Characteristics of Remote Sensing Information and Principles of Geological Interpretation

Remote sensing information has the following characteristics (Zhu,1994; Yang, 1995):

(1) Multi-source synthesis: Remote sensing information is multi-source, which is the comprehensive information of underground (shallow and deep), ground (rock, soil, vegetation, water body), lithosphere, hydrosphere, biosphere and atmosphere in a certain area.

(2) Macroscopicity: Remote sensing information has the advantages of broad vision and comprehensive generalization. Every "point" information (value) of remote sensing information is comprehensive information representing a certain area "group" on the ground.

(3) Spectral limitations: Remote sensing information is the spectral information of ground objects. Whether it is aerial remote sensing, space remote sensing, holographic photography or multi-band photographic scanning, the spectral information obtained is only "fragments" in the spectrum of ground objects, which has certain limitations.

(4) Multi-interpretation: The multi-source synthesis of information sources determines the multi-source causes of remote sensing information. The variability of remote sensing information with time (season) and the variability of sensor performance and information resolution make the interpretation of remote sensing information multi-interpretation.

Interpretation generally follows the following principles:

(1) From known to unknown, from easy to difficult, from simple to complex, step by step.

(2) the whole first, then the local. That is to say, first explain the regional tectonic framework, determine the main faults and large folds, and divide the large rock areas. , and then explain the details, supplement secondary faults and small folds, and subdivide lithologic units.

(3) First structure, then lithology, or combination of structure and lithology. Make the explanation work clear and orderly.

(4) Basic geology first, then mineral geology, that is, after the interpretation of basic geology is completed, the ore-bearing properties of rocks, strata, structures and alteration zones are analyzed.