南天山萨恨托亥—大山口—带穆龙套型金矿地质及地球化学特征   总被引：1，自引：0，他引：1  

孟祥金  叶锦华  王立本 《地球学报》2000,21(4):379-388

南天山中段萨恨托亥大山口成矿带内的金矿赋存在浅变质浊积岩系碎屑岩内。本文以该带内2个典型金矿———大山口金矿和萨恨托亥金矿为例,对其成矿特征进行了初步研究。研究表明,金矿体受韧脆性剪切带控制,产状稳定,矿石类型简单,硫化物种类单一且含量较低。成矿可分为糜棱岩阶段和石英脉阶段,与控矿的韧脆性剪切带的发展演化各阶段相对应。成矿发生于中低温条件下弱酸性向中性环境过渡阶段,成矿流体是以深源流体(含岩浆热液)为主的多源混合热液(构造热液)。成矿作用为构造成岩成矿(韧性剪切带成矿),矿床成因类型为(构造)热液型金矿,  相似文献   

与钨为主的矽卡岩矿床有关的花岗岩类的结构,组成和挥发分逸度   总被引：1，自引：0，他引：1  

Keit.  JD 王立本 《国外矿床地质》1993,(3):18-28

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南里海盆地砂页岩层压实过程中的侧向流体运移     

Bred.  JD 何生 《地质科学译丛》1990,7(1):50-57

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运用三维地震资料进行油藏管理     

Robe.  JD 刘书会 《国外石油地质》1990,(1):26-33

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以小块地为基础的土地信息系统     

Mcla.  JD 张仁霖 《测绘译丛》1989,(2):14-22,13

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In situ determination of subsurface microbial enzyme kinetics     

Istok JD  Field JA  Schroth MH 《Ground water》2001,39(3):348-355

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宇宙成因^10Be在解决地学问题中的应用     

莫里.  JD  马冰 《国土资源信息化》1992,(6):33-34

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From models to performance assessment: the conceptualization problem   总被引：5，自引：0，他引：5  

Bredehoeft JD 《Ground water》2003,41(5):571-577

Today, models are ubiquitous tools for ground water analyses. The intent of this paper is to explore philosophically the role of the conceptual model in analysis. Selection of the appropriate conceptual model is an a priori decision by the analyst. Calibration is an integral part of the modeling process. Unfortunately a wrong or incomplete conceptual model can often be adequately calibrated; good calibration of a model does not ensure a correct conceptual model. Petroleum engineers have another term for calibration; they refer to it as history matching. A caveat to the idea of history matching is that we can make a prediction with some confidence equal to the period of the history match. In other words, if we have matched a 10-year history, we can predict for 10 years with reasonable confidence; beyond 10 years the confidence in the prediction diminishes rapidly. The same rule of thumb applies to ground water model analyses. Nuclear waste disposal poses a difficult problem because the time horizon, 1000 years or longer, is well beyond the possibility of the history match (or period of calibration) in the traditional analysis. Nonetheless, numerical models appear to be the tool of choice for analyzing the safety of waste facilities. Models have a well-recognized inherent uncertainty. Performance assessment, the technique for assessing the safety of nuclear waste facilities, involves an ensemble of cascading models. Performance assessment with its ensemble of models multiplies the inherent uncertainty of the single model. The closer we can approach the idea of a long history with which to match the models, even models of nuclear waste facilities, the more confidence we will have in the analysis (and the models, including performance assessment). This thesis argues for prolonged periods of observation (perhaps as long as 300 to 1000 years) before a nuclear waste facility is finally closed.  相似文献   

Relationship between structures of substituted indolic compounds and their degradation by marine anaerobic microorganisms   总被引：1，自引：0，他引：1  

Gu JD  Fan Y  Shi H 《Marine pollution bulletin》2002,45(1-12):379-384

Degradation of selected indolic compounds including indole, 1-methylindole, 2-methylindole, and 3-methylindole was assessed under methanogenic and sulfate-reducing conditions using the serum-bottle anaerobic technique and marine sediment from Victoria Harbour, Hong Kong as an inoculum. Our results showed that indole degradation was achieved in 28 days by a methanogenic consortium and 35 days by a sulfate-reducing consortium. During degradation under both conditions, two intermediates were isolated, purified and identified as oxindole and isatin (indole-2,3-dione) suggesting that both methanogenic and sulfate-reducing bacteria use an identical degradation pathway. Degradation processes followed two steps of oxidation accomplished by hydroxylation and then dehydrogenation at 2- and then 3-position sequentially prior to the cleavage of the pyrrole ring between 2- and 3-positions. However, none of 1-methylindole or 2-methylindole was degraded under any conditions. 3-Methylindole (3-methyl-1H-indole, skatole) was transformed under methanogenic conditions and mineralized only under sulfate-reducing conditions. It is clear that methyl substitution on 1- or 2-position inhibits the initial attack by hydroxylation enzymes making them more persistent in the environment and posing longer toxic impact.  相似文献   

第二届全国矿物学学术会议在青岛召开     

王立本 《地质论评》1998,44(1):76

第二届全国矿物学学术会议于1997年10月8日至13日在青岛市召开。这是继1990年在北京召开的第15届国际矿物学大会之后,我国矿物学界的又一次盛会。总计80名代表参加了这届学术会议,他们分别来自中国科学院、国家教委、地质矿产部、冶金工业部、有色金属工业总公司、化学工业部、核工业总公司、国家建材局、武警黄金指挥部等系统所属的高等院校、科研院所和产业部门。向会议提供赞助的企业集团也派代表参加了会议。会议主办单位和协办单位的领导同志和青岛市科委的领导同志参加了会议的开幕式。中国  相似文献