NONEXCLUSIVE HIGH-DEFINITION AEROMAGNETIC DATA

NORTH-CENTRAL NEVADA

Since 1993 EDCON-PRJ has been flying high-definition aeromagnetic surveys in north-central Nevada. Most of the surveys were flown with a line spacing of 200 meters, draped 150 meters above terrain. The data are being sold by 7½-minute quadrangles at a sliding scale cost per line-mile. Quantitative geological-geophysical interpretations of most quadrangles have been completed and are sold at a fixed price per quadrangle.

Following are the acquisition specifications of each survey, deliverable products, and price lists. The mileage within each quadrangle is shown on the accompanying index map.

SPECIFICATIONS

North-Central Nevada Survey

Survey Size: 19,669 line miles

Line Spacing: 1/8-mile (200 m)

Line Direction: Northeast-southwest

Tie Lines: ½-mile, northwest-southeast

Elevation: Approximately 500 feet, draped

Southeast Carlin Trend Survey

Survey Size: 24,285 line miles

Line Spacing: 1/8-mile (200 m)

Line Direction: Northeast-southwest

Tie Lines: ½-mile, northwest-southeast

Elevation: Approximately 500 feet, draped

Getchell Survey (reprocessed public domain data)

Survey Size: 1,096 line miles

Line Spacing: 1/8-mile (200 m)

Line Direction: NW-SE

Tie Lines: 2½-mile, northeast-southwest

Elevation: Approximately 500 feet but varies widely

Battle Mountain Survey

Survey Size: Approximately 8,767 line miles

Line Spacing: 1/8-mile (200 m)

Line Direction: East-West

Tie Lines: 1-mile, north-south

Elevation: Approximately 500 feet, draped

NOTE: A small portion of the survey, indicated on the index map by a dashed line, has a line spacing of a ½ mile. All other specifications are the same.

Crescent Valley - Shoshone Range Survey

Total Survey Size: 13,475 miles

Northwest Portion

Flight lines : N45°E, 1/8-mile spacing

Tie lines: N45°W, ¼-mile spacing

Elevation: 500 feet above terrain

Magnetometer: High-sensitivity, Cesium-vapor

Sampling rate: 0.25 seconds

Southeast Portion

Flight lines: N45°W, ¼-mile spacing

Tie LInes: N45°E, 1-mile spacing

Elevation: 350 feet above terrain

Magnetometer: High-sensitivity, Cesium-vapor

Sampling rate: 0.25 seconds

Roberts Mountains Survey

Survey Size: Approximately 14,358 line miles

Line Spacing: 1/8-mile

Line Direction: Northeast-Southwest

Tie Lines: ½-mile, northwest-southeast

Elevation: Approximately 500 feet, draped

NOTE: Over the part of Denay Valley, flight lines and tie lines are ½-mile spacing.

DELIVERABLES

Data

• Total Magnetic Intensity contour map (IGRF-removed) with flight line locations (1:24,000 scale, on mylar)

• Reduced-to-Pole Total Magnetic Intensity (1:24,000 scale, on paper, in color)

• Purchasers of the entire survey will receive 1:100,000 scale versions of the TMI (no flight lines) and the RTP of the TMI

• Archive diskette or CD of raw and corrected magnetics, diurnal, altimeter, and fiducial information

Interpretations

• Quantitative magnetic interpretation overlay showing outlines of causative bodies, magnetic structures, and other interpretive features

• High-graded interpretation overlay showing significant interpreted features, their geologic interpretation, and relationship to mineral occurrences

• Report discussing the interpreted features and relationships to mineralization