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Mapping variations in weight percent silica measured from multispectral thermal infrared imagery—Examples from the Hiller Mountains, Nevada, USA and Tres Virgenes-La Reforma, Baja California Sur, Mexico

Hook, Simon J. and Dmochowski, Jane E. and Howard, Keith A. and Rowan, Lawrence C. and Karlstrom, Karl E. and Stock, Joann M. (2005) Mapping variations in weight percent silica measured from multispectral thermal infrared imagery—Examples from the Hiller Mountains, Nevada, USA and Tres Virgenes-La Reforma, Baja California Sur, Mexico. Remote Sensing of Environment, 95 (3). pp. 273-289. ISSN 0034-4257. https://resolver.caltech.edu/CaltechAUTHORS:20140522-071230681

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Abstract

Remotely sensed multispectral thermal infrared (8–13 μm) images are increasingly being used to map variations in surface silicate mineralogy. These studies utilize the shift to longer wavelengths in the main spectral feature in minerals in this wavelength region (reststrahlen band) as the mineralogy changes from felsic to mafic. An approach is described for determining the amount of this shift and then using the shift with a reference curve, derived from laboratory data, to remotely determine the weight percent SiO_2 of the surface. The approach has broad applicability to many study areas and can also be fine-tuned to give greater accuracy in a particular study area if field samples are available. The approach was assessed using airborne multispectral thermal infrared images from the Hiller Mountains, Nevada, USA and the Tres Virgenes-La Reforma, Baja California Sur, Mexico. Results indicate the general approach slightly overestimates the weight percent SiO_2 of low silica rocks (e.g. basalt) and underestimates the weight percent SiO_2 of high silica rocks (e.g. granite). Fine tuning the general approach with measurements from field samples provided good results for both areas with errors in the recovered weight percent SiO_2 of a few percent. The map units identified by these techniques and traditional mapping at the Hiller Mountains demonstrate the continuity of the crystalline rocks from the Hiller Mountains southward to the White Hills supporting the idea that these ranges represent an essentially continuous footwall block below a regional detachment. Results from the Baja California data verify the most recent volcanism to be basaltic–andesite


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.rse.2004.11.020DOIArticle
http://www.sciencedirect.com/science/article/pii/S0034425704003682PublisherArticle
ORCID:
AuthorORCID
Stock, Joann M.0000-0003-4816-7865
Additional Information:© 2005 Elsevier Inc. Received 25 February 2004; received in revised form 18 November 2004; accepted 19 November 2004 Abstract. The research described in this paper was carried out in part at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration as part of the Earth Observing System Mission to Planet Earth Program. The work by Jane Dmochowski was funded by a NASA Earth System Science Fellowship Grant NGT5-30393. Numerous people have contributed to this work. In particular we would like to thank Ron Alley at JPL for help with atmospherically correcting the data and Mike Rymer and Kevin Mullins both at the USGS for reviewing the manuscript. Reference herein to any specific commercial product, process, or service by trade names, trademark, manufacturer or otherwise does not imply endorsement by the United States or the Jet Propulsion Laboratory, California Institute of Technology. Contribution number 9111, Division of Geological and Planetary Sciences, California Institute of Technology.
Group:Seismological Laboratory
Funders:
Funding AgencyGrant Number
NASA/JPL/CaltechUNSPECIFIED
NASA Earth System Science FellowshipNGT5-30393
Subject Keywords:Silica; Weight percent; Infrared imagery; MODIS/ASTER Airborne Simulator (MASTER)
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences9111
Issue or Number:3
Record Number:CaltechAUTHORS:20140522-071230681
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140522-071230681
Official Citation:Simon J. Hook, Jane E. Dmochowski, Keith A. Howard, Lawrence C. Rowan, Karl E. Karlstrom, Joann M. Stock, Mapping variations in weight percent silica measured from multispectral thermal infrared imagery—Examples from the Hiller Mountains, Nevada, USA and Tres Virgenes-La Reforma, Baja California Sur, Mexico, Remote Sensing of Environment, Volume 95, Issue 3, 15 April 2005, Pages 273-289, ISSN 0034-4257, http://dx.doi.org/10.1016/j.rse.2004.11.020. (http://www.sciencedirect.com/science/article/pii/S0034425704003682)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45876
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:27 May 2014 16:46
Last Modified:03 Oct 2019 06:37

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