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JGS-1B型综合测井仪可进行磁三分量测井、工程测井、水文测井及煤田测井,本文主要介绍了该仪器在铁矿勘查中的实际应用。 相似文献
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介绍了伽马总量测井探管的工作原理、研制方案、电子电路设计、校准方法等。研制了HD-4002型综合测井仪的伽马总量测井探管,测量范围:(0~5)%e U;准确性:在(0.01~5)%e U范围内测量误差≤±5%;灵敏度:约为295(0.01%e U·s)-1;铀含量灵敏度系数:(30.1±0.8)n C/(kg·h·0.01%e U),可用于铀含量的定量测量。所研制的伽马总量测井探管性能稳定、可靠,灵敏度高,符合铀矿地质行业伽马测井规范的要求,并已应用于铀矿勘查测井工作中。 相似文献
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地下物探是地球物理方法在钻孔和坑道中应用的总称。在钻孔中按其工作方式和探测范围的不同,又可分测井和井中物探两大类。测井的探测范围为几厘米至几十厘米级,主要用来解决井壁地质问题。地质矿产部的测井工作已有卅年历史,目前已能基本满足地质勘探的需要。●在测井仪器装备方面,除原有的JDC—2型(上海地质仪器厂造)和JBC—2型(重庆地质仪器厂造)轻便全自动测井系统外,近年,还由上海地质仪器厂生产了JH—1型综合测井站,使仪器装备实现了车装、配套,小口径化(井下仪直径一般不大于40毫米)。它们适用于煤田、铀矿、水文、 相似文献
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(一) 应核工业北京地质研究院邀请,俄罗斯共和国著名物探专家A.C.谢雷赫于1992年12月11日来华讲学,历时1个月。A.C.谢雷赫是中国人民的老朋友,早在50年代就在我国初建的航测队(湖南、江西等)工作过。他讲学的主要题目有:铀矿勘查中的物探科研工作;铀矿床的普查分类;物探方法有效评价;主要铀矿类型(内生矿床、层状氧化带矿床、高品位富矿等)的物理-地质模式;测井工作方法和仪器;放射性方法勘查非放射性矿, 相似文献
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中国地质调查局天津地质调查中心于2013年9月3-4日在天津召开了“全国砂岩型铀矿远景调查工作部署研讨会”,天津地质调查中心主任金若时和中国地质调查局资源部主任薛迎喜主持会议,国土资源部副部长汪民,天津市副市长尹海林,中国科学院、中国工程院多位院士,中国地质调查局相关领导,多位知名学者和来自全国各地60余家铀矿科研、勘查单位的代表出席了会议。会议全面总结了铀矿勘查战略选区工作进展及找矿阶段成果,研究部署了下一步全国砂岩型铀矿的勘查工作。 相似文献
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花岗伟晶岩型铀矿床是一种重要的铀矿化类型,其矿化层严格受到花岗伟晶岩脉控制,矿化层围岩为片岩、片麻岩和混合岩等。花岗伟晶岩脉由硅质物肢结,坚硬质密,不透水,其测井结果表现为高电阻和高自然伽玛特征。而其围岩片岩、片麻岩和混合岩层理和解理非常发育,并富含层间水,测井结果表现为低自然伽玛、低电阻和低自然电位异常特征。花岗伟晶岩型铀矿含矿层与其围岩物性差异较大,利用地球物理测井参数的差异来评价岩矿层和铀成矿规律显然是一种较好的铀矿勘查工作方法。FD--3019伽玛定量测井是铀矿钻探勘查定量解释必不可少的一项基本测井工作;2007年以前花岗伟晶岩型铀矿钻探勘查没有尝试用电阻率、自然电位等综合测井参数评价预测铀矿化情况,实践结果证明通过综合测井曲线解释能够更准确的预测花岗伟晶岩脉的展布规律,科学划分钻孔地质剖面,为花岗伟晶岩型铀矿勘查评价和预测提供可靠依据,并且及时准确的指导野外生产和钻探设计工作。 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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Inter-regional correlation of transgressions and regressions in the Cretaceous period 总被引:1,自引:0,他引:1
T. Matsumoto 《Cretaceous Research》1980,1(4):359-373
Well investigated platforms have been selected in each continent, and the history of Cretaceous transgressions and regressions there is concisely reviewed from the available evidence. The factual records have been summarized into a diagram and the timing of the events correlated between distant as well as adjoining areas.On a global scale, major transgressions were stepwise enlarged in space and time from the Neocomian, via Aptian-Albian, to the Late Cretaceous, and the post-Cretaceous regression was very remarkable. Minor cycles of transgression-regression were not always synchronous between different areas. Some of them were, however, nearly synchronous between the areas facing the same ocean.Tectono-eustasy may have been the main cause of the phenomena of transgression-regression, but certain kinds of other tectonic movements which affected even the so-called stable platforms were also responsible for the phenomena. The combined effects of various causes may have been unusual in the Cretaceous, since it was a period of global tectonic activity. The slowing down of this activity followed by readjustments may have been the cause of the global regression at the end of the Cretaceous. 相似文献
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The Afyon stratovolcano exhibits lamprophyric rocks, emplaced as hydrovolcanic products, aphanitic lava flows and dyke intrusions, during the final stages of volcanic activity. Most of the Afyon volcanics belong to the silica-saturated alkaline suite, as potassic trachyandesites and trachytes, while the products of the latest activity are lamproitic lamprophyres (jumillite, orendite, verite, fitztroyite) and alkaline lamprophyres (campto-sannaite, sannaite, hyalo-monchiquite, analcime–monchiquite). Afyon lamprophyres exhibit LILE and Zr enrichments, related to mantle metasomatism. 相似文献
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正20140751 Guo Xincheng(Geological Party,BGMRED of Xinjiang,Changji 831100,China);Zheng Yuzhuang Determination and Geological Significance of the Mesoarchean Craton in Western Kunlun Mountains,Xinjiang,China(Geological Review,ISSN0371-5736,CN11-1952/P,59(3),2013,p.401-412,8 相似文献
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正20141058 Chen Ling(Key Laboratory of Mathematical Geology of Sichuan Province,Chengdu University of Technology,Chengdu610059,China);Guo Ke Study of Geochemical Ore-Forming Anomaly Identification Based on the Theory of Blind Source Separation(Geosci- 相似文献
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正20141334 Chen Kun(Institute of Geophysics,China Earthquake Administration,Beijing100081,China);Yu Yanxiang Shakemap of Peak Ground Acceleration with Bias Correction for the Lushan,Sichuan Earthquake on April20,2013(Seismology and Geology,ISSN0253-4967,CN11-2192/P,35(3),2013,p.627-633,2 illus.,1 table,9 refs.)Key words:great earthquakes,Sichuan Province 相似文献
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正20141624 Cai Xiongfei(Key Laboratory of Geobiology and Environmental Geology,Ministry of Education,China University of Geosciences,Wuhan 430074,China);Yang Jie A Restudy of the Upper Sinian Zhengmuguan and Tuerkeng Formations in the Helan Mountains(Journal of Stratigraphy,ISSN0253-4959CN32-1187/P,37(3),2013,p.377-386,5 illus.,2 tables,10 refs.) 相似文献
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正20142263Lü Shaojun(Geological Survey of Jiangxi Province,Nanchang 330030,China)Early-Middle Permian Biostratigraphical Characteristics in Qiangduo Area,Tibet(Resources SurveyEnvironment,ISSN1671-4814,CN32-1640/N,34(4),2013,p.221-227,2illus.,2tables,22refs.)Key words:biostratigraphy,Lower Permian,Middle Permian,Tibet 相似文献
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正20142560Hu Hongxia(Regional Geological and Mineral Resources Survey of Jilin Province,Changchun 130022,China);Dai Lixia Application of GIS Map Projection Transformation in Geological Work(Jilin Geology,ISSN1001-2427,CN22-1099/P,32(4),2013,p.160-163,4illus.,2refs.) 相似文献
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正20140692 Duo Tianhui(No.402 Geological Team,Exploration of Geology and Mineral Resources of Sichuan Authority,Chengdu611730,China);Wang Yongli Computer Simulation of Neptunium Existing Forms in the Groundwater(Computing Techniques for Geophysical and Geochemical Exploration,ISSN1001-1749,CN51-1242/P,35(3), 相似文献