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Spectra Used in Figures

Metadata Updated: September 5, 2023

This dataset contains reflectance and transmission spectra of unexpanded and expanded vermiculite ore, and handpicked flakes of phlogopite, hydrobiotite, and vermiculite. These samples were collected from mines near Enoree, South Carolina; Libby, Montana; Louisa, Virginia; Palabora, Llano, Texas; and South Africa. Spectra are identified as either reflectance or transmission in the alphanumeric file names and correlate to specpr record numbers designated in the manuscript figures in which they are shown. These transmission spectra were converted to absorbance in many of the figures. Spectra of talc, fibrous richterite amphibole, and serpentine are from well characterized samples from Feiser Mine, Ruby Mountains, Montana; Libby, Montana; and a NIOSH chrysotile standard (CH29) respectively. The talc sample is described in the U.S. Geological Survey Spectral Library (Kokaly and others, 2017). Some vermiculite samples were K-exchanged to facilitate spectral comparisons.

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 September 5, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date September 5, 2023
Publisher U.S. Geological Survey
Identifier USGS:58797a45e4b0847d353f4044
Data Last Modified 20200929
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 3acc9fc3-3d38-413a-94dd-2939c6541f25
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -128.7597656235,23.684373489276,-62.490234376141,49.922653763102
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash f3d9aa7fe428fe980dc77d8ca77e43736cfc81d3faed075d9da65dfaae1a5942
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -128.7597656235, 23.684373489276, -128.7597656235, 49.922653763102, -62.490234376141, 49.922653763102, -62.490234376141, 23.684373489276, -128.7597656235, 23.684373489276}

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