应用GIS圈定找矿可行地段和有利地段   总被引：37，自引：0，他引：37  

池顺都  赵鹏大 《地球科学》1998,23(2):18

以滇中大红山群铜矿床找矿预测为例,探讨了应用地理信息系统（ＧＩＳ）查明地质异常,圈定“５Ｐ”地段的方法．在各类异常找矿有利度分析的基础上,找矿可行地段和有利地段的圈定按如下步骤进行：建立成矿预测空间模型;圈定找矿可行地段;确定用于预测找矿有利地段的异常组合及数值区间,并决定其权重;所选定的各异常叠合,形成叠合图;确定各级别找矿有利地段的归并标准,归并后圈出找矿有利地段．最后,具体地讨论了大红山群铜矿床的预测结果．  相似文献   

Regional planning's last hurrah: the political economy of the Tumen River regional development plan     

Karl Kim  Chung-Tong Wu 《GeoJournal》1998,44(3):239-247

This paper describes a regional development plan in North East Asia, in the context of regional planning theory and various geo-political changes which have occurred in the region. Known as the Tumen Regional Development Project, the area encompasses parts of North Korea, China, and Russia. On the one hand, the geography, the presence of raw material, and social factors suggest that there may be unique opportunities to develop the region. At the same time, there is increased competition for capital and resources from other regions in the world. Regionalism, therefore, needs to be seen in a global context. After critiquing the plan from the perspective of contemporary regional planning theory, a call for a ‘new paradigm’ of development is issued, one that considers, for example non-traditional industries such as tourism and emphasizes the management of growth as well as its promotion. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

Eastern Asian hydrometeorology simulation using the Regional Climate System Model     

Jinwon Kim  Norman L. Miller  Jai-Ho Oh  Jun-Seok Chung  Deukkyun Rha   《Global and Planetary Change》1998,19(1-4)

We present the hydrometeorology of eastern Asia during April 1995 simulated by the Regional Climate System Model. The amount and location of simulated monthly precipitation agrees well with observations. Soil water content variation was closely correlated with precipitation. Land-surface evaporation and the surface energy budget were strongly controlled by soil moisture content. A sensitivity test with reduced initial soil moisture content suggested that near-surface soil moisture spins up quickly after heavy precipitation events. However, variations in the initial soil moisture field may alter details of the simulated precipitation which can introduce further complexity in climate simulations.  相似文献   

总磁场强度的空间相关及北黄海ML5.0级地震异常     

孙涛  王庆志 《东北地震研究》1996,12(2):44-49

清理攻关后，虽然相关系数法被列为地磁学科预报地震的方法之一，但应用性较差，且震例不多，为了探讨该种方法预报地震的效果，本文对辽宁地区总磁场强度进行了空间相关分析。  相似文献   

吉林省珲春市黄松甸子砾岩型金矿床开采技术条件     

崔奎 《吉林地质》1996,15(1):76-82

本文重点论述吉林省珲春市黄松甸子砾岩型金矿床工程地质特征及基类型的划分，对矿床的工程地质条件给予定性和半定量评价，论述了矿床的开采技术条件。  相似文献   

Endogenous technological change and pollution abatement     

C. S. Kim  N. D. Uri  C. Sandretto  I. W. Parry 《Environmental Geology》1996,27(3):191-197

Nonpoint source pollution control is a more complicated process than traditional analysis suggests. Whether a new pollution abatement technology is developed exogenously or endogenously and the per unit reduction in the rate at which a pollutant associated with the use of a factor of production needed to produce an agricultural commodity due to this technology enters the environment are critical factors in the determination of the effects of agricultural production on the pollutant stock. These are the issues addressed here. The optimal current period research and development expenditures on an endogenously induced abatement technology associated with the use of a factor of production giving rise to environmental externalities are shown to be a function of, among other things, the cumulation of all research and development expenditures, the probability of an abatement technology being developed, the level of use of the factor of production, the unit pollution tax on the factor, the rate of time preference (discount rate), the rate at which the pollutant associated with the factor enters the environment, the rate of discharge of the pollutant stock, and so forth. Finally, the analysis demonstrates that a reduction in pollution by the adoption of an abatement technology may lead to an increase in the pollutant stock as a result of endogenous technological change associated with the pollution abatement. When the rate of pollution reduction is greater than a threshold, however, the adoption of an endogenously determined abatement technology will unequivocally lead to a reduction in the pollutant stock.The views expressed are those of the authors and do not necessarily represent the policies of the US Department of Agriculture or the views of other US Department of Agriculture staff members.  相似文献   

Air quality and view degradations due to copper mining and milling: Preliminary analysis and cost estimates for Green Valley,Arizona     

Hyo-Sun Kim  Dr. DeVerle Harris 《Natural Resources Research》1996,5(2):91-102

Green Valley, Arizona is a retirement community located near major open-pit copper mines. Mining and milling activities create dust, which degrades air quality, and mine dumps and tailings banks, which degrade the viewscape. Although the tailings banks are highly visible, this study found that consumer surplus lost from dust-polluted air is more than twice that from degradation of viewscape. Consumer surplus lost from both air quality and viewscape degradation is estimated to be between $116,000,000 and $169,000,000. These preliminary estimates are based upon two studies: hedonic property values, and a contingent valuation survey of willingness to pay.  相似文献   

The Neftegorsk, Sakhalin Island, earthquake of 27 May 1995   总被引：1，自引：0，他引：1  

A. I. Ivashchenko    Ch.U.  Kim  L. S. Oscorkin    L. N. Poplavskaya    A. A. Poplavsky    R. N. Burymskaya    T. G. Mikhailova    N. F. Vasilenko  M. I. Streltsov 《Island Arc》1997,6(3):288-302

Abstract Past seismic catastrophes were unknown in Sakhalin Island before 1995 except those suggested from findings of paleoseismodislocations. The first time that dwellers have experienced such a catastrophe in the Sakhalin Island history was on 27 May 1995. The devastating Neftegorsk earthquake occurred in Northern Sakhalin (?= 52.8° north; δ= 143.2° east; H = 18 km; M_s= 7.2), killed almost 2000 people in the small city of Neftegorsk, caused damage and destruction of buildings, bridges, railways and roads, breakage of oil and gas pipelines, electric and communication lines, and was accompanied by large-scale surface phenomena within a source area. It was felt all over the Sakhalin Island, as well as over the closest part of the Eurasian continent. Surface fracturing was the most impressive effect of the Neftegorsk earthquake. The 37-km long, right-lateral strike-slip fault, with a strike of north 15° east and a horizontal displacement up to a maximum of 8 m, has been observed from Taxon Mountain at the south to the junction of the Cadylanye and Keniga Rivers at the north. According to the results of a detailed geological survey and study of the aftershocks, the total extent of the source area was - 80 km. Various secondary phenomena have been observed at the Earth's surface, such as landslides, falls, soil liquefaction, mud volcanoes etc. The earthquake was followed by hundreds of aftershocks within the following 1-2 months. Spatially, the earthquake fault coincides with the pre-existing Upper Piltun fault, known earlier from geological studies. Recent high activity of the latter fault has been recognized only after the Neftegorsk event because of findings of traces of significant past dislocations within the fault zone. From a tectonic viewpoint it can be suggested that the Upper Piltun fault is a Riedel-type shear fracture located between two main regional faults: the Gyrgylanye-Dagy fault at the west and the Piltun-Ekhaby fault at the east. Therefore, its present activity, expressed by the destructive Neftegorsk earthquake, seems to be explained by a long strain accumulation within a broad zone of regional right-lateral shear faulting.  相似文献   

Distribution of Cs and Pu in the surface waters of the East Sea (Sea of Japan)     

Dong-Jin Kang  Chang Soo Chung  Suk Hyun Kim  Kyung-Ryul Kim  Gi Hoon Hong   《Marine pollution bulletin》1997,35(7-12):305-312

Surface and subsurface water samples for ¹³⁷Cs and ^239,240Pu analysis were collected in the East Sea (Sea of Japan) during August 1993. The ¹³⁷Cs levels of the surface waters are quite homogeneous in the East Sea (average = 3.1±0.2 mBq kg⁻¹). The ^239,240Pu levels vary from 6 to 10 μBq kg⁻¹ in the surface. ^239,240Pu to ¹³⁷Cs ratios in the surface water are within 0.002 to 0.003. The East Sea may be regarded as a part of the North Pacific Ocean in terms of ¹³⁷Cs dispersal in the surface, where the ¹³⁷Cs contents of the surface seawater seem to be controlled primarily by the atmospheric input. However, since our sampling was made just two months prior to the widely publicized Russian dumping incident on the 17th October 1993, our measurements may provide background data to assess the immediate impact of the Russian dumping on the levels of ¹³⁷Cs and ^239,240Pu in the East Sea.  相似文献   

内蒙古苏尼特左旗古人类遗存点的发现及意义   总被引：2，自引：0，他引：2  

李龙吟  田明中 《现代地质》1995,9(2):234-238

内蒙古中北部是一个重要的古人类活动区，从１９９２年至１９９４年笔者在该区发现了１３处古人类遗存点，获得了大量的石器，包括３７７３件打制石器和１５８件磨制石器。这些材料具有十分重要的研究价值。本文对石器进行了分类，并对石器的时代及当时的环境特点进行了探讨。  相似文献