共查询到20条相似文献，搜索用时 15 毫秒
1.
D. D. Picklyk 《Mathematical Geology》1977,9(3):301-308
General principles in evaluation and selection of data to be included in computer processible files intended for use in assisting regional resources appraisal are discussed against the background of activities related to file assembly at the Geological Survey of Canada. Some of the principles discussed are currently being implemented in the assembly of files at the GSC where they apply to the specific data being collected. Others are apparent from our analysis and would be applied if different data were being collected. The files currently being assembled at the Survey are intended to assist the commodity geologists in all project-related activities, one of which is regional resource appraisal. Prior to the commencement of data assembly, each data item considered for inclusion in the data files was scrutinized by members of the Economic Geology Subdivision in order to establish how it would contribute to the overall objectives of the file. At the same time strict definitions of each item were established. The main criteria applied to each data item considered for inclusion in the files were (a) the necessity of the item to satisfy the objectives of the file within the practical limitations of the resources available and (b) the general availability of the item. The characteristics found necessary to ensure integrity of the data files were (a) uniformity—the same definitions must apply to each item of similar type, (b) consistency—analytical results should be of the same method or differences noted in order that the data may be compared, and (c) mutual exclusiveness—especially when dealing with data referring to size. Such data should never be repeated in another part of the file or be included as part of another item.This paper was presented at the International Geological Correlation Program (IGCP) Project 98 entitled Standards for Computer Applications in Resource Studies held at Loen, Norway, September 27–October 1, 1976. 相似文献
2.
3.
O. R. Eckstrand 《Mathematical Geology》1977,9(3):235-243
The Geological Survey of Canada (G.S.C.) has been involved in national appraisal of resources of certain commodities for nearly two decades beginning with a national study of iron deposits in 1955. In 1972, the first national appraisal to rapidly estimate total resources of Cu, Pb, Zn, Ni, Fe, Mo, and U in Canada was carried out largely by economic geologists. This exercise produced, among other things, a better definition of G.S. C. needs for building computer files in support of mineral deposits studies and mineral resource appraisal. Objectives of this paper are threefold: (1) to outline general methodology for the kind of mineral resource appraisal carried out by the G.S.C. in 1972; (2) to identify types of information required in that appraisal; and (3) to indicate types of information on mineral deposits for which it seems advantageous for the G.S.C. to construct computer files, and how these files relate to mineral resource appraisal. Methodology is fairly straightforward for appraisal of reserves (known, measured resources), but is much more problematic for appraisal of undiscovered resources. For the latter, G.S.C. economic geologists make use of two basic concepts: the deposit model, which is a generalized deposit type, distinguished by its geological attributes and host rock environment, and containing characteristic amounts of specified commodities; and the metallogenic region, which is a geographic area of more or less homogeneous geology deemed favorable for the presence of a particular deposit model. Background information required for appraisal of undiscovered resources includes the following: (a) data on distribution and geology of Canadian deposits and occurrences; (6) data on geology of important, foreign deposits; (c) knowledge of Canadian geology, commensurate with metallogenic requirements; (d) knowledge of current theories of ore-forming processes; and (e) appreciation of the amount, location, and effectiveness of past exploration in Canada. At present, only identity, location, and certain simple geological features of Canadian deposits are considered practical for a general computer file of mineral deposits. The fundamental activity of the G.S.C. in the sphere of mineral deposits is a number of broad studies on the geology of certain commodities in Canada carried out by economic geologists. Appraisal of mineral resources is based directly on the results of those studies, and is done by the same economic geologists. Construction of G.S.C. computer files is in response to needs defined by economic geologists, mainly in the context of their broad studies.This paper was presented at the International Geological Correlation Program (IGCP) Project 98 entitled Standards for Computer Applications in Resource Studies held at Loen, Norway, September 27–October 1, 1976. 相似文献
4.
Resource prediction is necessary for allocation of exploration efforts to keep pace with future demand and the growth pattern of a commodity. Zipf's law, a mathematical relationship between size and rank of discrete phenomena, has been used for resource prediction of oil in Western Canada, uranium, gold, tin, and lead-zinc deposits in Australia, and copper deposits in Zambia. The model, applied to lead-zinc metal accumulation of 24 known precambrain deposits in India, indicates that about 75% of the lead-zinc metal is yet to be discovered. The probability of occurrence of 14 deposits of larger dimensions based on the cumulative percentage frequency for different accumulations lies between 5 and 30%. In future exploration, preference should be given to more effort in the Banded Gneissic Complex of Rajasthan in comparison to Aravalilis of Rajasthan, followed by similar environments throughout the country and Palaeozoic strata of the Himalayas. 相似文献
5.
基于大数据和人工智能技术的数据驱动科学范式推动地球科学研究发生了变革。作为地球科学的重要分支,现代矿床学经历了百余年的发展,已经积累了海量的数据资料,这些数据的流通和共享是发挥其资源价值的关键。文章介绍了中国“地质云”与全球矿产资源储量动态评估数据库、澳大利亚深部地球探测计划AuScope、美国矿产资源在线空间数据库、国际经济地质学家学会(SEG)Geofacets数据库、美国标准普尔公司SNL Metals&Mining数据库等国际主要矿床数据库的情况;同时,列举了应用大数据思维和人工智能方法在区域成矿规律、矿床成因机制、矿床类型判别、资源潜力评价、战略咨询等方面取得的若干重要进展。文章提出,未来在深时数字地球国际大科学计划的平台下,整合全球海量矿床数据,建设开放、共享、统一的矿床大数据平台势在必行。 相似文献
6.
This study used regional geochemical survey data (1:200,000 scale) from the Manzouli area of China to assess mineral resources. Geochemical survey data was rasterized and a geochemical atlas was generated, with the image pixel size determined according to geochemical exploration sample point spacing. The Wunugetushan, Babayi, and Badaguan porphyry copper deposits were selected as model areas for the assessment of copper mineral resources. Three parameters were considered for the calculation of the mineral resources. An ore-bearing hydrothermal alteration coefficient was determined based on geological characteristics and geochemical characteristics of the model area, in order to determine alteration intensity; a denudation coefficient was calculated to determine denudation extent; and a mineralization intensity coefficient was calculated to determine the intensity of mineralization within each pixel. Resource estimation was conducted through regression analysis of model deposit resources and coefficients. The results can be used to determine prospecting target areas based on frequency classification and can be used to estimate the number of ore deposits. Results show that resource estimation using rasterized geochemical data provides high prediction precision and accurate positioning. 相似文献
7.
8.
玻利维亚的铜矿规模以中小型为主,主要成矿类型为红层型(砂岩层)、沉积相关脉状型、VMS型和IOCG型等。金矿规模以中小型为主,主要成矿类型有火山成因浅成热液型、与深成岩相关的脉状矿床、造山型矿床和砂金矿。锡矿发育众多大型、超大型矿床,成矿类型以玻利维亚型多金属脉状矿床和与长英质深成岩相关的脉状矿床为主,少量砂锡矿。铁矿以El Mutún超大型BIF型铁锰矿著称。西科迪勒拉和玻利维亚高原有重要的浅成低温热液贵金属资源潜力;东科迪勒拉北部主要为钨、锡、金、锑资源,中部为锡、银、金、锑资源,南部有金、锑、银、铅、锌潜力;次安第斯带南部有银-锌资源潜力;查科-贝尼平原带有广泛的砂金矿资源;前寒武纪克拉通内金、铂、镍、钽、铜和铁锰资源潜力丰富。 相似文献
9.
Robert G. Garrett 《Mathematical Geology》1978,10(5):481-494
An abundance model resource appraisal has been undertaken for 10 mineral commodities in Canada: nickel, copper, zinc, lead,
molybdenum, uranium, silver, gold, chromium, and tin. The purpose of the appraisal was to investigate the applicability of
the model to the Canadian situation. Resource appraisals for the first 6 of the commodities studied have been published following
deposit modeling studies. For many other commodities studied have been published following deposit modeling appraisals. The
demonstration of the relevance of the abundance model to Canada would allow its application in such cases. The data presented
in this paper indicate that the approximate relation, resource (short tons)=abundance (%)×1010. holds true for all commodities studied except chromium and tin. As the resources versus abundances relationship observed
on a global scale is observable in Canada, it is concluded that Canada is a sufficiently large fraction (∼7%) of the earth's
continental crust to represent a valid sample of that crust. Canada appears to be relatively well endowed with resources of
copper, molybdenum, lead, and zinc, and poorly endowed with chromium and tin. It is proposed that the intersection of national
boundaries with the boundaries of the world's metallogenic provinces is of greater importance than the intensity of past search,
a feature that has been suggested in other studies. If these areas overlap, a nation may be self sufficient in a commodity:
if they do not, the nation must import, or find a nationally available substitute. The sources of information used in the
appraisal are outlined together with an analysis of the problems encounterea and the time requirements.
This paper was presented at the International Geological Correlation Program (IGCP) Project 98: “Standards for Computer Applications
in Resource Studies” held at Taita Hills Kenya, November 8–15, 1977. 相似文献
10.
Summary The Finnish Ore Data File has already provided valuable experience on building, maintaining, and using an extensive data file with a great diversity of data. The file attempts to accommodate all relevant data on ore deposits in metamorphosed and strongly deformed Precambrian terrain. Because the deposits dealt with are generally well-studied and documented, they provide a great deal of precise information on ore deposits. The question arises as to how the system could be used internationally, especially bearing in mind developing countries. The two problems which should be solved for this purpose are: first, the forms, codes, and programs should be translated from Finnish into English; second, the structure of the file should be simplified to meet the demands of less studied areas and deposits. However, both problems could be resolved relatively easily without changing the basic principles involved.This paper was presented at the International Geological Correlation Program (IGCP) Project 98 entitled Standards for Computer Applications in Resource Studies held at Loen, Norway, September 27–October 1, 1976. 相似文献
11.
中国大陆斑岩铜矿资源潜力定量评价 总被引：1，自引：0，他引：1
应用美国"三部式"资源评价方法原理,对中国大陆斑岩铜矿成矿地质背景、时空分布规律、矿床模型等方面研究,圈出46个远景区;以中国1999年金属储量数据库和区划矿产地数据为基础,建立了铜矿数据库共984个,分不同类型进行品位吨位的研究,以此为基础构造出数字找矿模型和开发出矿产资源定量评价模型程序,并计算了每个远景区的概率资源量,为评估中国斑岩铜矿资源潜力提供了参照。 相似文献
12.
Gary Kingston 《Mathematical Geology》1977,9(3):273-279
Classification of nonfuel mineral reserves is the prime function of the Bureau of Mines Minerals Availability System (MAS). The MAS classifies reserves through geologic, engineering, and economic evaluation of presently identified resources. The classification of a reserve is accomplished by calculating the identified-resource availability in terms of present and prospective prices (costs). The availability of mineral supplies is definable as a function of natural physical phenomena, industry technology, costs, capital generation, time requirements, supply site infrastructure, mineral-land accessibility, environmental restraints, and political conditions. These and other criteria are being systematically evaluated and quantified in the MAS to arrive at verifiable estimates of present and future United States mineral reserve positions. The MAS is structured such that mine and deposit evaluations form the common denominator of supply, and costs represent the basic mechanism of supply analysis. A comprehensive, systematically structured minerals evaluation system is needed to objectively assess mineral supply impacts on the economy and society. The MAS is an element of that capability wherein a systematic unraveling of the mineral supply network is performed, with the results structured in electronic retrieval format for rapid listing, manipulation, and supply analysis. The key activity in accomplishing this end is the mineral deposit evaluation process that provides uniform, maintained information sets for aggregation into summary products. The MAS thereby enhances the basic data and response capability to support mineral specialists, mineral policy analysis, and the Government and industry decision process.This paper was presented at the International Geological Correlation Program (IGCP) Project 98 entitled Standards for Computer Applications in Resource Studies held at Loen, Norway, September 27–October 1, 1976. 相似文献
13.
近年来通过中国地调局在新疆东天山浅覆盖区开展1∶5万化探示范项目,圈定了一批具找矿价值的铅锌银铜为主成矿元素的化探异常,通过异常查证和矿产评价工作,采用化探、物探、探槽工程揭露、钻探验证等综合技术方法,在阿奇山一带浅覆盖地区相继发现了一批以铅锌银铜为主的矿产地,发现了阿奇山火山沉积-叠加热液交代改造型铅锌矿床、屹立火山热液型富银铅矿(黑矿型)、1288高点铜矿点等十余处。通过矿产资源评价工作,目前确定阿奇山铅锌矿资源量达大型矿床规模。屹立富银铅矿以其品位高、埋藏浅、开采经济价值高为特点。阿奇山地区铅锌矿找矿成果揭示了阿奇山一带浅覆盖区有巨大的找矿潜力。 相似文献
14.
本次研究的中蒙俄跨境区在大地构造位置上位于中亚造山带东部,是多种矿产的成矿密集区。本区成矿区带包括2个Ⅰ级成矿域、2个Ⅱ级成矿省和9个Ⅲ级成矿带。区内金属矿床的分布主要受北东-北北东向及北西向两组断裂的控制。研究区重点金属矿产中,铜矿床以斑岩型为主;金矿床以岩浆热液型为主,也有部分作为伴生矿种产于斑岩型铜(金)矿床之中;铅、锌矿床以热液脉型为主;铀矿床以火山岩型为主。铜、金、铅、锌、铀成矿作用与燕山期岩浆及其热液活动关系最为密切。本研究区具有良好的成矿地质条件和巨大的找矿前景,是进一步开展铜、金、铅、锌、铀等金属矿产找矿工作的重点地区。 相似文献
15.
Standards for the exchange of machine-readable data are discussed at five levels covering (1) physical characteristics of the medium used in the exchange, (2) overall structure of the data file, (3) format of individual records, (4) types of information contained in a record, and (5) authority files for information definition. The standards are used by the National Geothermal information Resource for compilations of geothermal energy data.This paper was presented at the International Geological Correlation Program (IGCP) Project 98 entitled Standards for Computer Applications in Resource Studies held at Loen, Norway, September 27–October 1, 1976. 相似文献
16.
G. Gabert 《Mathematical Geology》1978,10(5):425-432
Based on the results of the Conference on Resource Assessment Techniques of IGCP Project 98 in Loen, Norway, 1976, the importance
of mineral and energy inventories is demonstrated by their long-term objectives which aim at the solution of problems of quantitative
and qualitative mineral and energy reserve and resource assessments, estimates of the exploration potential, supply analysis,
future land-use planning, and national mineral policy. Prior to establishing a mineral and energy inventory it is essential
to clearly define both the long-term and short-term objectives, because they control the scope of an inventory and determine
the approach to and the method of constructing the data base. Only then can questions be answered as to the kind of data required,
the advantages of regional-versus commodity-based inventories, the necessity of computer-processable data files, the availability
of a user-oriented data base management system, and the usefulness of conducting a pilot project. Examples are given for simple
and complex types of mineral and energy inventories. The “Mineral Deposit Inventory” of the Institute for Geosciences and
Natural Resources, Hannover, Federal Republic of Germany, serves mainly as an information and reference system, whereas the
mineral inventory of “Project Manitoba” of the Geological Survey of Canada forms the base for reserve and resource assessment
as well as land-use planning of that province. For developing and industrialized countries alike, mineral and energy inventories
are appropriate tools in planning new exploration activities and decisions on future national mineral policy. Used by the
Regional Mineral Resources Development Centers of ESCAP and ECA, the United Nations economic commissions in Asia and Africa,
these tools could be of great advantage and mutual benefit to the developing countries of those regions.
This paper was presented at the International Geological Correlation Program (IGCP) Project 98: “Standards for Computer Applications
in Resource Studies” held at Taita Hills, Kenya, November 8–15, 1977. 相似文献
17.
18.
19.
Prof. Dr. S. Jankovic 《International Journal of Earth Sciences》1990,79(2):467-478
The principal copper deposits associated with Upper Creataceous — Laramian calc-alkaline volcano-plutonic complexes in the Bor district are classified as follows: Volcanogenic massive sulphide deposits are situated in andesitic volcanics, and are composed of pyrite and copper sulphides. Multistage deposition of mineral associations in this area was controlled mainly by secondary boiling of hydrothermal fluids rich in sulphur. Apart from cupriferous pyrite deposits, volcanogenic massive polymetallic deposits, containing a pyritic ZnCu+Pb association, have been found recently in hydrothermally altered dacite- and esite pyroclastics. Porphyry copper deposits are mainly situated in volcanic piles related to subvolcanic intrusions and/or hypabyssal plutons. Some porphyry copper deposits occur in the same structures with massive sulphide orebodies, lying above the porphyry copper system. Conglomerate-type ores consisting of clasts of massive sulphide in an andesitic pile have been discovered recently. 相似文献
20.
“中南地区矿产资源潜力评价”项目按照《全国矿产资源潜力评价技术要求》的统一规定,对中南地区铁等20个重要矿种,从成矿地质背景、地球物理、地球化学、遥感、自然重砂、成矿规律、资源预测、成矿作用和找矿方向等方面进行了全面、系统的资料汇总和综合研究; 在分析重要矿产的成矿地质背景和划分构造单元的基础上,提出了对扬子陆块与武夷-云开造山带西南段界线等的新认识及其证据; 通过总结区内不同大地构造相、不同时代重要矿产的成矿作用和时空分布规律,圈定了物探、化探、遥感和自然重砂的各类综合异常,编制了系列图件,研建了各类数据库系统; 客观评价和定量预测了重要矿产的资源潜力,圈定了找矿远景区,指出了找矿方向。该项目取得的各项成果为今后开展更加深入的区域成矿规律研究和矿产勘查提供了翔实可靠的地质依据。 相似文献