共查询到20条相似文献，搜索用时 93 毫秒
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萝藤铁矿床为全隐伏矿床,产于泰山岩群山草峪组地层中,发育两个铁矿体。矿体呈层状产出,矿床埋深530m。利用物探高精度磁测,结合矿床地质特征,两者结合的综合式找矿方法。是当前寻找隐伏沉积变质型"鞍山式"铁矿的有效方法。 相似文献
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铜陵大成山地区金矿通过区域地质背景分析以及相邻矿区成矿模式,结合本区的物探和化探成果,总结本区成矿类型,矿床地质特征以及未来找矿的前景。 相似文献
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本文结合铅锌多金属矿床的矿物组成及岩、矿石的电性参数分析了那佰铅锌多金属矿利用电法勘探圈定成矿靶区的可行性,根据已知矿体上的视电阻率、视极化率特征,总结出那佰铅锌多金属矿不同类型矿床的激发极化和电阻率异常的规律。利用这些规律推断的异常基本得到证实。激发极化法勘探的效果表明,在矿区采用物探方法圈定找矿靶区可以得到较好的地质效果。 相似文献
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世界各国大型古代海相固体钾盐矿床多数是在石油、盐岩矿、盐泉卤水等资源的勘查过程中被发现的。国内几十年的找钾实践证实,我国缺乏大型海相固体钾盐矿床,近年来在新生代陆相沉积盆地中寻找大型固体钾盐矿床的努力也没有取得明显进展。我国已探明的钾盐储量主要分布在青海柴达木盆地和新疆罗布泊的11个盐湖及其晶间卤水中,约占资源总量的90%以上;以固体钾矿赋存的资源量少且品位不高,仅占己知总量的2.6%。从1958年察尔汗盐滩生产出第一批953吨钾肥填补我国钾肥生产的空白,到年产150万吨KCl的卤水钾盐开发规模的形成;从1995年在罗布泊发现大型卤水钾矿,到2008年预期生产120万吨K2SO4,显示了我国干旱区盐湖卤水钾盐资源的重要位置。有专家建议,今后的工作应在深入研究成盐盆地基底构造和岩相古地理的基础上,进一步划分可能成钾的次级盆地并进行重点勘探和研究。借鉴世界各国找钾经验,将地质观察分析、地球物理探测、地球化学与水化学等方法综合运用,我国的探盐找钾工作有可能取得突破性进展。 相似文献
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The working group Mathematical Geology of the Freie Universität Berlin was formed in 1971. We review quantitative methods used by the working group since 1983 to treat mineral exploration problems. The methods applied vary from elementary statistical analysis of multivariate exploration data to optimal strategies for selecting favorable targets, and from multiobjective decision-making for additional drill hole locations to expert systems in exploration.The methods applied are directly related to the level of information at each stage of the exploration process. Special emphasis was placed on the relationship between and evaluation of subjective and objective data. Case studies illustrating the various methods are presented for different kinds of mineral deposits and exploration environments. 相似文献
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Assessment of Exploration Bias in Data-Driven Predictive Models and the Estimation of Undiscovered Resources 总被引：3，自引：0，他引：3
The spatial distribution of discovered resources may not fully mimic the distribution of all such resources, discovered and
undiscovered, because the process of discovery is biased by accessibility factors (e.g., outcrops, roads, and lakes) and by
exploration criteria. In data-driven predictive models, the use of training sites (resource occurrences) biased by exploration
criteria and accessibility does not necessarily translate to a biased predictive map. However, problems occur when evidence
layers correlate with these same exploration factors. These biases then can produce a data-driven model that predicts known
occurrences well, but poorly predicts undiscovered resources.
Statistical assessment of correlation between evidence layers and map-based exploration factors is difficult because it is
difficult to quantify the “degree of exploration.” However, if such a degree-of-exploration map can be produced, the benefits
can be enormous. Not only does it become possible to assess this correlation, but it becomes possible to predict undiscovered,
instead of discovered, resources.
Using geothermal systems in Nevada, USA, as an example, a degree-of-exploration model is created, which then is resolved into
purely explored and unexplored equivalents, each occurring within coextensive study areas. A weights-of-evidence (WofE) model
is built first without regard to the degree of exploration, and then a revised WofE model is calculated for the “explored
fraction” only. Differences in the weights between the two models provide a correlation measure between the evidence and the
degree of exploration.
The data used to build the geothermal evidence layers are perceived to be independent of degree of exploration. Nevertheless,
the evidence layers correlate with exploration because exploration has preferred the same favorable areas identified by the
evidence patterns. In this circumstance, however, the weights for the “explored” WofE model minimize this bias. Using these
revised weights, posterior probability is extrapolated into unexplored areas to estimate undiscovered deposits. 相似文献
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旅游资源开发潜力评价的多层次灰色方法——以老子山风景区为例 总被引：7，自引：1，他引：6
旅游资源开发潜力评价,是对旅游资源是否具备发展旅游业的条件并进而获取经济、社会和环境效益的能力的衡量。其评价不仅着眼于旅游资源的本体价值,还关注对旅游资源开发不可或缺的环境条件和开发效益等。文章在旅游资源开发潜力评价方法上进行创新,将灰色理论和层次分析法相结合,以洪泽县老子山风景区为例,对其六个景区的旅游资源开发潜力进行了评价和排序。研究表明,旅游资源开发潜力的多层次灰色评价方法所需样本量小,灰色评价过程有助于解决层次分析法评价中出现的信息不完备和不确切问题,使评价结果更加客观可信。与传统的旅游资源评价方法相比,此方法能够有效解决旅游资源等级与开发潜力之间的错位问题,从而对旅游开发实践更具科学指导意义。 相似文献
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人类对月球进行科学探测的半个多世纪以来,经历了第一次探月高潮、探月相对宁静期和第二次探月高潮3个阶段,对月探测技术也经历了飞越月球、环绕月球、硬着陆、软着陆、无人采样返回以及载人登月的发展,水平不断提高。在全月地形探测、构造特征认识以及资源探测上有了许多重大进步,但仍主要集中在月球表层及次表层。从对月探测技术和研究两方面回顾了月球探测的发展历程,并根据目前中国"嫦娥一号"和"嫦娥二号"绕月探测的新技术和其他国家的月球探测情况,在探测手段和研究内容等方面对未来月球探测进行了展望。 相似文献
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Dan Gill 《Natural Resources Research》1992,1(3):231-238
Oil exploration in Israel began in 1953. Until 1991 a total of 263 exploration wells and 122 development wells were drilled, 3 oil fields and 5 gas fields were discovered, and 4 noncommercial oil discoveries and 1 noncommercial gas discovery were made. Proven in-place reserves amount to 70 million barrels of oil equivalent (MMBOE). Exploration focused on six main plays: Syrian Arc anticlines; Mesozoic platform-edge, structural-stratigraphic traps; the Dead Sea graben; Early Mesozoic structures; Saqiye Group biogenic gas; and Hula Group biogenic gas. The more significant discoveries are associated with the first two plays. Ninety percent of the proven reserves were discovered by the first 71 wildcats, which constitute 27 percent of all wildcats drilled to date. During this phase of exploration, the average success was 7 percent, and the average discovery rate was 0.88 MMBOE per wildcat. Most of the following 192 wildcats were dry holes. If, as experts claim, significant reserves are still undiscovered, previous exploration must be deemed inefficient. The quantitative model of the discovery process also leads to such an assessment. 相似文献
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极地天然气水合物分布于南北极大陆及其毗邻海域的沉积物（岩）中,与广泛分布的永久冻土带密切相关,资源潜力巨大。极地天然气水合物储层类型主要为富砂沉积物储层,能提供天然气水合物高浓度聚集所需的储集渗透性,最可能实现远景勘探和商业利用。随着全球气候变暖,北冰洋海冰加速融化和航道开通,北极地区蕴藏的丰富资源都将从潜在利益变成现实利益,各国的权益纷争也将愈演愈烈。本文综述了极地天然气水合物勘探开发现状和相关国家的水合物开发政策,依据中国海陆域天然气水合物勘查开发现状,提出了中国参与极地天然气水合物研究和开发的思路和途径,为中国极地资源开发利用战略提供参考。 相似文献
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The Salina Basin historically has been an exploration desert—a home of dryholes. Although this basin, which underlies much of north-central Kansas, may never be a prolific source of hydrocarbons, recent research into the maturation and geochemistry of organic matter and oils in Kansas can provide guidelines for a new exploration strategy. The Salina Basin is similar to the oil-productive Forest City Basin in northeastern Kansas in many ways. Both basins originated as a single large basin (i.e., the North Kansas Basin) prior to the rise of the Nemaha Uplift in Late Mississippian-Early Pennsylvanian time. Their Paleozoic stratigraphy thus is similar and the axes of both basins are presently at approximately the same depth. Thermal maturation modeling and available organic-matter maturation data indicate that the lower Paleozoic rocks in the axes of both basins are in the early stages of oil generation. In the Forest City Basin the Ordovician Simpson Group is the deepest known hydrocarbon source-rock—oil-reservoir interval, and by analogy, exploration tests in the Salina Basin, at a minimum, should penetrate through this stratigraphic interval. Ordovician Simpson Group shales in the Forest City Basin are the source rocks for a geochemically distinct oil, which also occurs in Ordovician reservoirs in the extreme southern end of the Salina Basin. To increase the odds of success in an exploration program in the Salina Basin, wildcat wells should be drilled where thermal maturation is greatest. The broad NW–SE-trending basin axis is the most logical area. Exploration tests along this axis in the northern end of the basin may have an extra advantage as organic matter in the Simpson Group may be more thermally mature because of greater burial depth during the Cretaceous. Along the eastern margin of the nearby Central Kansas Uplift and Pratt Anticline, several Paleozoic geologic structures, some of which contain major oil fields, are attributable to tectonic reactivation along the western margin of the Precambrian Central North American Rift System (CNARS). Prospective structural trends in the Paleozoic section of the Salina Basin are anticipated to be associated with this underlying tectonic boundary. The western margin of the CNARS trends NNE–SSW where it passes under the axis of the Salina Basin in northeastern Lincoln and southeastern Mitchell counties. This area is sparsely drilled, with less than two tests per township. If an exploration program can define lower Paleozoic structural closures in this region, these structures may represent the best chance for future petroleum discoveries. 相似文献