显微荧光光度术在烃源岩有机岩石学研究中的应用     

李贤庆  钟宁宁 《地质科技情报》1998,17(4):91-97

在简要介绍显微荧光光度术的基础上,着重阐述其在烃源岩显微组分特征,有机质热演化,有机质类型,烃类生成与运移,以及富氢显微组分生烃机理等方面的研究进展,充分展现了其在烃源岩研究与评价中具有良好的应用价值。  相似文献   

Organic/ Inorganic Occurrence of Metallic Elements of the Black Shale-Hosted Baiguoyuan Silver-Vanadium Deposit in Xingshan, Hubei     

ZHUANG Hanping  LU Jialan  FU Jiamo  LIU Jinzhong Guangzhou Institute of Geochemistry  Chinese Academy of Sciences  Guangzhou REN Chigang  ZOU Degang The nd Department of Physics  Fudan University  Shanghai  TIAN Weizhi Chinese Academy of Atomic Science  Beijing 《《地质学报》英文版》1998,72(3):299-307

By means of kerogen purification, the proton induced X-ray emission (PIXE) and instrumental neutron activation analysis (INAA), the authors have studied the organic/inorganic occurrence modes of the metallic elements of the Baiguoyuan silver-vanadium deposit hosted in black shale in Hubei Province, China. The result shows that Au, Hg and Ta have a strong tendency to occur organically, with more than 70% of these elements being associated organically. Se, Ga, Ag and Hf are partly associated with organic matter, with more than 20% of them occurring organically. Compared with the above elements, Zn, Cu, As and Sb are weakly associated organically, and tend to be enriched in kerogen. However, Mn, Th, U, V, Co, Cr, Al, Fe and Sc usually occur inorganically. Of the rare earth elements (REE), La, Ce, Tb, Dy, Yb and Lu have stronger ability to be associated with organic matter than Sm and Eu.  相似文献   

Types of Organic Facies and Source Rock Assessment of the Coal-Measure Mudstone in the Turpan-Hami Basin     

ZHAO Changyi  DU Meili  SHAO Longyi  CHEN Jianping  CHENG Keming  HE Zhonghua 《《地质学报》英文版》1998,72(2):169-179

Abstract: 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.  相似文献   

Determination of Platinum-Group Elements and Gold in Two Russian Candidate Reference Materials SCHS-1 and SLg-1 by ICP-MS after Nickel Sulfide Fire Assay Preconcentration   总被引：1，自引：0，他引：1  

Chunsheng Li  Chifang Chai  Xiaolin Li  Xueying Mao 《Geostandards and Geoanalytical Research》1998,22(2):195-197

  相似文献   

Land degradation is not a necessary outcome of communal pastoralism in arid Namibia   总被引：1，自引：0，他引：1  

David Ward    Ben T. Ngairorue  Johannes Kathena  Rana Samuels  Yanay Ofran 《Journal of Arid Environments》1998,40(4):357-371

In Otjimbingwe, a region of arid south-central Namibia, human population densities are high and these communal pastoralists own large numbers of livestock. Such situations are commonly perceived to lead to the ‘tragedy of the commons'. This region lends itself to a comparison of the effects of communal and commercial farming (with private land ownership) because the communal area is completely surrounded by commercial farms. In spite of far higher stocking densities on the communal areas and the absence of an overall grazing strategy, we found no evidence of the ‘tragedy of the commons' on Otjimbingwe. Indeed, the communal areas did not differ in a number of soil and vegetation parameters from the commercial farms. These results point both to the resilience of arid environments to high stocking levels and the over-riding influence of abiotic variables on environmental quality.  相似文献   

大气有机污染分析和评价：Ⅲ.美国迈阿密市大气有机污染监测与分析   总被引：1，自引：1，他引：1  

郎庆勇 Jaffe  R 《岩矿测试》1997,16(2):118-127

自１９９４年６月至１９９５年３月对（美）迈阿密市大气颗粒物及干、湿沉降物中的多种有机化合物进行了定量分析与监测，并依据分析结果结合分子参数对有机污染水平的季节性变化、气候条件影响和清除机理等进行了探讨。  相似文献   

湖南西北部黑色岩系中的贵金属矿化   总被引：13，自引：0，他引：13  

鲍振襄 《矿物岩石》1997,17(2):70-77

湖南西北部寒武系下统木昌组黑色岩系中蕴藏着丰富的镍钼钒多金属矿床及其伴生的贵金属矿化。可划分为２类岩性序列，分别赋存着镍钼－金银矿化和钒－银矿化。有机成矿作用对该类矿床（化）的形成起了主导作用。本区具有潜在的贵金属矿化的找矿前景  相似文献   

中下扬子二叠纪礁碳酸盐岩成岩作用,孔隙演化及油气评价     

沈安江  陈子料 《地质论评》1997,43(1):91-100,T002

本文提出了中下扬子二叠纪礁碳酸盐岩主要作用类型有造礁作用，白云石化作用，胶结作用，溶解作用及裂隙作用，经历了海水，混合水，大气淡水及埋藏成岩环境，按下列序列演化，造礁作用－海水胶结作用－蒸发海水白云石化－淡水渗流带淋溶及潜流带胶结作用一混合水白云石化－浅埋Ｉ胶结，白云化及溶解作用（Ｔ１／Ｐ２）的多期交替－深埋藏胶结（含Ｊ３／Ｊ２古表生构造岩溶作用）一深埋藏溶解－深埋藏白云石化－浅埋藏ＩＩ及表生淋溶  相似文献   

Longitudinal and temporal patterns of benthic coarse particulate organic matter in the Agüera stream (northern Spain)     

Esther González  Jesús Pozo 《Aquatic Sciences - Research Across Boundaries》1996,58(4):355-366

Benthic coarse particulate organic matter (CPOM) was studied between November 92 and December 93 at four sites along the longitudinal gradient of the Agüera stream system (Northern Spain). CPOM was sorted in four main categories: leaves (several species), fruits and seeds, twigs and debris. Headwater site showed higher densities of total CPOM, leaves and twigs than downstream reaches, but no regular longitudinal pattern of change was noticed. The ranges of mean CPOM standing stock at the sampling sites were 20.5–74.1 g AFDW m^–2 (site B), 9.9–47.7 g AFDW m^–2 (site 5), 4.3–21.4g AFDW m^–2 (site 7) and 9.8–37.9 g AFDW m^–2 (site 9). The particulate matter at downstream sites was in a more advanced stage of breakdown probably as a result of processing and transport from upstream reaches. Leaves species composition of benthic CPOM clearly reflected the type of riparian vegetation at each site. The timing of inputs and the hydrologic regime appeared to act together influencing temporal dynamics of benthic CPOM. A gradual temporal change in species composition of benthic leaf litter was observed under natural mature deciduous forest: first alder, later chestnut and finally oak.  相似文献   

微细浸染型（卡林型）金矿成矿过程中碳和有机质的作用   总被引：10，自引：2，他引：10  

李九玲  亓锋  徐庆生 《矿床地质》1996,15(3):193-206

在众多关于黔滇桂微细浸染型（卡林型）金矿研究成果的基础上，本文通过本类型金矿含碳及有机质的特征；金能形成金属有机化合物及原子簇化合物的特征的研究。提出金以金属有机化合物形式在本区上二叠统富含生物成因有机质的煤系地层中形成预富集；在区域热变质作用中，金以气相金属有机化合物方式向上运移，蓄积在上二叠统至中三叠统各层位的背斜和穹隆部位；动力变质带的断裂活动引起物理化学突变，使金的气相金属有机化合物在构造断裂带解体、裂化从而形成了含细分散碳质的微细浸染型含金硫化物原生矿化；并探讨了主成矿期后与有机质解体有关的叠加热液活动和表生氧化作用对原生矿化的改造。从而从有机质演化角度初步建立了此类型的成矿模式  相似文献