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《物探化探计算技术》2007,(Z1)
在这秋高气爽的金秋时节,迎来了中国地质科学院地球物理地球化学勘查研究所(简称物化探所,IGGE)建所50周年华诞,值此喜庆之际,物化探所广大科技工作者和国内特约学者共同撰写论文,回顾物化探所50年的科技发展历程,总结交流近年来物化探方法技术研究与开发,以及资源勘查与评价、农业与生态环境调查与评价、工程勘查、地质灾害调查与预警等领域的最新成果,展望物化探的发展方向,为建所50周年献上一份厚礼。50年栉风沐雨,50年春华秋实。经过物化探所几代人的奋力拼搏,努力探索,使物化探所从建所之初地质部物化探局下属的小型实验室,发展成为人材荟萃、装备精良、方法技术齐全、学术地位举足轻重、享誉国内外的物化探研究所。其间,尤其在斜磁化理论的提出与普及,激发极化法的研究与推广,航空物探技术的研发与应用,高温超导技术在地学中的应用研究,全国1∶20万区域化探扫面方法的提出与标准的制定,区域与矿区化探方法的研究与推广,地球化学系列标准物质的研制及分析测试方法技术开发,物化探新仪器设备的研制开发和计算机技术在物化探中的应用研究等取得了开拓性成果,在各个不同的历史时期均发挥了重要作用。目前物化探所作为“国家级科学事业单位”和“国家现代地质... 相似文献
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本区矿体产于花岗岩体内的破碎带及花岗斑岩的凹陷部位。由于地表矿体受当地开采的破坏及第四系覆盖，对于矿体的延伸方向、走向、长度和产状、规模都不清楚。矿区自发现以来，作了大量的物化探普查工作、物化探资料也起了很大的作 相似文献
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江汉盆地中-下古生界地震勘探最主要的矛盾在于盐下层地震反射信噪比极低。开展三种野外采集方法试验,即单线高次覆盖和非纵高次覆盖、宽线高次覆盖,资料品质有明显改善;改变处理流程,可以重新处理老资料;利用物化探嵛料进行圈闭综合评价。提出谢家湾构造深部存在油气且保存较好,石炭系亦有含油气可能。多种物化探资料的综合应用,是江汉盆地中-古生界油气勘探方法的发展方向。 相似文献
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植物地球化学测量在云南热带雨林区的初步尝试及效果 总被引：8，自引：0，他引：8
(一)问题的提出目前,世界上许多国家已经使用植物地球化学找矿,特别是森林密布、冰雪覆盖以及干旱荒漠地区,这种方法越来越明显地显示出它独特的优越性。在苏联、美国、印度、芬兰等许多国家,对不同景观条件的不同矿种已有成功的测量实例。我国新疆物化探队和地矿部物化探所在西北干旱荒漠地区进行的植物测量试验,也取得了比较理想的效果。西双版纳热带雨林区气候湿热、雨量充沛、植被极其发育,景观条件特殊。据统计,在西双版纳1万多平方千米面积内生长的种子植物、蕨类植物和栽培植物就有5000种左右。高 相似文献
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Brian L. Gulson 《Journal of Geochemical Exploration》1984,22(1-3)
An assessment is made of the use of lead isotopes in soils as an exploration tool for concealed lead-rich base metal massive sulphide deposits, using four case histories in southeast Australia as examples. Case history 1 covers soil profiles (< 1 m depth) unrelated to mineralization in which the lead isotope ratios exhibit variation with depth and are different from those for massive sulphide deposits. Case history 2 covers six shallow (< 0.4 m depth) profiles from two traverses over the concealed Elura Zn-Pb-Ag deposit in central western New South Wales. For one traverse over completely concealed (blind) sulphides, no isotopic or geochemical signature of the orebody could be detected. In two profiles from the other traverse, for depths of 0.15 m and 0.3–0.45 m, the lead isotopic ratios in the soils are identical with those in the ore (the target isotope ratios). Case history 3 covers two occurrences of Silurian volcanogenic Cu-Zn-Pb mineralization at the Benambra prospect in northeast Victoria. The isotopic ratios for the soils are identical with those in the sulphides and the isotopic signature of the sulphides is also detectable in traverses where no obvious surface anomaly is developed. Case history 4 is an undrilled anomaly in Silurian shales and felsic volcanics where the isotope ratios in B horizon soils are consistent with those of the target isotopic signature.The information from these case histories suggests that the lead isotopic analysis of soils will be a useful exploration tool for concealed mineralization, although at the present stage of research it appears that its application may be limited to shallowly buried (< 100 m) targets or deeply buried targets with an extensive oxidation profile. Its main advantage over conventional geochemical techniques is its ability to discriminate between similar geochemical anomalies arising from different styles of mineralization, as illustrated by an example from Benambra. 相似文献
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二叠系芦草沟组是准噶尔盆地东部地区最重要的烃源岩层系和勘探目的层系之一。2013年中国地质调查局油气资源调查中心在准噶尔盆地南缘博格达山山前带实施的油页岩调查井JZK1井钻探过程中,发现二叠系芦草沟组重油。通过对JZK1重油和岩心样品有机地球化学的测试数据研究表明:二叠系重油原油演化程度适中,主要赋存于岩石裂缝中,且经历过后期生物降解作用;油源对比指示,原油来自于芦草沟组本身,属自生自储型油藏。据此推测西起乌鲁木齐市雅玛里克山,东至奇台的白杨沟,断续延长136 km,宽2~10 km,分布面积约2×104 km2的芦草沟组均为下步油气勘探的有利区。基于钻井和过井地震测线的解释结果,指出存在推覆体上盘和推覆体下盘两个勘探领域,且推覆体下盘的原生油藏领域埋藏深、规模大,是下步勘探重点领域。 相似文献
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The study area is located in the western part of the loess plateau of China where the climate is continental semiarid and typical loess ridges and hillocks are developed. It is a very difficult terrain for mineral exploration. Samples of drilling chips, loess and red soil, well and spring water, vegetation, and soil gas were collected. The results showed that Zn, Pb, Cu, Ag, As, Mo, Sb, Hg, S, and so forth were transported into the overburden in different ways. Efficient methods for geochemical exploration in the regions overlain by loess and red soil are established. Hydrogeochemical exploration can be used on a regional scale and soil gas and partial extractions of soil can be used for follow-up studies. 相似文献
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Detailed geochemical mapping of superficial lateritic formations is compared with recent high-resolution SPOT satellite images in the Dagadamou prospect in southern Mali.The two main landscape features standing out in SPOT images are expressed by thematic indices derived from multispectral data. They reflect the distribution of vegetation cover and the distinction between silty clay soils in the valleys and ferruginous duricrust exposed on the plateaus. Geochemical differentiation factors are closely related to the nature of sampled materials and reflect the relative amounts of major constituent minerals estimated by normative calculation.Duricrust samples with high Fe and Al content are also enriched in trace elements, P, V, Cr, As, Mo, Nb and Cu, immobilized in the weathering profile with secondary oxihydroxide minerals.Soils of flats are composed mainly of quartz and kaolinite; they also concentrate heavy minerals characterized by high contents of Zr, Ti, Ce and Y.Accumulation of detrital material at the periphery of duricrust plateaus is marked by a geochemical halo of higher contents in Zr and quartz at their periphery. This feature is clearly visible on SPOT imagery as a zone of high reflectance, devoid of vegetation.The density of vegetation on duricrust is related to its kaolinite content. Its distribution is characterized by a striped pattern, which is probably controlled by bedrock lithological structures preserved in the lateritic cover.This study shows the relationships, both direct and indirect, existing between spectral reflectance and geochemical composition of superficial lateritic formations. Many other landscape features identified with high resolution on SPOT images provide complementary information, which could be very helpful at various stages of geological and mineral exploration in lateritic terrain. 相似文献
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重矿物除了作矿物鉴定以外,还可进行单矿物的微量元素测定,给地球化学勘查提供有用的信息,使化探采样的对象扩大到重矿物领域。重砂矿物中除了主要元素外,还含有多种杂质元素,这些杂质元素的种类、含量高低及元素间的比值变化,是受矿物生成时的地质环境制约的。据此可以知道矿物生成时的温度、岩石和矿床的类型以及岩体的含矿性。本文综述了十几种重砂矿物中微量元素的变化与地质,岩石和矿床的关系,及用于地球化学找矿的可能性。 相似文献
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浙江临安西天目地区地处早古生代扬子被动陆缘和晚中生代西太平洋活动陆缘构造叠加区域.该区发育碳酸盐岩建造,有大量的脉岩出露,环形、放射状断裂构造发育,具有面型蚀变及铜、铅、锌、金等多个矿（化）点;重磁等物探信息显示,该区深部发育EW向深断裂和隐伏岩体;化探扫面揭示,区内钨、钼、铋、铜、铅、锌、金、银、砷等元素背景高;自然重砂调查反映,白钨矿、铅族、钼族等重砂矿物组合具有异常显示.综合成矿地质条件及物、化、重砂异常等信息,认为该区具有寻找斑岩型、夕卡岩型、低温热液型钨、钼、铜、铅锌、金银等多位一体矿床的潜力. 相似文献
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油气勘探中遥感方法新进展与趋向 总被引：5，自引：0，他引：5
:文中介绍了遥感在油气勘探中的最新应用 :( 1)以遥感为主线的油气勘探集成技术应用 ,包括油气遥感直接勘探研究与应用、小型及隐蔽油气藏遥感间接勘探应用和钻探靶区的遥感、物探和化探综合评价 3个阶段的应用层次。 ( 2 )以高分辨率遥感数据与GIS技术相结合进行储层裂缝识别与有利含油气区块评价。未来几年的遥感技术将有更大的突破 ,表现在 :( 1)超光谱卫星遥感与直接探测地表油气微渗漏蚀变矿物 ;( 2 )热遥感成像资料等在油气直接勘探中的应用 ;( 3)卫星雷达干涉测量技术与重力资料相结合的油气勘探应用。 相似文献
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2005年在西藏达孜县羌堆铜矿区进行了1/2.5万的路线土壤测量(40 km2),路线土壤测量省力经济,适用于地形复杂、植被发育的通行困难地区;根据土壤测量的地化异常特征推断了3条断裂、3个半隐伏-隐伏的斑岩体,发现12处地化异常,其中11-A为已知矿致异常,8-A,4-B,6-A,9-A异常分别为寻找斑岩型铜矿、构造蚀变岩型金矿的良好靶区,可安排地质物探综合普查. 相似文献