Airborne Gravity 2010 - Geoscience Australia

More documents

Recommendations

Info

Airborne Gravity 2010 An airborne gravity case study of the Podolsky Deposit, Sudbury Basin Introduction Elizabeth Baranyi 1 and Rob Ellis 2 1 Geosoft Inc. (Elizabeth.baranyi@geosoft.com) 2 Geosoft Inc. A high resolution airborne gravity dataset covering the Podolsky Property, located on the northeast rim of the Sudbury Basin, has been used as the input for 3-Dimensional (3D) gravity inversion. An initial inversion without any project-specific constraints was followed up with an inversion incorporating information gleaned from interpretation of coincident magnetic data coverage over the property and from a priori knowledge of the geology of the area. The second inversion was deemed to provide a more reliable estimate of the bulk density distribution for the region. The results indicated that the high resolution airborne gravity data could be used for mineral exploration applications in this environment. Geology The Sudbury Basin in Ontario, Canada, is a Paleoproterozoic geologic structure that is host to a large number of Ni-Cu-PGE sulphide deposits (Pye et al., 1984). Sudbury and Norilsk, Russia, are the two largest sulphide nickel camps in the world. The deposits of the Sudbury Basin have been mined for more than 130 years, and the region continues to be a target region for active exploration. The Sudbury Igneous Complex (SIC) structure is a deformed and thrusted multi-ring impact basin with horizontal dimensions of approximately 60 by 27 km, with the long axis oriented in the east-northeast direction (Figure 1). This complex hosts numerous Ni-Cu-PGE sulphide deposits within portions of the impact melt that collected in traps, as well as in radiating offset dykes along the footwall rocks, and within fractured and brecciated footwall rocks. The Podolsky Property is being developed and explored by Quadra FNX Mining Ltd (http://www.quadrafnx.com) and is located on the northeast rim of the Sudbury Basin (Figure 1). The Podolsky Property hosts several copper-nickel-precious metal deposits including the Nickel Ramp Deposit. A 3D illustration of the known geological structure overlain with the Podolsky Property boundary is shown in Figure 2. In the work that is described in this paper, we utilised airborne gravity and LiDAR data that were acquired during a recent airborne gravity survey flown by Sander Geophysics (Sander and Ferguson, 2010). We applied gravity inversion methods to resolve structural detail that was not identified with the earlier gravity prospecting carried out in this region. A sequence of inversions was carried out, with location-specific constraints being added to improve the reliability and accuracy of the results. Constraints were derived from an interpretation of the airborne magnetic data acquired by Aeroquest in 2004. Drill hole geological information was also used to constrain the bulk density values in the inversion. The purpose of this work was to demonstrate the information that can be extracted from high resolution gravity data in relation to the potential for copper-nickel-precious metal mineralization in the Sudbury region. 13
Airborne Gravity 2010 Figure 1. Sudbury geology, mine sites, and location of the Podolsky Property. Figure 2. Perspective view of various geological features of the Podolsky structure with an overlay of the claim boundary. The mineralization is indicated with arrows. Data compiled by Quadra FNX Mining Ltd. The figure shows a region with approximate dimensions of 2 km (X, east-west), 4 km (Y, north-south), and 1.5 km (Z, vertical). 14
Page 1 and 2: Record Record 2010/23 2010/23 GeoCa
Page 3 and 4: Airborne Gravity 2010 Department of
Page 5 and 6: Airborne Gravity 2010 Acquisition a
Page 7 and 8: Airborne Gravity 2010 Images on the
Page 9 and 10: Airborne Gravity 2010 gravity gradi
Page 11 and 12: Airborne Gravity 2010 Figure 1. Det
Page 13 and 14: Airborne Gravity 2010 Even in the l
Page 15 and 16: Airborne Gravity 2010 In order to p
Page 17: Airborne Gravity 2010 Acknowledgeme
Page 21 and 22: Airborne Gravity 2010 Figure 4. Ima
Page 23 and 24: Airborne Gravity 2010 Gravity inver
Page 25 and 26: Airborne Gravity 2010 thanked for c
Page 27 and 28: Airborne Gravity 2010 The data used
Page 29 and 30: Airborne Gravity 2010 the full calc
Page 31 and 32: Airborne Gravity 2010 error on Gzz
Page 33 and 34: Airborne Gravity 2010 A Turnkey Air
Page 35 and 36: Airborne Gravity 2010 The prototype
Page 37 and 38: Airborne Gravity 2010 aircraft flig
Page 39 and 40: Airborne Gravity 2010 Figure 9. Sys
Page 41 and 42: Airborne Gravity 2010 References Jo
Page 43 and 44: Airborne Gravity 2010 Figure 1. Fli
Page 45 and 46: Airborne Gravity 2010 Cryostat The
Page 47 and 48: Airborne Gravity 2010 Figure 5. Com
Page 49 and 50: Airborne Gravity 2010 Abstract The
Page 51 and 52: Airborne Gravity 2010 That was 2004
Page 53 and 54: Airborne Gravity 2010 Geophysics to
Page 55 and 56: Airborne Gravity 2010 Operational i
Page 57 and 58: Airborne Gravity 2010 were reported
Page 59 and 60: Airborne Gravity 2010 � improving
Page 61 and 62: Airborne Gravity 2010 Figure 7. Geo
Page 63 and 64: Airborne Gravity, 2010 Satellite an
Page 65 and 66: Airborne Gravity, 2010 Modern satel
Page 67 and 68: Airborne Gravity, 2010 the use of a
Page 69 and 70:
Airborne Gravity, 2010 Table 1. Fit
Page 71 and 72:
Airborne Gravity, 2010 Scheinert et
Page 73 and 74:
Airborne Gravity, 2010 Hwang C, Guo
Page 75 and 76:
Airborne Gravity, 2010 Wolff M (196
Page 77 and 78:
Airborne Gravity 2010 introduces ma
Page 79 and 80:
Airborne Gravity 2010 Images of the
Page 81 and 82:
Airborne Gravity 2010 (a) Figure 4.
Page 83 and 84:
Airborne Gravity 2010 References Ba
Page 85 and 86:
Airborne Gravity 2010 quantitative
Page 87 and 88:
Airborne Gravity 2010 Figure 3. Exc
Page 89 and 90:
Airborne Gravity 2010 The inferred
Page 91 and 92:
Airborne Gravity 2010 Lane, R., and
Page 93 and 94:
Airborne Gravity 2010 New methods,
Page 95 and 96:
Airborne Gravity 2010 Tašárová,
Page 97 and 98:
Airborne Gravity 2010 triangulated
Page 99 and 100:
Airborne Gravity 2010 Inversion for
Page 101 and 102:
Airborne Gravity 2010 Reynisson, R.
Page 103 and 104:
Airborne Gravity 2010 gravity gradi
Page 105 and 106:
Airborne Gravity 2010 There are ver
Page 107 and 108:
Airborne Gravity 2010 Figure 3. Wee
Page 109 and 110:
Airborne Gravity 2010 The ultimate
Page 111 and 112:
Airborne Gravity 2010 Murphy, C.A.,
Page 113 and 114:
Airborne Gravity 2010 Figure 2. Reg
Page 115 and 116:
Airborne Gravity 2010 Figure 4. Ele
Page 117 and 118:
Airborne Gravity 2010 Analysis of t
Page 119 and 120:
Airborne Gravity 2010 Acknowledgmen
Page 121 and 122:
Airborne Gravity 2010 database was
Page 123 and 124:
Airborne Gravity 2010 Gravity surve
Page 125 and 126:
Airborne Gravity 2010 examined for
Page 127 and 128:
Airborne Gravity 2010 Figure 7. Pla
Page 129 and 130:
Airborne Gravity 2010 Barnett, C. T
Page 131 and 132:
Airborne Gravity 2010 forms of dens
Page 133 and 134:
Airborne Gravity 2010 128
Page 135 and 136:
Airborne Gravity 2010 Conclusions W
Page 137 and 138:
Airborne Gravity 2010 interpretatio
Page 139 and 140:
Airborne Gravity 2010 Figure 2. Gra
Page 141 and 142:
Airborne Gravity 2010 Changes in DE
Page 143 and 144:
Airborne Gravity 2010 � � 2 o p
Page 145 and 146:
Airborne Gravity 2010 (a) (b) Figur
Page 147 and 148:
Airborne Gravity 2010 Abstract Rece
Page 149 and 150:
Airborne Gravity 2010 By virtue of
Page 151 and 152:
Airborne Gravity 2010 Table 1. Tabl
Page 153 and 154:
Airborne Gravity 2010 Figure 3. Com
Page 155 and 156:
Airborne Gravity 2010 interpretatio
Page 157 and 158:
Airborne Gravity 2010 GT-1A and GT-
Page 159 and 160:
Airborne Gravity 2010 GT then under
Page 161 and 162:
Airborne Gravity 2010 Figure 4. Spe
Page 163 and 164:
Airborne Gravity 2010 Table 2. The
Page 165 and 166:
Airborne Gravity 2010 Figure 8. Pos
Page 167 and 168:
Airborne Gravity 2010 Lines accepte
Page 169 and 170:
Airborne Gravity 2010 GT-2A develop
Page 171 and 172:
Airborne Gravity 2010 Figure 14. Th
Page 173 and 174:
Airborne Gravity 2010 GT-2A develop
Page 175 and 176:
Airborne Gravity 2010 Future develo
Page 177 and 178:
Airborne Gravity 2010 Abstract Adva
Page 179 and 180:
Airborne Gravity 2010 Figure 2. Fir
Page 181 and 182:
Airborne Gravity 2010 Figure 4. Gra
Page 183 and 184:
Airborne Gravity 2010 Abstract The
Page 185 and 186:
Airborne Gravity 2010 Figure 3. Inv
Page 187 and 188:
Airborne Gravity 2010 Figure 9. Noi
Page 189 and 190:
Airborne Gravity 2010 regional DEMs
Page 191 and 192:
Airborne Gravity 2010 (a) (b) Figur
Page 193 and 194:
Airborne Gravity 2010 Using Solid E
Page 195 and 196:
Airborne Gravity 2010 The AGG3D inv
Page 197 and 198:
Airborne Gravity 2010 The lithologi
Page 199 and 200:
Airborne Gravity 2010 3D imaging of
Page 201 and 202:
Airborne Gravity 2010 Migration of
Page 203 and 204:
Airborne Gravity 2010 where is an o
Page 205 and 206:
Airborne Gravity 2010 wells have be
Page 207 and 208:
Airborne Gravity 2010 Figure 5. 2D
show all

Airborne Gravity 2010 - Geoscience Australia

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?