scholarly journals Mineral deposit density; an update

2001 ◽  
Author(s):  
W. David Menzie ◽  
David M. Sutphin ◽  
Dan L. Mosier ◽  
James D. Bliss ◽  
Klaus J. Schulz
Keyword(s):  
Mineral Deposit ◽  
Deposit Density ◽  
Mineral Deposit Density

Deposit-Density Models

2010 ◽  
Author(s):  
Donald Singer ◽  
W. David Menzie
Keyword(s):  
Unit Area ◽  
Mineral Deposit ◽  
Unknown Number ◽  
Upper Limits ◽  
Undiscovered Deposits ◽  
Deposit Type ◽  
Deposit Density ◽  
And Control ◽  
Mineral Deposit Density ◽  
Control Regions

A key function of many forms of quantitative mineral resource assessments is estimation of the number of undiscovered deposits. In any given region, there is some fixed but, in most cases, unknown number of undiscovered deposits of a given type—the number could be zero or a larger integer. Many quantitative resource assessments that are based on a common three-part form of assessment (Singer, 1993a) have used expert judgment to estimate the number of deposits. Estimates of this unknown number are presented in a probabilistic form to reflect the uncertainty associated with the estimate. Ideally, estimates of number of deposits should rely on analogies with similar well-explored geologic settings, just as grades and tonnages of well explored deposits serve as analogs of the qualities and sizes of undiscovered deposits. Estimates of the number of undiscovered deposits can be derived from counts of known deposits per unit area in explored control regions. Number of deposits per unit area of the control regions can be used in histograms to show variation of densities by deposit type. Some research has been conducted on densities of several deposit types so that these ratios can be more widely used as a guide for number-of-deposit estimates (Bliss, Orris, and Menzie, 1987; Bliss, Menzie, Orris, and Page, 1987; Bliss and Menzie, 1993; Bliss, 1992b; Root, Menzie, and Scott, 1992). Most of these studies provide point (i.e., single) estimates of the number of deposits per unit area. Singer et al. (2001) summarize the ideas behind these mineral deposit density models and provide individual estimates for twenty-seven combinations of deposit types and control locations. Many of the specially selected areas they describe provide standards to identify what should be considered high estimates of number of undiscovered deposits in most situations. Thus, many published mineral-deposit densities provide guides that suggest upper limits to estimates but are not necessarily useful in providing estimation guides for more likely situations.

Research of burst hazard of rocks on Rasyumchorrsk mineral deposit by application of special technical means

2019 ◽  
Vol 8 (30) ◽  
pp. 98-105
Author(s):  
M.I. Rasskazov ◽  
◽  
A.V. Gladyr ◽  
A.V. Tereshkin ◽  
D.I. Thoi ◽  
...  
Keyword(s):  
Mineral Deposit ◽  
Burst Hazard

Summary terrane, mineral deposit, and metallogenic belt maps of the Russian Far East, Alaska, and the Canadian Cordillera

1998 ◽  
Author(s):  
Warren J. Nokleberg ◽  
Timothy D. West ◽  
Kenneth M. Dawson ◽  
Vladimir I. Shpikerman ◽  
Thomas K. Bundtzen ◽  
...  
Keyword(s):  
Russian Far East ◽  
Far East ◽  
Mineral Deposit ◽  
Canadian Cordillera ◽  
Metallogenic Belt ◽  
The Russian Far East

Mineral deposit and metallogenic belt maps of the Russian Far East, Alaska, and the Canadian cordillera

1997 ◽  
Author(s):  
Warren J. Nokleberg ◽  
Timothy D. West ◽  
Kenneth M. Dawson ◽  
Vladimir I. Shpikerman ◽  
Thomas K. Bundtzen ◽  
...  
Keyword(s):  
Russian Far East ◽  
Far East ◽  
Mineral Deposit ◽  
Canadian Cordillera ◽  
Metallogenic Belt ◽  
The Russian Far East

New metallogenic model of telescoped Eocene-Miocene Au-U epithermal mineral deposit in the Placer de Guadalupe district, Chihuahua, Mexico

2017 ◽  
Vol 91 ◽  
pp. 133-152 ◽  
Author(s):  
Gilles Levresse ◽  
Janet Villarreal-Fuentes ◽  
Angel F. Nieto-Samaniego ◽  
Paul Alexandre ◽  
Rodolfo Corona-Esquivel ◽  
...  
Keyword(s):  
Mineral Deposit ◽  
Metallogenic Model

Mineral exploration with 3-D controlled-source electromagnetic method: a synthetic study of Sukhoi Log gold deposit

2019 ◽  
Vol 219 (3) ◽  
pp. 1698-1716 ◽  
Author(s):  
M Malovichko ◽  
A V Tarasov ◽  
N Yavich ◽  
M S Zhdanov
Keyword(s):  
Finite Difference ◽  
Gold Deposit ◽  
Large Scale ◽  
Mineral Exploration ◽  
Mineral Deposit ◽  
Hydrocarbon Exploration ◽  
Contraction Operator ◽  
Inversion Algorithm ◽  
Controlled Source ◽  
Regularized Inversion

SUMMARY This paper presents a feasibility study of using the controlled-source frequency-domain electromagnetic (CSEM) method in mineral exploration. The method has been widely applied for offshore hydrocarbon exploration; however, nowadays this method is rarely used on land. In order to conduct this study, we have developed a fully parallelized forward modelling finite-difference (FD) code based on the iterative solver with contraction-operator preconditioner. The regularized inversion algorithm uses the Gauss–Newton method to minimize the Tikhonov parametric functional with the Laplacian-type stabilizer. A 3-D parallel inversion code, based on the iterative finite-difference solver with the contraction-operator preconditioner, has been evaluated for the solution of the large-scale inverse problems. Using the computer simulation for a synthetic model of Sukhoi Log gold deposit, we have compared the CSEM method with the conventional direct current sounding and the CSEM survey with a single remote transmitter. Our results suggest that, a properly designed electromagnetic survey together with modern 3-D inversion could provide detailed information about the geoelectrical structure of the mineral deposit.

Geochemistry of cobalt, nickel, chromium, and vanadium in the sediments of the estuary and open Gulf of St. Lawrence

1979 ◽  
Vol 16 (6) ◽  
pp. 1196-1209 ◽  
Author(s):  
D. H. Loring
Keyword(s):  
Mineral Deposit ◽  
Source Rocks ◽  
Anthropogenic Sources ◽  
Terrestrial Organic Matter ◽  
Lawrence Estuary ◽  
Fine Grained ◽  
Hydrous Oxides ◽  
High Concentrations ◽  
St Lawrence Estuary ◽  
Local Anomalies

Total Co (3–22 ppm), Ni (4–160 ppm), V (4–168 ppm), and Cr (8–241 ppm) concentrations vary regionally and with textural differences in the sediments of the St. Lawrence estuary and Gulf of St. Lawrence. They are, except for local anomalies, at or near natural levels relative to their source rocks and other marine sediments.Chemical partition and mineralogical analyses indicate that small but biochemically significant quantities (2–24%) of the total element concentrations are potentially available to the biota and are most likely held by fine-grained organic material, hydrous iron oxides, and ion exchange positions in the sediments. In the upper estuary, nondetrital Ni, Cr, and V supplied from natural and anthropogenic (Cr) sources are apparently preferentially scavenged from solution by terrestrial organic matter and hydrous oxides and concentrated in fine-grained sediments deposited below the turbidity maximum. In the lower estuary, the fine-grained sediments are relatively enriched in nondetrital V supplied from anthropogenic sources in the Saguenay system. Elsewhere the sedimentation intensities of the nondetrital elemental contributions have remained relatively constant with fluctuations in total sediment intensity.Seventy-six to 98% of the total Co, Ni, Cr, and V is not, however, available to the biota, but held in various sulphide, oxide, and silicate minerals. The host minerals have accumulated at the same rate as other fine-grained detrital material except for some local anomalies. In the upper estuary, detrital V concentrations are highest in the sands as an apparent result of an enrichment of ilmenite and titaniferous magnetite from a nearby mineral deposit. In the open gulf, relatively high concentrations of Ni, Cr, and V occur in sediments from the Bay of Islands, Newfoundland, and probably result from the seaward dispersal of detrital Ni, Cr, and V bearing minerals from nearby ultrabasic rocks.

A stand-alone Co mineral deposit in northeastern Hunan Province, South China: Its timing, origin of ore fluids and metal Co, and geodynamic setting

2018 ◽  
Vol 92 ◽  
pp. 42-60 ◽  
Author(s):  
Shaohao Zou ◽  
Fenghui Zou ◽  
Juntao Ning ◽  
Teng Deng ◽  
Deshui Yu ◽  
...  
Keyword(s):  
South China ◽  
Mineral Deposit ◽  
Hunan Province ◽  
Geodynamic Setting
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