GEOPHYSICAL ACTIVITY IN 1967 APPLIED TO MINING EXPLORATION

Geophysics ◽  
1968 ◽  
Vol 33 (6) ◽  
pp. 903-910 ◽  
Author(s):  
Peter J. Hood ◽  
William C. Kellogg
Keyword(s):  
Average Cost ◽  
World Wide ◽  
Geophysical Methods ◽  
Induced Polarization ◽  
Mining Companies ◽  
Electromagnetic Methods ◽  
Polarization Technique ◽  
Mining Exploration

Data on world‐wide geophysical activity in mining exploration programs is collected annually by the SEG Geophysical Activity Committee as part of a continuing service to the industry. The data is obtained by sending out questionnaires to all organizations which are known to be carrying out mining geophysical work; the organizations canvassed include mining companies, contractors, government departments and universities. The questionnaire is divided into three sections, namely ground methods, airborne methods, and research. The data compiled from the questionnaires shows that world‐wide utilization of mining geophysical methods reached a new high in 1967 with total expenditures of U.S. $32,323,240. This was divided as follows: ground methods—$18,106,785; airborne methods—$10,123,405; and research $4,093,050. For the ground methods, most money was spent on the induced‐polarization technique ($5,681,780); electromagnetic methods were second in reported expenditure ($2,010,900). Total reported geophysical line‐mileage flown was 1,275,072 line‐miles, with aeromagnetic surveying being the most popular airborne method. Total amount spent on aeromagnetic surveys was $5,832,564 for 895,420 line‐miles. This gives an average cost for aeromagnetic surveys of $6.50 per line‐mile.

MINING GEOPHYSICAL ACTIVITY IN 1968

Geophysics ◽  
1969 ◽  
Vol 34 (6) ◽  
pp. 848-858
Author(s):  
Peter J. Hood ◽  
William C. Kellog
Keyword(s):  
Geophysical Methods ◽  
The United States ◽  
Induced Polarization ◽  
Magnetic Method ◽  
Research Activity ◽  
Mining Companies ◽  
The Past ◽  
Electromagnetic Methods ◽  
Airborne Electromagnetic ◽  
Mining Exploration

Data on worldwide geophysical activity in mining exploration programs is collected annually by the SEG Geophysical Activity Committee as part of a continuing service to the industry. The data are obtained by sending out questionnaires to all organizations which are known to be carrying out mining geophysical work; the organizations canvassed include mining companies, contractors, government departments, and universities. The questionnaire is divided into three sections, namely ground methods, airborne methods, and research. The data compiled from the questionnaires shows that world‐wide utilization of mining geophysical methods reached a new high in 1968 with total expenditures of U.S. $41,367,011. This was divided as follows: ground methods—$20,398,288; airborne methods—$14,937,733, and research—$6,039,990. For the ground methods, most money was spent on induced‐polarization techniques ($6,735,315); geochemical methods were second in reported expenditure ($3,437,712). The statistics for the past seven years show that induced‐polarization methods have gradually outstripped the electromagnetic methods as the principal ground prospecting tools used in the search for sulfides. Since 1966, utilization of ground electromagnetic methods has definitely declined and in 1968 more than four times as much money was spent on induced polarization as on electromagnetic methods. The expenditure for mining geophysics research reached a new high of $6,039,990 in 1968 which is an increase of 48 percent from 1967. The leading research activity was the magnetic method, and in second place was electromagnetic method research. The amount of money spent on mining geophysics research increased by 54 percent in the United States, and significant increases also occurred in Canada and Europe. In 1968, the total reported geophysical line‐mileage flown was 1,575,835 line‐miles, with aeromagnetic surveying again accounting for most line‐mileage (837,068). Typical line‐mileage costs in 1968 for the various airborne geophysical methods were: aeromagnetic U. S. $6.75; airborne electromagnetic U. S. $16; combined airborne electromagnetic/magnetic U. S. $24; airborne radiometric U. S. $7. Airborne radiometric line‐mileage showed a nine‐fold jump from 1967 to 1968, when the reported line‐mileage was 400,559

Hydrogenation of Unsaturated Six-Membered Cyclic Hydrocarbons Studied by the Parahydrogen-Induced Polarization Technique

2016 ◽  
Vol 120 (25) ◽  
pp. 13541-13548 ◽  
Author(s):  
Dudari B. Burueva ◽  
Oleg G. Salnikov ◽  
Kirill V. Kovtunov ◽  
Alexey S. Romanov ◽  
Larisa M. Kovtunova ◽  
...  
Keyword(s):  
Induced Polarization ◽  
Cyclic Hydrocarbons ◽  
Polarization Technique

Delineation of subsurface variability in clay-rich landslides through spectral induced polarization imaging and electromagnetic methods

2018 ◽  
Vol 245 ◽  
pp. 292-308 ◽  
Author(s):  
Jakob Gallistl ◽  
Maximilian Weigand ◽  
Margherita Stumvoll ◽  
David Ottowitz ◽  
Thomas Glade ◽  
...  
Keyword(s):  
Induced Polarization ◽  
Polarization Imaging ◽  
Spectral Induced Polarization ◽  
Electromagnetic Methods

INTERDEPENDENCE IN WORLD‐WIDE OIL EXPLORATION

Geophysics ◽  
1958 ◽  
Vol 23 (2) ◽  
pp. 318-325
Author(s):  
D. C. Ion
Keyword(s):  
World Wide ◽  
Geophysical Methods ◽  
Oil Industry ◽  
Oil Exploration ◽  
Mutual Dependence ◽  
Oil Companies ◽  
The Past ◽  
The World ◽  
Geological And Geophysical Methods ◽  
Early Training

Current exploration for oil is being conducted by governments, major integrated oil companies, independent oil companies and syndicates, all of whom have different interests. The interdependence of the various aspects of exploration, production, transportation, refining and consumption within the oil industry is obvious; but the interdependence of the producing, transit, refining, and consuming countries has only recently been realized by the world. Within the exploration branch of the oil industry the mutual dependence of geological and geophysical methods has become generally accepted over the past thirty years. Good early training and collaboration along the whole chain of exploration can solve many industrial problems, and education can solve the world‐wide problems between countries

GEOPHYSICAL ACTIVITY IN 1968

Geophysics ◽  
1969 ◽  
Vol 34 (6) ◽  
pp. 821-847 ◽  
Author(s):  
S. J. Allen
Keyword(s):  
World Wide ◽  
Petroleum Exploration ◽  
Geophysical Surveys ◽  
Mining Exploration

Total expenditures reported for geophysical surveys for all purposes on a world‐wide basis during 1968 were $800.6 million, up 1 percent from the $790.9 million reported in 1967. This comprises $734.0 million for petroleum exploration, down 1 percent from the $744.9 million reported in 1967; $41.4 million for mining exploration, up 28 percent from the $32.3 million reported in 1967; $20.3 million for groundwater, engineering, and construction, up 62 percent from the $12.6 million reported in 1967; and $4.9 million for oceanographic surveys, up 325 percent from the $1.1 million reported in 1967. The expenditures for petroleum exploration were 91.7 percent of the total for all purposes, compared with 94.1 percent reported in 1967.

A GEOPHYSICAL CASE HISTORY OF THE LAKESHORE ORE BODY

Geophysics ◽  
1971 ◽  
Vol 36 (6) ◽  
pp. 1232-1249 ◽  
Author(s):  
Philip G. Hallof ◽  
Emil Winniski
Keyword(s):  
Direct Detection ◽  
El Paso ◽  
Geophysical Methods ◽  
Field Measurements ◽  
Induced Polarization ◽  
Copper Ore ◽  
Ore Body ◽  
Ore Mineralization ◽  
History Of ◽  
Geophysical Technique

The Lakeshore ore body is in Pinal County, Arizona about 30 miles south of Casa Grande. In February, 1969 when the latest figures were published, the ore reserves were reported at 241 million tons of disseminated sulfide ore (0.7 percent copper) and 24 million tons of concentrated metallic ore (1.69 percent copper). Sulfide copper ore was first intersected in July, 1967 in Hole P‐3. The magnetite‐pyrite‐chalco‐pyrite mineralization occurred in a banded tactite at a depth of 1147 ft. Hole P‐3 was the fourth of several holes that were drilled to determine the source of an induced polarization anomaly that had been outlined, at depth, to the west of the old Lakeshore pit. The successful conclusion of this exploration program by El Paso Natural Gas Company is an excellent example of an integrated exploration approach. The application of regional geological planning, geophysical methods, and detailed geological reasoning resulted in the discovery of a major copper ore body. Due to the depth of the ore zone and the disseminated character of most of the ore, the only geophysical technique that was useful in the direct detection of the ore mineralization was the induced polarization method. Field measurements were made sporadically between August, 1966 and July, 1968. Variable‐frequency induced‐polarization measurements, made using the dipole‐dipole electrode configuration and electrode intervals from 300 ft to 1000 ft, successfully indicated the presence of the metallic mineralization at depth and gave some indication of its extent. Comparisons of the induced polarization data and the appropriate geological sections give information concerning the usefulness of the method.

scholarly journals Resistivity and induced polarization monitoring of biogas combined with microbial ecology at a brownfield site

2015 ◽  
Vol 3 (4) ◽  
pp. SAB43-SAB56 ◽  
Author(s):  
Carlos A. Mendonça ◽  
Rory Doherty ◽  
Nathan D. Amaral ◽  
Blathnaid McPolin ◽  
Michael J. Larkin ◽  
...  
Keyword(s):  
Water Saturation ◽  
Good Practice ◽  
Geophysical Methods ◽  
Ground Surface ◽  
Suspended Sediments ◽  
Induced Polarization ◽  
Gas Content ◽  
Archie’S Law ◽  
Monitoring Wells ◽  
Brownfield Site

The accumulation of biogenic greenhouse gases (methane, carbon dioxide) in organic sediments is an important factor in the redevelopment and risk management of many brownfield sites. Good practice with brownfield site characterization requires the identification of free-gas phases and pathways that allow its migration and release at the ground surface. Gas pockets trapped in the subsurface have contrasting properties with the surrounding porous media that favor their detection using geophysical methods. We have developed a case study in which pockets of gas were intercepted with multilevel monitoring wells, and their lateral continuity was monitored over time using resistivity. We have developed a novel interpretation procedure based on Archie’s law to evaluate changes in water and gas content with respect to a mean background medium. We have used induced polarization data to account for errors in applying Archie’s law due to the contribution of surface conductivity effects. Mosaics defined by changes in water saturation allowed the recognition of gas migration and groundwater infiltration routes and the association of gas and groundwater fluxes. The inference on flux patterns was analyzed by taking into account pressure measurements in trapped gas reservoirs and by metagenomic analysis of the microbiological content, which was retrieved from suspended sediments in groundwater sampled in multilevel monitoring wells. A conceptual model combining physical and microbiological subsurface processes suggested that biogas trapped at depth may have the ability to quickly travel to the surface.

Part I Host States, Mining Companies, and Mining Projects, 2 Mining Companies

2017 ◽  
Author(s):  
Burnett Henry G ◽  
Bret Louis-Alexis
Keyword(s):  
Significant Role ◽  
Mining Industry ◽  
Mineral Deposits ◽  
Mining Companies ◽  
World Today ◽  
The World ◽  
Mining Projects ◽  
Mining Exploration ◽  
P Mining

Mining companies are corporations or partnerships primarily involved in the exploration or production of metal or mineral deposits. There are approximately 2,100 mining companies in the world today, 100 of which are referred to as majors and 200 as mid-tier. Approximately 1,700 junior mining companies (referred to as juniors) constitute the vast majority of mining companies in existence today. These juniors are typically focused on mining exploration and often do not generate revenues. Finally, approximately 80 State-owned national mining companies (NMCs) play a significant role in the global mining industry. This chapter discusses each of these four categories of mining companies in detail, in relation to their respective focus, risks undertaken, and types of investment they attract and disputes in which they may find themselves involved.

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