绳索取心特采器在破碎蚀变岩型金矿勘探中的应用     

辜文润  李春华 《地质与勘探》1989,25(11):63-64

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全球变化：地理研究的若干概念和问题：（苏联—美国研究计划的一些结果）     

Math.  JR 李世玢 《地理译报》1991,(1):1-4

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喜马拉雅东部主边界冲断层的微震和现代构造模型     

Kaya.  JR 《地震地质译丛》1994,16(2):53-56

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山东惠民凹陷中央隆起带古近系沙三段层序地层及沉积演化?   总被引：15，自引：5，他引：15       下载免费PDF全文

操应长  姜在兴  李春华  全升吉 《古地理学报》2002,4(3):40-46

根据山东惠民盆地中央隆起带古近系沙河街组第三段层序地层学研究，根据层序中湖平面变化特点和相应的沉积物特征，提出了陆相湖盆中层序内体系域的四分法，一个完整的层序由低位、湖侵、高位和下降四个体系域组成，并且层序界面位于湖平面最大下降的位置，介于下降域和低位域之间。层序地层中存在四个关键性界面：首泛面、最大湖泛面、始降面和最大下降面，其中首泛面对应于湖水由相对稳定到快速上升时的初始湖泛面，为低位域与湖侵域间的分界面；最大湖泛面对应于湖水快速上涨至最大限度时的湖泛面，为湖侵域与高位域间的分界面，在界面附近多形成特征的CS段；始降面对应于湖平面开始快速下降时的沉积界面，为高位域与下降域的分界面；最大下降面也是层序界面，为湖盆水体快速下降或湖盆岸线快速退到最低点时的沉积界面。结合研究区的岩芯、录井、测井、地震等资料综合分析，本文总结了四个关键面的识别标志。中央隆起带沙三段沉积共划分出六个体系域，分属三个层序。本文以层序II沉积为例，阐述了不同体系域的沉积体系特征，低位期湖盆水域面积小，河流-三角洲沉积体系发育，河流流经距离长，边缘地区形成似下切谷沉积；湖侵期发育小规模的退积式三角洲沉积，砂体较不发育；高位期湖盆水域面积大，砂体以深水浊积砂体为特征；下降期多发育进积式砂体，砂体发育。因此，位于层序界面之下的下降域和之上的低位域是湖盆砂体有利发育期，湖侵域和高位域是生油岩主要形成时期。  相似文献   

地热井结垢中与成热液金—银沉积作用类似...     

克拉.  JR  张新安 《国土资源信息化》1991,(21):25-28

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通用机助市图系统的地图语言工具     

Rami.  JR 黄洁 《地图》1992,(4):41-45

通过摄影测量方式生产数字地形图，现已得到了制图界的广泛接受。作为生产地形图的第三代数字制图系统（DMS）投放市场已经两年多了，其中之一就是通用计算机辅助制图系统（UCAMS）。UCAMS的理论基础是地图语言。象任何其他语言一样，地图语言有两项基本内容：字母系统和语法，本文讨论的是生产数字地形图开发的地图，并介绍地图字母和地图语法，以及地图语言工具的实例。  相似文献   

Geographical distribution and accumulation features of organochlorine residues in bivalves from coastal areas of South Korea   总被引：26，自引：0，他引：26  

Kim SK  Oh JR  Shim WJ  Lee DH  Yim UH  Hong SH  Shin YB  Lee DS 《Marine pollution bulletin》2002,45(1-12):268-279

As a part of Mussel Watch Program in Korea, the contamination levels and accumulation features of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) were assessed for 82 bivalve samples collected from 66 sites along the entire coast of Korea. The dry weight based ∑PCBs and ∑OCPs ranged from 4.4 ng g⁻¹ to 422.0 ng g⁻¹ (geometric MEAN=36.9 ng g⁻¹) and from 9.95 ng g⁻¹ to 131.37 (34.88) ng g⁻¹, respectively. PCB was predominant in Korean coast, followed by DDTs, HCHs, and Chlordanes. From the observed log normal distribution of PCB and each OCP, low- and high-levels were defined as geometric mean ±1 S.D., respectively. The levels at the sites near urban and/or industrial areas often exceeded the high-levels and the spatial distributions of ∑DDTs and ∑CHLs were correlated with that of ∑PCBs, indicating terrestrial input pathways. Even distribution of ∑HCHs suggested a possibility of atmospheric input pathway of HCHs. The observed isomer ratios of DDTs, HCHs, and CHLs indicated that aging has occurred.  相似文献   

矿物饱和指数在确定水源地最佳勘探地段中的应用     

李春华  史杰 《中国煤田地质》1995,7(4):62-65

本文依据化学热力学理论、利用水质分析资料来确定矿物溶、沉饱和指数及编制矿物溶、沉分区图，并结合具体的地质、构造等条件、确定出水源地内最佳勘探地段。勘探实践证明此方法效果较好，值得进一步应用及推广。  相似文献   

DZ40型桩机机架配DZ60锤头的改进          下载免费PDF全文

李春华刘以波  木根芳王尧昆 《探矿工程》2007,34(7):47-48

以某工程需要为契机，通过改装DZ40型桩机机架以适应DZ60锤头施工，获得成功。对DZ40型桩机机架的改装过程进行了阐述。  相似文献   

The Rest-Frame Optical Spectrum of MS 1512-cB58     

Teplitz HI  McLean IS  Becklin EE  Figer DF  Gilbert AM  Graham JR  Larkin JE  Levenson NA  Wilcox MK 《The Astrophysical journal》2000,533(1):L65-L68

Moderate-resolution, near-IR spectroscopy of MS 1512-cB58 is presented, obtained during commissioning of the near-infrared spectrometer (NIRSPEC) on the Keck II telescope. The strong lensing of this z=2.72 galaxy by the foreground cluster MS 1512+36 makes it the best candidate for detailed study of the rest-frame optical properties of Lyman-break galaxies. In 80 minutes of on-source integration, we have detected Halpha, [N ii] lambdalambda6583, 6548, [O i] lambda6300, He i lambda5876, [O iii] lambdalambda5007, 4959, Hbeta, Hgamma, [O ii] lambda3727, and a strong continuum signal in the range of 1.29-2.46 μm. A redshift of z=2.7290+/-0.0007 is inferred from the emission lines, in contrast to the z=2.7233 calculated from UV observations of interstellar absorption lines. Using the Balmer line ratios, we find an extinction of E(B-V) = 0.27. Using the line strengths, we infer a star formation rate (SFR) of 620+/-18 M middle dot in circle yr-1 (H0=75, q0=0.1, and Lambda=0), which is a factor of 2 higher than that measured from narrowband imaging observations of the galaxy but is a factor of almost 4 lower than the SFR inferred from the UV continuum luminosity. The width of the Balmer lines yields a mass of Mvir=1.2x1010 M middle dot in circle. We find that the oxygen abundance is 13 solar, in good agreement with other estimates of the metallicity. However, we infer a high nitrogen abundance, which may argue for the presence of an older stellar population.  相似文献