MEASURED EFFECTS OF DESERT VARNISH ON THE MIDINFRARED SPECTRA OF WEATHERED ROCKS AS AN AID TO TIMS IMAGERY INTERPRETATION

被引：14

作者：

RIVARD, B ^{[1
]}

PETROY, SB ^{[1
]}

MILLER, JR ^{[1
]}

机构：

[1] LABSPHERE INC, N SUTTON, NH 03260 USA

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 1993年 / 31卷 / 01期

关键词：

D O I：

10.1109/36.210468

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The thermal infrared spectral properties (7-12 mum) of natural rock surfaces from Silver Lake, CA, are investigated. Although the reflectance of weathered rocks is largely a function of the quartz content in rocks, the presence of desert varnish (clay coating) on rocks reduces the reflectance and spectral contrast with features unique to the rock spectra persisting if varnish is thin. Thick varnish has a spectrum with a reflectance peak near 9.6 mum, due to clays, and resembles the spectra of clay-rich playa surfaces. Comparison of laboratory reflectance spectra for varnish and weathered rock samples, with TIMS emissivity spectra for Silver Lake, suggest that TIMS signatures for felsic rocks are dominated by weathered rock and rock debris. In contrast, it is likely that varnish plays an important role in the TIMS signatures of mafic rocks.

引用

页码：284 / 291

页数：8

共 35 条

[1] INFRARED-SPECTROSCOPY (2.3-20-MU-M) FOR THE GEOLOGICAL INTERPRETATION OF REMOTELY-SENSED MULTISPECTRAL THERMAL INFRARED DATA [J].