The Application of Electrical Geophysics to Gold Exploration at Mt Wright, North Queensland

2001 ◽  
Vol 2001 (1) ◽  
pp. 1-4
Author(s):  
Derek Webb ◽  
Barry James
Keyword(s):  
Gold Exploration ◽  
Electrical Geophysics

Multivariate Analysis of Stream Sediment Geochemical Data for Gold Exploration in Delijan, Iran

2018 ◽  
Vol 5 (2) ◽  
pp. 325-334
Author(s):  
Farid Javadnejad ◽  
◽  
Javad EskandariShahraki ◽  
Sanaz Khoubani ◽  
Elham Kalantari ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Stream Sediment ◽  
Geochemical Data ◽  
Gold Exploration

Mise‐a‐la‐masse survey for an auriferous sulfide deposit

Geophysics ◽  
2001 ◽  
Vol 66 (1) ◽  
pp. 70-77 ◽  
Author(s):  
B. B. Bhattacharya ◽  
Dinesh Gupta ◽  
Buddhadeb Banerjee ◽  
Shalivahan
Keyword(s):  
Massive Sulfide ◽  
Sulfide Deposit ◽  
Sulfide Mineralization ◽  
Gold Exploration ◽  
Copper Mineralization ◽  
Geophysical Surveys ◽  
Sulfide Content ◽  
Equipotential Map ◽  
Massive Sulfide Mineralization ◽  
Gold Bearing

A mise‐a‐la‐masse survey was carried out in Bhukia area, Banswara district, Rajasthan, India for auriferous sulfide occurrences. This area was originally surveyed for copper mineralization. Exploratory drilling, however, proved it to be economically not viable. The area was reopened for geophysical surveys when grab samples indicated the presence of gold. Initial geophysical surveys for copper mineralization showed electromagnetic, induced polarization, and resistivity anomalies. At first, one borehole was drilled for gold exploration on the basis of initial geophysical surveys. It encountered massive sulfide mineralization in association with gold. Borehole logging and a mise‐a‐la‐masse survey were carried out in this borehole. Three further boreholes drilled on the basis of the mise‐a‐la‐masse results encountered massive sulfide mineralization in association with gold. One of the three boreholes, 100 m from the first borehole along strike, was used for another set of mise‐a‐la‐masse measurements. A composite equipotential map was prepared using the results of mise‐a‐la‐masse results of both the boreholes. The equipotential contours show a north‐northwest‐south‐southeast trend of mineralization. The boreholes drilled on the basis of the mise‐a‐la‐masse results have delineated a strike length of more than 500 m of gold‐bearing sulfide mineralization. The sulfide content ranges from 10 to 40% and gold concentration ranges from 2 to 6 ppm. The dip and plunge of the lode, as anticipated from the mise‐a‐la‐masse results, are toward the west and north, respectively. Mise‐a‐la‐masse surveys are continuing in the adjoining areas.

scholarly journals Significance of ferruginous pisoliths and interface sampling for gold exploration in the covered terrains

2021 ◽  
pp. 106794
Author(s):  
Walid Salama ◽  
Ravi Anand ◽  
Louise Schoneveld ◽  
Ryan Noble ◽  
Jordan Rogers
Keyword(s):  
Gold Exploration

Resolving Optimum Magnetic Signatures for Drill-Hole Targeting in Gold Exploration – A Case Study for Mbudzane in Gwanda, Zimbabwe

2013 ◽  
Vol 3 (1) ◽  
pp. 9-29
Author(s):  
Dumisani John Hlatywayo ◽  
Emmanuel Sakala
Keyword(s):  
Drill Hole ◽  
Magnetic Survey ◽  
Gold Exploration ◽  
Rock Formations ◽  
Induced Polarisation ◽  
Line Spacing ◽  
Magnetic Signatures ◽  
Ground Magnetic ◽  
Tilt Derivative ◽  
Resistivity Image

Optimum magnetic signatures for drill-hole targeting in gold exploration in Mbudzane were resolved from induced polarisation-resistivity and magnetic anomalies. Total magnetic field and a gold-in-soil map showed the area is magnetically quiet with high anomalous values along old gold workings. Induced polarisation was carried out along a grid for lines of 500m length, 50m separation and a baseline oriented at 330˚. The survey comprised a gradient array and three real sections. The magnetic survey was conducted over the same grid as the induced polarisation. Stations were set at 5m intervals for a line spacing of 50m. The results show intense anomalies that suggest different degrees of magnetic alteration and a set of conjugate lineaments and faults that possibly control the mineralisation in Mbudzane. The tilt derivative of the reduced-to-pole image resolves the separation between anomalies, giving information on the faulting. High chargeability is confined to the sheared and silicified mafic schist. The gradient resistivity image revealed contact between rock formations. Real section IP shows coincident low chargeability – low resistivity anomalies close to the surface. Chargeability intensity increases with depth, suggesting incipient development of disseminated sulphide replacement zones. A strong correlation between ground magnetic inferred contacts and apparent resistivity-chargeability anomalies forms the basis for suggesting a new drill-hole targeting. They dictate both the depth and angle at which drilling should be carried out. These results should be applicable to any region where drill-hole targeting in gold exploration may be required.

Empirical Geologic Modeling in Intrusion-related Gold Exploration An Example from the Buffalo Valley Area, Northern Nevada

SEG Discovery ◽  
1997 ◽  
pp. 1-13
Author(s):  
J.A. KIZIS ◽  
S.R. BRUFF ◽  
E.M. CRIST ◽  
D.C. MOUGH ◽  
R.G. VAUGHAN
Keyword(s):  
Gold Exploration ◽  
Northern Nevada ◽  
Valley Area

Identifying structural complexity in aeromagnetic data: An image analysis approach to greenfields gold exploration

2012 ◽  
Vol 46 ◽  
pp. 47-59 ◽  
Author(s):  
Eun-Jung Holden ◽  
Jason C. Wong ◽  
Peter Kovesi ◽  
Daniel Wedge ◽  
Mike Dentith ◽  
...  
Keyword(s):  
Image Analysis ◽  
Structural Complexity ◽  
Analysis Approach ◽  
Aeromagnetic Data ◽  
Gold Exploration

Improving Understanding of Peatland Hydrogeology Using Electrical Geophysics

2001 ◽  
Author(s):  
Lee D. Slater ◽  
Andrew Reeve ◽  
Danney Glaser
Keyword(s):  
Electrical Geophysics
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