Crustal Architecture Beneath the Southern Midcontinent (USA) -- Data Grids and 3D Geophysical Models: Gravity and Magnetic Grids
Description
Regional geophysical data grid files provided in Grid eXchange File (GXF) format were used to study crustal architecture beneath the Southern Midcontinent (USA) by McCafferty and others (2019). The study covered a rectangular, multi-state area of 924 by 924 kilometers centered on Missouri, and a corresponding volume extending from the topographic surface to a depth of 50 kilometers below sea level. The observed geophysical data grids (Bouguer gravity anomaly and reduced-to-pole (RTP) aeromagnetic anomaly) were used in 3D inversions, and the calculated geophysical data grids were produced by the inversions. All grids are sampled at a 2,000 by 2,000 meter grid interval. Missing data nodes are assigned a value of 1.000000E+38.
Two versions of each GXF file are provided: (1) a version with embeded map projection information for use with Geosoft Oasis montaj and the free Geosoft viewer software and (2) a version without map projection information (filenames ending in NoProj.gxf) for use with ArcMap and QGIS. An ArcMap projection file, which contains the missing projection information, is also provided.
Resources
| Name |
Format |
Description |
Link |
|
55 |
The metadata original format |
https://data.usgs.gov/datacatalog/metadata/USGS.5cf14f94e4b056af3664e806.xml |
|
55 |
Landing page for access to the data |
https://doi.org/10.5066/P9GDWR0C |
Tags
- indiana
- topography
- gravimeter-measurement
- missouri
- geophysics
- magnetic-susceptibility-analysis
- kentucky
- tennessee
- magnetometer-measurement
- mississippi
- gravimetric-methods
- aeromagnetic-surveying
- magnetic-field-earth
- kansas
- geospatial-datasets
- arkansas
- geoscientificinformation
- usgs-5cf14f94e4b056af3664e806
- magnetic-susceptibility
- bouguer-anomaly
- iowa
- oklahoma
- crust-earth
- scientific-interpretation
- gravitational-field-earth
- illinois
- bulk-density