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[Geological Data] Shapefiles of ancient and modern passive margins for the world

Dates

Publication Date
Time Period
2008

Citation

McCafferty, A.E., San Juan, C.A., Lawley, C.J.M., Graham, G.E., Gadd, M.G., Huston, D.L., Kelley, K.D., Paradis, S., Peter, J.M., and Czarnota, K., 2023, National-scale geophysical, geologic, and mineral resource data and grids for the United States, Canada, and Australia: Data in support of the tri-national Critical Minerals Mapping Initiative: U.S. Geological Survey data release, https://doi.org/10.5066/P970GDD5.

Summary

Two shapefiles mapping the locations of ancient and modern passive margin boundaries are presented. These data are a digital recreation of the work originally published by Bradley (2008). The ancient passive margin data were used as an evidential layer to map prospectivity for sediment-hosted Pb-Zn mineral systems (Lawley and others, 2022). The ancient passive margins dataset includes additional attributes related to the boundary's orogenic setting and history, the length of the boundary, its estimated lifespan, and its modern-day country location. Although only ancient passive margin boundaries were analyzed for the United States, Canada, and Australia for this study, boundaries for the world are included in the shapefile. The modern [...]

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Attached Files

Click on title to download individual files attached to this item.

GeologyAncientPassiveMargins_Australia.jpg
“Map of ancient passive margins-Australia”
thumbnail 3.62 MB image/jpeg
GeologyAncientPassiveMargins_USCanada.jpg
“Map of ancient passive margins-US and Canada”
thumbnail 13.75 MB image/jpeg
GeologyAncientPassiveMargins_Global.zip
“Shapefile of ancient passive margins for the world (after Bradley, 2008)”
19.45 KB application/zip
GeologyModernPassiveMargins_Global.zip
“Shapefile of modern passive margins for the world (after Bradley, 2008)”
23.44 KB application/zip
GeologyPassiveMargins_Global.gdb.zip
“Esri file geodatabase of passive margins”
89.96 KB application/zip

Purpose

The purpose of these data is to provide the approximate locations of ancient and modern passive margins across the globe as estimated by Bradley (2008). The ancient passive margin data can be used to understand paleo-tectonic evolution of the earth and related geologic processes and features. These data were used as input data for prospectivity models for basin-hosted Pb-Zn mineralization as part of the tri-national Critical Minerals Mapping Initiative, a collaboration between the national geological surveys of the United States (U.S. Geological Survey), Canada (Geological Survey of Canada) and Australia (Geoscience Australia). Modern passive margin location data from Bradley (2008), though not included in Pb-Zn modeling efforts, nonetheless provide information germane to understanding developing metallic and energy- (for example, petroleum) related deposits. References Bradley, D.C., 2008, Passive margins through earth history: Earth-Science Reviews, v. 91, no. 1-4, p. 1-26, https://doi.org/10.1016/j.earscirev.2008.08.001.

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