Regional structures related to mineral deposit clusters in western United States, based on magnetic and gravity interpretations
Hildenbrand, T.; Berger, B.
published: Jan 1, 2003
ArtNo. ESP136000800051, Price: 19.00 €
We explore the utility of regional gravity and magnetic data as an aid in understanding the distribution of large Mesozoic and Cenozoic ore deposits (primarily epithermal and pluton-related precious- and base-metal deposits and sediment-hosted gold deposits) in the western United States Cordillera. To investigate the regional controls on mineral deposits, broad relationships between geophysical features and the structural geology important to the localization of deposits are discussed first. Then specific deposit clusters are considered by addressing possible deep-seated, regional controls on ore deposition. In order to investigate the usefulness of geophysical data to determine regional structures and their relationship to the distribution of ore deposits in the western United States, we adopt several working hypotheses that have appeared frequently in the literature. Implicit throughout this study are the following: (1 ) regional deep-seated fault systems can localize igneous activity, major ore deposits and ore districts; (2) these fault systems are susceptible to repeated reactivation through geologic time; and (3) intersecting fault systems are especially favorable for ore deposits.