- Copyright © 2003 Society of Exploration Geophysicists
The meteorite impact process is quite a remarkable natural phenomenon. When it occurs in a sedimentary basin, it can create a trap-generating structure (rim and central uplift) and reservoir rocks (ejecta piles and breccia infill), both at the same time.
The buried meteorite impact structures/craters can be very good petroleum prospects. Steen River in Alberta, Viewfield in Saskatchewan, Ames Hole in Oklahoma, and Red Wing Creek in North Dakota are examples of oil-and-gas fields producing from buried impact structures.
Satellite images and aerial photos can be used to identify surface and shallow buried impact craters. However, the subtlety of impact crater geology makes it rather difficult to discover and study deeply buried impact structures.
GEDCO's processing of the high-resolution aeromagnetic (HRAM) data has revealed an oval-shaped magnetic anomaly at Jackpine Creek, British Columbia. Geologic and geophysical evidence, presented below, is consistent with interpretation of this anomaly as the magnetic signature of a buried meteorite impact crater.
The Wapiti HRAM survey was flown by Fugro Airborne Surveys with 600 × 1800-m line spacing in a smooth “drape” mode at an average height of 200 m above the ground. Standard preprocessing provided the total magnetic field grid with 200-m cell size. This grid was Wiener filtered to suppress extreme high-frequency noise and then reduced to the pole to compensate for the local inclination and declination of the Earth's magnetic field. The resultant total magnetic field …