水位时间序列中的混沌特征

水文地质工程地质 2004年第1期31卷 14-18页

作者：宋宇陈家军孙雄北京师范大学环境科学研究所环境模拟与污染控制国家重点联合实验室北京100875 国家地震局北京100036

利用相空间重构技术、G -P算法以及Wolf提出的从单变量中提取Lyapunov指数的方法 ,分别计算了太原盆地 4组地下水水位时间序列的关联维数和Lyapunov指数。结果揭示在自然状态下 ,太原盆地某些孔隙潜水和孔隙承压水水位变化存在明显的混... 详细信息

利用相空间重构技术、G -P算法以及Wolf提出的从单变量中提取Lyapunov指数的方法 ,分别计算了太原盆地 4组地下水水位时间序列的关联维数和Lyapunov指数。结果揭示在自然状态下 ,太原盆地某些孔隙潜水和孔隙承压水水位变化存在明显的混沌特征。这不仅为以后建立水位预测模型提供了理论依据 ,并且也为运用分形理论研究地质参数的时空变异性以及含水层结构的自相似性提供了进一步的支持。

关键词：地下水时间序列水位混沌功率谱相空间重构关联维数