辽宁区域海洋经济布局机理与可持续发展研究   总被引：13，自引：2，他引：13  

张耀光  崔立军 《地理研究》2001,20(3):338-346

通过对辽宁海洋资源的评价,海洋经济发展、海洋产业部门结构和海洋产业布局特点等的分析,并根据海域资源差异、区域海洋经济结构差异、海洋产业分布状况等,划分出辽宁渤海海洋经济区和黄海海洋经济区。探讨了区域海洋经济区的形成与区域海洋经济布局机理。采用定性与定量相结合、从定性到定量的研究方法,应用层次分析法确定辽宁海洋经济区的发展方向与重点海洋产业部门,提出了辽宁区域海洋经济可持续发展的对策和措施  相似文献   

南极15ka以来海洋沉积物的环境磁学研究   总被引：4，自引：2，他引：4       下载免费PDF全文

侯红明  王保贵  汤贤赞 《极地研究》1997,9(1):37-45

通过对东南极普里兹湾陆坡区ＮＰ９５－１及西南极长城湾ＮＧ９３－１两柱样系统的环境磁学研究，获得了南极地区１５．０～５．５ｋａＢ．Ｐ．以来的古气候变化序列。结果表明，磁学参数较好地记录了古气候变化及沉积环境变化的信息。ＮＰ９５－１柱样较好地记录了Ｈｅｉｎｒｉｃｈ１事件、新仙女木事件以及波令－阿罗德暖期，其中Ｈｅｉｎｒｉｃｈ１事件发生于１４．３ｋａＢ．Ｐ．，新仙女木冷期为１１．７～１０．３ｋａＢ．Ｐ．，１０．３ｋａＢ．Ｐ．以后，南极地区进入全新世。在全新世，两柱样记录了在１０．０ｋａＢ．Ｐ．及６．０ｋａＢ．Ｐ．前后两个暖期，其间夹有小幅气温下调的时段；６．０ｋａＢ．Ｐ．后，两柱样均有气候颤动变冷的记录。  相似文献   

Primary alteration—oxidation of marine algal organic matter from oil source rocks of the North Sea and Norwegian Arctic: new findings     

Ganjavar Khavari Khorasani  Johan K. Michelsen 《Organic Geochemistry》1992,19(4-6)

The presence of partially oxidized algal organic matter in oil-prone marine source rocks, is the rule rather than the exception. Partially oxidized, algal kerogen can still act as a significant source of liquid hydrocarbons. However, the corresponding peak of C₁₂ + hydrocarbon generation is shifted to a considerably lower maturity level compared with that of the classical Type II kerogen. The extent of primary alteration-oxidation of marine algal kerogen is monitored by means of solid state microfluorescence spectroscopy. A new parameter, the Primary Alteration Factor (PAF) is established, and the relationships between PAF and H/C, O/C, HI, TOC and between PAF and %₀δ¹³C are determined. The present data show large variations in the bulk chemistry of immature marine algal kerogens, and reveal evidence for gradational dehydrogenation/oxidation of the source organic matter. This contrasts with the recently proposed mechanism for kerogen formation. SEM analysis reveals a relationship between the physical breakdown of algal organic matter and the formation of liptodetrinite. FTIR analysis shows that the incorporation of primary oxygen in the kerogen macromolecules is not in the form of carbonyl or carboxyl functionalities. The presence of highly unreactive, stable oxygen, associated with aromatic structures in partially oxidized algal kerogen, is suggested by resistance of the kerogen to graphitization. The FTIR data also suggest the presence of aryl ether oxygen. The present findings raise fundamental questions regarding the mechanisms of kerogen cracking and kerogen formation, and have important implications for petroleum exploration.  相似文献   

Generation of synthetic seismograms with layer reduction     

S. N. Bhattacharya 《Geophysical Journal International》1992,111(1):79-90

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Cyclic crustal movement, steady uplift of marine terraces, and evolution of the island arc-trench system in southwest Japan     

Toshinori Sato  Mitsuhiro Matsu'ura 《Geophysical Journal International》1992,111(3):617-629

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二叠纪海相碳酸盐的锶同位素演化及其意义   总被引：4，自引：0，他引：4  

卢武长  崔秉荃 《矿物岩石》1992,12(4):80-87

本文从沫阳和熊家场剖面二叠纪海相碳酸盐和玄武岩的锶同位素变化出发,讨论了碳酸盐的锶同位素组成与峨嵋山玄武岩喷发之间的关系,以及玄武岩中海相碳酸盐的锶同位素贫化原因,指出海相碳酸盐的锶同位素组成可作为了解地球构造演化的工具。  相似文献   

Mid-chain ketocarboxylic acids in the remote marine atmosphere: Distribution patterns and possible formation mechanisms     

Kimitaka Kawamura  R. B. Gagosian 《Journal of Atmospheric Chemistry》1990,11(1-2):107-122

In remote marine aerosol samples collected from the North Pacific ocean, Enewetak Atoll, American Samoa, and New Zealand, series of mid-chain ketocarboxylic acids in the range of C₆-C₁₈ were detected. All the positional isomers, except for the 2-oxo and 3-oxo species, were detected for major ketoacid families (e.g. C₉, C₁₁ and C₁₃). Higher ketoacid concentrations (up to 19 ng/m³) were obtained in the northern North Pacific aerosol samples, which generally showed an odd carbon-numbered predominance with 5-oxoundecanoic acid being the major species. By contrast, lower concentrations were obtained in the lower-latitude or subtropical aerosol samples, where even carbon-numbered ketoacids were relatively abundant.The distribution patterns of the odd carbon-numbered ketoacids could not be explained by the primary emissions from source materials including terrestrial higher plants, soil particles, and ocean surfaces. We consider that the isomeric ketocarboxylic acids are produced in the atmosphere by the photochemical oxidation of semi-volatile monocarboxylic acids, which are counterparts of the oxidative degradation of unsaturated fatty acids emitted from seawater surfaces. Atmospheric production of the ketoacids is seemingly enhanced in the northern North Pacific, probably due to an enhanced primary productivity.  相似文献   

地质力学在塔里木盆地找油工作中的应用——纪念李四光教授诞生100周年   总被引：1，自引：0，他引：1  

康玉柱 《新疆地质》1990,(1)

运用李四光教授所创立的地质力学理论和方法,对塔里木盆地进行了石油地质研究和油气勘查工作.①系统地研究了塔里木盆地的成生发展历史及构造体系的划分;②运用地质力学理论和方法,对确定含油气区—选择油气富集带—寻找油气田—评价油气田全过程进行实践,并取得重大突破,进一步证实沙雅隆起是一个油气富集带;③首次实现了我国古生代海相油气田的重大突破;④初步总结了构造体系控油的几点规律.  相似文献   

A method for estimating microporosity of fine‐grained sediments and sedimentary rocks via scanning electron microscope image analysis          下载免费PDF全文

Michael Nole  Hugh Daigle  Kitty L. Milliken  Maša Prodanović 《Sedimentology》2016,63(6):1507-1521

This study presents a method of two‐dimensional scanning electron microscope image analysis that directly quantifies microporosity abundance in clay‐rich, fine‐grained sediments. The method is novel in that it is specifically designed to circumvent the challenge to porosity quantification posed by mineral surface charging and topographical artifacts created during Ar‐ion cross‐section polishing. It utilizes the finding that differences in circularity values can be used to distinguish micropores from blemishes in a thresholded image. This method is powerful because it is fast and provides a direct microporosity estimation technique to augment or replace experimental data. The pore size range to which the method is applicable is clear and can be selected depending on the application of the analysis. When used appropriately, the method can be implemented on microporous sediments and sedimentary rock in general. The method is developed using marine muds of Pliocene and Miocene ages from the Nankai margin (burial depths from approximately 200 to 1100 m). The close match between imaging‐derived microporosity and bulk N₂ microporosity measurements shows that porosity in these young and relatively shallowly buried sediments is dominated by pores of sizes that can be imaged by scanning electron microscopy. In Kumano, forearc basin sediments of the Nankai Trough, results of this method show a significant increase in microporosity with burial depth, probably due to microporosity preservation during compaction and possibly early volcanic ash diagenesis.  相似文献   

AMS~(14)C测年揭示的渤海湾沿海低地第Ⅱ海相层年龄(Ⅱ)   总被引：1，自引：0，他引：1  

商志文  王福  李建芬  姜兴钰  陈永胜  王宏 《地质通报》2016,35(10):1607-1613

在初步获得渤海湾海河南部沿海低地第Ⅱ海相层年龄大于43.5ka BP的基础上,在沧州北部和海河北部的沿海低地又利用6个新的机械钻孔岩心,建立了2条垂直于现代岸线的长剖面。根据沉积物岩性和有孔虫查明了第Ⅱ海侵层在剖面中的空间分布,并获得一组新的AMS~(14)C年龄数据。结果显示,在第Ⅱ海相层中新获得的9个AMS~(14)C年龄同样均大于43.5ka BP。至此,渤海湾3条垂直现代岸线剖面10个钻孔的第Ⅱ海相层的21个AMS~(14)C年龄均大于43.5ka BP,进一步证实了普遍发育于渤海湾沿海低地的第Ⅱ海相层形成于MIS 3阶段早期或MIS 5阶段,而不是前人认为的23~39ka BP。  相似文献