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Overview

basement domain map
Basement domains of conterminous United States and Alaska. From USGS Data Series 898, doi:10.3133/ds898.

Scientific Issue and Relevance

Large regional (national) resource evaluations can be based on near-surface geology and geologic history and/or on affinity and architecture of the underlying crust. The nature and history of underlying basement is most applicable to evaluating metallogenic provinces (geographic area characterized by a particular assemblage of mineral deposits) and the regional-scale mineralizing processes that operate at lithospheric scales (crust and upper mantle), notably iron oxide-copper-gold (IOGC) and rift-related systems. There are no existing maps of basement affinity and architecture for the entire U.S., so crustal characteristics were generally unavailable for use in previous USGS Mineral Resources Program national mineral resource assessments.

Research Activities

The project's first objective was the development of a U.S. basement terrane map based on basement tectonic processes, the first of its kind for the U.S. The second objective was to investigate 1.7 and 1.4-Ga A-type granites (formed unrelated to collisional tectonics and/or under anhydrous conditions) in relation to the process by which cratons (stable part of continent, typically forms central mass) are formed from juvenile crust and mineralization events.

Products

Report

Lund, Karen, Box, S.E., Holm-Denoma, C.S., San Juan, C.A., Blakely, R.J., Saltus, R.W., Anderson, E.D., and DeWitt, E.H., 2015, Basement domain map of the conterminous United States and Alaska: U.S. Geological Survey Data Series 898, 41 p., https://doi.org/10.3133/ds898.

Spatial Data for USGS Data Series 898

Abstracts

Barineau, C.I., Holm-Denoma, C.S., and Tull, J., 2012, Three phases of Taconic accretionary orogenesis in the southern Appalachians: Geological Society of America Abstracts with Programs, Vol. 44, No. 7, p. 173. View Barineau 2012 GSA abstract.

Barineau, C.I., Holm-Denoma, C.S., Tull, J., Mueller, P.A., Black, D.L., and Sagul, D.A., 2013, A synthesis of recent contributions in southern Appalachians mapping, geochemistry and geochronology of Laurentian margin rocks: Part I - Latest Neoproterozoic through Ordovician: Geological Society of America Abstracts with Programs, Vol. 45, No. 7, p. 809. View Barineau 2013 GSA abstract 1.

Barineau, C.I., Mueller, P.A., Holm-Denoma, C.S., Tull, J., Sagul, D.A., Black, D.L., and Pazel, J.M., 2013, A synthesis of recent contributions in southern Appalachians mapping, geochemistry and geochronology of Laurentian margin rocks: Part II - Silurian through Permian: Geological Society of America Abstracts with Programs, Vol. 45, No. 7, p. 809. View Barineau 2013 GSA abstract 2.

Box, S.E., Ayuso, R.A., Bradley, D.C., Haeussler, P.J., Saltus, R.W., Karl, S.M., Jones, J.V., III, Dumoulin, J.A., Graham, G.E., todd, E., and Lease, R.O., 2012, A geologic transect across the western Alaska Range: Alaska Miners Association 2012 Annual Convention Abstracts, p. 24-25.

Box, S.E., Karl, S.M., Jones, J.V., III, Lease, R.O., Bradley, D.C., Haeussler, P.J., Graham, G., Saltus, R.W., and Hults, C.P., 2013, Detrital zircon constraints on sources, age of deformation and localization of mineral deposits of Kahiltna Basin, south-central Alaska: Geological Society of America Abstracts with Programs, Vol. 45, No. 7, p. 77. View Box 2013 GSA abstract.

Holm-Denoma, C., Southworth, S., and Merschat, A., 2013, Neoproterozoic unroofing history and crustal structure of southern Appalachian Grenville basement from detrital zircon ages and morphology: Geological Society of America Abstracts with Programs, Vol. 45, No. 7, p. 809. View Holm-Denoma 2013 GSA abstract.

Holm-Denoma, C.S., Southworth, S., and Merschat, A., 2012, Detrital zircon geochronology of Neoproterozoic-Cambrian strata of the Appalachian Blue Ridge: Mt. Rogers, VA area: Geological Society of America Abstracts with Programs, Vol. 44, No. 7, p. 172. View Holm-Denoma 2012 GSA abstract.

Lund, K., and Aleinikoff, J.N., 2012, Zigzag geometry of Neoproterozoic-Early Progerozoic Cordilleran rift margin: Implications for mineral deposits, Canada to Nevada: Geological Society of America Abstracts with Programs, Vol. 44, No. 7, p. 294. View Lund 2012 GSA abstract.

Moscati, R.J., Premo, W.R., and DeWitt, E.H., 2012, SHRIMP-RG U-Pb geochronology and trace element geochemistry of zircon from Proterozoic granitic plutons in the Sawatch Range, Colorado, USA: Geological Society of America Abstracts with Programs, Vol. 44, No. 7, p. 234. View Moscati 2012 GSA abstract.

Premo, W.R., Moscati, R.J., and DeWitt, E.H., 2012, A refinement of the timing for Proterozoic crustal growth in westernmost Colorado from SHRIMP-TG U-Pb zircon geochronology: Geological Society of America Abstracts with Programs, Vol. 44, No. 7, p. 234. View Premo 2012 GSA abstract.

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