Imperial College London

Dr Philippa J Mason

Faculty of EngineeringDepartment of Earth Science & Engineering

Senior Teaching Fellow
 
 
 
//

Contact

 

+44 (0)20 7594 6528p.j.mason Website

 
 
//

Location

 

G31Royal School of MinesSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{D'Arcy:2018:10.1016/j.rse.2018.07.013,
author = {D'Arcy, M and Mason, PJ and Roda-Boluda, DC and Whittaker, AC and Lewis, JMT and Najorka, J},
doi = {10.1016/j.rse.2018.07.013},
journal = {Remote Sensing of Environment},
pages = {401--414},
title = {Alluvial fan surface ages recorded by Landsat-8 imagery in Owens Valley, California},
url = {http://dx.doi.org/10.1016/j.rse.2018.07.013},
volume = {216},
year = {2018}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Alluvial fans are important depositional landforms that offer valuable records of terrestrial sedimentation history if their surfaces can be mapped and dated accurately. Unfortunately, as this often depends on detailed field mapping and intensive absolute dating techniques, it can be a challenging, expensive and time-consuming exercise. In this study, we demonstrate that quantitative information about the ages of alluvial fan surfaces in Owens Valley, California, is recorded by Landsat-8 multispectral satellite imagery. We show that systematic changes in the wavelength-dependent brightness of fan surfaces occur gradually over a timescale of ~100kyr in this semi-arid setting, and are highly correlated with known deposit ages. Using spectro-radiometry and X-ray diffraction analysis of sediment samples collected in the field, we interpret that surface reflectance evolves primarily in response to the in-situ production of secondary illite and iron oxide by weathering in this landscape. Furthermore, we demonstrate that first-order predictions of absolute fan surface age can be derived from multispectral imagery when an initial age calibration is available. These findings suggest that multispectral imagery, such as Landsat data, can be used (i) for preliminary mapping of alluvial fans prior to detailed field work and before choosing sampling sites for conventional dating techniques, and (ii) to extend age models to un-dated neighbouring surfaces with equivalent physical properties, once an age-brightness calibration has been established.
AU - D'Arcy,M
AU - Mason,PJ
AU - Roda-Boluda,DC
AU - Whittaker,AC
AU - Lewis,JMT
AU - Najorka,J
DO - 10.1016/j.rse.2018.07.013
EP - 414
PY - 2018///
SN - 0034-4257
SP - 401
TI - Alluvial fan surface ages recorded by Landsat-8 imagery in Owens Valley, California
T2 - Remote Sensing of Environment
UR - http://dx.doi.org/10.1016/j.rse.2018.07.013
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000445990100028&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR - http://hdl.handle.net/10044/1/69550
VL - 216
ER -