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Magnetic susceptibility measurements on hydrothermally altered rocks in the Silverton caldera, southwest Colorado

Metadata Updated: October 29, 2023

The U.S. Geological Survey (USGS) collected magnetic susceptibility measurements on rock outcrops to help understand causative sources of magnetic survey anomalies in the Silverton caldera region, southwest Colorado. A total of 1,400 measurements of magnetic susceptibility from 87 locations have been conducted on Paleogene volcanic and plutonic rocks that have been hydrothermally altered. Magnetic susceptibility measurements were taken using an SM30 handheld instrument manufactured by ZH Instruments. The measurements aid in understanding the geology and potential mineral resources in the Silverton caldera. Previously mapped lithologies and alteration assemblages were used to guide measurement locations. Multiple measurements were made at each location to help understand the magnetic susceptibility variation at each outcrop and sample lithology and alteration units were derived from existing USGS geologic maps noted in the supplemental information section of the metadata file. Sample locations were determined using handheld Global Position System units.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023
Publisher U.S. Geological Survey
Identifier USGS:624ce360d34e21f82765077c
Data Last Modified 20220802
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 2ab5fb8a-6ee2-42d4-9617-e09910da4b57
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -107.7771,37.7839,-107.5282,37.9663
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 4136b3e6244bfe3f8619a805498aef238effe9a58bf00048e01c6c1d7595ebe3
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -107.7771, 37.7839, -107.7771, 37.9663, -107.5282, 37.9663, -107.5282, 37.7839, -107.7771, 37.7839}

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