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  3. Crustal Architecture Beneath the Southern Midcontinent (USA) -- Data Grids and 3D Geophysical Models
  4. Observed and calculated gravity and magnetic field grids for the southern midcontinent

Observed and calculated gravity and magnetic field grids for the southern midcontinent

Dates

Publication Date

Citation

Phillips, J.D., and McCafferty, A.E., 2019, Crustal Architecture Beneath the Southern Midcontinent (USA) -- Data Grids and 3D Geophysical Models: U.S. Geological Survey data release, https://doi.org/10.5066/P9GDWR0C.

Summary

Regional geophysical data grid files (provided in Grid eXchange File 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.

Contacts

Point of Contact :
Anne E McCafferty, Geology, Geophysics, and Geochemistry Science Center
Originator :
Jeffrey D Phillips, Anne E McCafferty
Metadata Contact :
Jeffrey D Phillips, Geology, Geophysics, and Geochemistry Science Center
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Geology, Geophysics, and Geochemistry Science Center
USGS Mission Area :
Energy and Minerals

Attached Files

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

CrustalArchitecture_GravMagGrids.xml
Original FGDC Metadata
View 		24 KB application/fgdc+xml
ObservedCalculatedRTPGravity.jpg
“Observed and calculated gravity and RTP magnetic fields” 		thumbnail 8.65 MB image/jpeg
AlbersConicalEqualArea.prj
“Projection file” 		451 Bytes text/plain
Bouguer.gxf
“Observed Bouguer gravity anomaly grid” 		3.14 MB application/gxf
BouguerNoProj.gxf
“Observed Bouguer gravity anomaly grid - no projection” 		3.14 MB application/gxf
CalculatedBouguer.gxf
“Calculated Bouguer gravity anomaly grid” 		3.14 MB application/gxf
CalculatedBouguerNoProj.gxf
“Calculated Bouguer gravity anomaly grid - no projection” 		3.14 MB application/gxf
CalculatedRTPMag.gxf
“Calculated reduced-to-pole magnetic anomaly grid” 		3.14 MB application/gxf
CalculatedRTPMagNoProj.gxf
“Calculated reduced-to-pole magnetic anomaly grid - no projection” 		3.14 MB application/gxf
RTPMag.gxf
“Observed reduced-to-pole magnetic anomaly grid” 		3.14 MB application/gxf
RTPMagNoProj.gxf
“Observed reduced-to-pole magnetic anomaly grid - no projection” 		3.14 MB application/gxf

Purpose

The grid files were used to study crustal architecture beneath the Southern Midcontinent (USA) related to transport of ore-forming fluids from the upper mantle to shallow-levels within the Precambrian crust.
Observed and calculated gravity and RTP magnetic fields
Observed and calculated gravity and RTP magnetic fields

Communities

  • USGS Data Release Products

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