scholarly journals Geophysical and geochemical data from the area of the Pebble Cu-Au-Mo porphyry deposit, southwestern Alaska: Contributions to assessment techniques for concealed mineral resources

Data Series ◽  
10.3133/ds608 ◽  
2011 ◽  
pp. i-46 ◽  
Author(s):  
E.D. Anderson ◽  
S.M. Smith ◽  
S.A. Giles ◽  
Matthew Granitto ◽  
R.G. Eppinger ◽  
...  
Keyword(s):  
Mineral Resources ◽  
Geochemical Data ◽  
Porphyry Deposit ◽  
Assessment Techniques ◽  
Southwestern Alaska

Factor-Universal Kriging Model in the Geochemical Combination Anomaly

2013 ◽  
Vol 807-809 ◽  
pp. 2139-2146
Author(s):  
Meng Xue Cao ◽  
Lai Jun Lu ◽  
Guo Qiang Chen
Keyword(s):  
Factor Analysis ◽  
Spatial Distribution ◽  
Spatial Structure ◽  
Spatial Variation ◽  
Mineral Resources ◽  
Kriging Model ◽  
Universal Kriging ◽  
Geochemical Data ◽  
Geochemical Elements ◽  
Anomaly Analysis

Geochemical elements combination anomaly is one of three basic theories in the mineral resources prediction, considering the autocorrelation and structure of elements spatial distribution, comprehensive spatial structure simplified for Factor analysis and spatial variation metric thought for Universal Kriging, mixing together two methods constructs the so-called Factor-Universal Kriging model, for combination anomaly analysis of regional geochemical data. This article emphatically introduces the principle and application of the model.

Study on Geochemical Characteristics of the Sb Polymetallic District in Da Zhuang of Kai Yuan County in Yunnan Province

2013 ◽  
Vol 807-809 ◽  
pp. 2184-2187
Author(s):  
Jiao Jiao Chen ◽  
Ying Shu Li ◽  
Yi Ke Zhang ◽  
Da Qing He ◽  
Dong Ming Yang
Keyword(s):  
Yunnan Province ◽  
Mineral Resources ◽  
Mining Area ◽  
Geochemical Characteristics ◽  
Geochemical Data ◽  
Geological Investigation ◽  
Ore Deposit ◽  
Structure Characteristics ◽  
Yunnan Area ◽  
Favorable Conditions

Southeast Yunnan Area is an Important Nonferrous Metals Mineral Resources Base in Yunnan Province, with Good Metallogenic Conditions. the Structure Characteristics of Kai Yuan Da Zhuang Mining Area is more Complex, with Favorable Conditions for Mineralization. Based on Detailed Geological Investigation, Combined with the Geochemical Data and Geological Setting, Deposit Features of Da Zhuang Antimony Ore Deposit and Summarizes Geochemical Characteristics, that is to Study the Genesis of this Deposit and is to Predict the Mining Ore.

scholarly journals Implication Of Geological Domains Data For Modeling And Estimating Resources From Nkout Iron Deposit (South-Cameroun)

2021 ◽  
Author(s):  
Boroh Andre William ◽  
Sore-Gamo Koutou Yvan ◽  
Ayiwouo Ngounouno Mohamed ◽  
Gbambié Mbowou Isaac Bertrand ◽  
Ngounouno Ismaïla
Keyword(s):  
Mineral Resources ◽  
Point Clouds ◽  
Geochemical Data ◽  
Iron Deposit ◽  
Global Estimate ◽  
Rich Domain ◽  
Southern Cameroon ◽  
The Rich ◽  
Geochemical Analyses ◽  
Domain Block

Abstract This paper is devoted to determine whether the addition of geological information can improve the resource estimate of mineral resources. The geochemical data used come from 116 drill holes in the Nkout East iron deposit in southern Cameroon. These geochemical data are modeled on Surpac and Isatis softwares to represent the 3D geochemical distribution of iron in the deposit. Statistical analysis and then a variographic study is performed to study the spatial variability of iron. Estimation domains were defined based on the results of geological and geochemical analyses. Four domains were determined. These domains are in particular, the saprolitic domain; the poor domain or fresh rocks such as amphibolites, granites and gneisses; the rich domain or oxidized rocks (BIF) and the metasediment domain. Block modeling of the deposit is performed to estimate the resource. The grade of each block was estimated by using ordinary kriging and composites from each domain. This study also consisted of comparing two types of estimate, notably the domain estimate and the global estimate. The cross-validation made it possible to authenticate the obtained models. From this comparison, the domain estimation brings more precision the global estimate precisely on the error analysis while if we take into account the point clouds of the predicted and estimated values, the estimation by geochemical modelling provides the best results.

scholarly journals Implication of geological domains data for modeling and estimating resources from Nkout iron deposit (South-Cameroun)

2021 ◽  
Vol 57 (1) ◽  
pp. 1-17
Author(s):  
A.W. Boroh ◽  
K.Y. Sore-Gamo ◽  
Ngounouno Ayiwouo ◽  
Mbowou Gbambie ◽  
I. Ngounouno
Keyword(s):  
Geochemical Modeling ◽  
Mineral Resources ◽  
Point Clouds ◽  
Geochemical Data ◽  
Iron Deposit ◽  
Global Estimate ◽  
Rich Domain ◽  
The Rich ◽  
Geochemical Analyses ◽  
Domain Block

This paper is devoted to determining whether the addition of geological information can improve the resource estimate of mineral resources. The geochemical data used come from 116 drill holes in the Nkout East iron deposit in southern Cameroon. These geochemical data are modeled on Surpac and Isatis softwares to represent the 3D geochemical distribution of iron in the deposit. Statistical analysis and then a variographic study is performed to study the spatial variability of iron. Estimation domains were defined based on the results of geological and geochemical analyses. Four domains were determined. These domains are the saprolitic domain in particular; the poor domain or fresh rocks such as amphibolites, granites, and gneisses; the rich domain or oxidized rocks (BIF) and the metasediment domain. Block modeling of the deposit is performed to estimate the resource. The grade of each block was estimated by using ordinary kriging and composites from each domain. This study also consisted of comparing two types of estimate, notably the domain estimate and the global estimate. The cross-validation made it possible to authenticate the obtained models. From this comparison, the domain estimation brings more precision the global estimate precisely on the error analysis while if we take into account the point clouds of the predicted and estimated values, the estimation by geochemical modeling provides the best results.

RECENT EXPLORATION DEVELOPMENTS IN THE NGALIA BASIN, NORTHERN TERRITORY

1983 ◽  
Vol 23 (1) ◽  
pp. 182
Author(s):  
D. D. Benbow ◽  
J. Davidson ◽  
J. Mulready
Keyword(s):  
Source Rock ◽  
Gas Flow ◽  
Mineral Resources ◽  
Petroleum Exploration ◽  
Seismic Survey ◽  
Gravity Survey ◽  
Geochemical Data ◽  
Surface Mapping ◽  
Northern Margin ◽  
Geophysical Surveys

Petroleum exploration of the Ngalia Basin commenced with the Pacific-American Oil Company's seismic and gravity survey in 1964, followed by geological and geophysical surveys by the Bureau of Mineral Resources (BMR) between 1967 and 1978, and then Magellan's Ngalia seismic and gravity survey in 1971.After a ten year break, exploration resumed with the drilling of the Davis-1 well by a consortium of Australian companies which farmed-in to Magellan's Ngalia Basin Permit (OP165). The well was drilled on the flank of a large east-west trending anticlinal dome outlined by surface mapping and limited seismic coverage, and located near the northern margin of the basin. The section penetrated in the well consists of 1134 m of Carboniferous-Devonian sediments unconformably overlying 479 m of probable Cambro-Ordovician marine sediments, which in turn unconformably overlie approximately 246 m of marine ?Adelaidean sediments, including a basal sequence of dark grey marine shale. Source rock analysis indicates that this latter section may provide a significant source rock potential for the basin. A small gas flow was observed during the course of the well, which was air-drilled to a total depth of 1899 m, bottoming in metamorphics which are tentatively correlated with the Pre-Cambrian Patmungala Beds (?Arunta Block). The current exploration effort is now aimed at:more deeply buried structures in the Naburula Fault Trough, in the western half of the basin, andsub-surface extensions of the Walbiri-Bloodwood Fold Zone, in the eastern half.In both cases a more extensive section of marine Cambro-Ordovician age rocks is anticipated, and the limited geochemical data available suggest that these sediments should lie within the oil window.The Newhaven-Mt Allan Seismic Survey, consisting of 344 km of 12-fold vibroseis coverage was shot in these areas in November-December, 1981, in an attempt to define prospects and leads for evaluation by additional drilling over the next three years. The structures mapped to date include reverse faulted blocks with salt-involvement in the Newhaven area to the west, and "sled-runner" thrusts with a plane of décollement in salt in the Mt Allan area to the east.

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