Detection of subtle basement faults with grawlty and magnetic data In the Alberta Basin, Canada: A data-use tutorial

摘要

Exploration for a wide range of mineral deposits is critically dependent on knowledge of the location and age of fractures and faults. Oil and gas fields in many sedimentary basins are distributed along fault-controlled linear trends, and fault identification is often used effectively for target-area selection in hydrocarbon exploration. Similarly, mineral deposits in various geologic settings are commonly associated with fluid-conducting faults. In the platformal, Phanerozoic Alberta sedimentary basin in western Canada (Figure 1), two fundamentally different types of crystalline-basement structure, formed in different tectonic conditions, are recognized (Lyatsky etal.,1999): 1) Archean and Early Proterozoic (Hudsonian and older) ductile orogenic structures, and 2) Middle Proterozoic to Recent cratonic ones.