Reflectance of the surface of a material is its effectiveness in reflecting radiant energy.

As I understood you would like to know whether there will be any difference between the surface reflectance of deformed and un-deformed surface

I f we are talking about a rock/ mineral  surface

the reflectance is dependst upon the the aggregate of minerals, their composition and amount of alteration/ deformation.

to measure exact difference instead of single reflectance measurement, spectral reflectance curves are more useful.

Hi Ijaz,

There are two different types of deformation:

1. The brittle deformation

2. The ductile deformation

Both the brittle and ductile deformation alone, as well as a combination of both, cause significant changes in the reflectance of a rock. Striking is the relationship between crystallization and deformation and the period during which these processes take place.

In a simple example, I would like to show how the ductile deformation of an undeformed graphite crystal in a marble can influence the intensity of the reflectance (reflected light digital image, width 0,5 mm) . The first image shows an undeformed graphite crystal embedded in a marble. The second image shows a ductile deformed graphite crystal of similar size, which appears darker as a result of the flaring of its sheets. The reflectance of a crystal or rock is substantially reduced by newly formed inclusions, grain size reduction, grain boundary multiplication and cavities.

Best regards,

Guenter

Dear IJAZ,

If applicable, you might want to put your question outside the microscopic level.

Rocks optical reflectance, tectonic influenced or not, depends on an array of characteristics such as irradiance of the light source, frequency and incidence angle varying with changing surface.  

For remote sensing applications attempting to model reflectance of rocks with varying relief  the BRDF and approximating models (Lambertian and others) are established since a while.This with a chaniging degree of suitability.

As the above examples of the previous contributions illustrate, applicability depends of course also on the scale to which the model shall be applied and the corresponding underlying model data available such as relief (DTM), erosion of bedrock cover, surface alterations, homogeneity of (classified) rock with and without tectonic alterations and atmospheric conditions during survey.Data sources are multispectral aerial surveys and satellite data, and usually combined with ground truth surveys with for example field spectrometers operating in the relevant bandwidth and resolution of the remotely sensed data. This needs auxiliary information such as meteorological data (for models of large vertical extent) and multi-temporal data integration etc.Some RS software packages have corresponding modules for the data processing. This approach however requires some insight into the available data's characteristics and suitability for the subsequent data processing and integration.Regards,Harald

I am not geologist,sorry

rgrastogi