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Research Article
ScienceAsia 30 (2004): 269-278 |doi: 10.2306/scienceasia1513-1874.2004.30.269
Lineaments Analysis Determined from Landsat Data
Implication for Tectonic Features and Mineral
Occurrences in Northern Loei Area, NE Thailand
Kachentra Neawsuparp,1,2* and Punya Charusiri1*
ABSTRACT: Digitally enhanced Landsat TM5 images along with geological and mineral occurrence information
were applied for investigation of lineament systems in the northern Loei area, NE Thailand. Prior to visual
interpretation, enhancement process was performed, including contrast stretching, edge enhancing and
directional filter analyses. Image interpretation indicates 3 major lineament systems: north-south, northwestsoutheast,
and northeast-southwest trending lineaments. The north-south trending lineaments are inferred
to be closely related to substantial, nearly parallel thrust faults and fold axes, which, to some extent, follow
the major and regional structural feature. Combination of major lineaments with pre-existing structural
geology is useful for delineating tectonic features of the area. The overlay of mineral occurrences onto the
lineament map indicates that the mineralizations have good coincidence not only with the shorter in
northeast-southwest lineaments intersected by the longer in northwest-southeast lineaments but also with
the intrusive igneous bodies. The mineral occurrences are mostly concentrated in areas of high-density
lineaments. Our preliminary analysis also indicates that lineaments from Landsat interpretation fit fairly well
with those of the geologic data. It is concluded that lineaments observed from enhanced spaced-borne
images can be used to comprehend the tectonic setting and to select the target areas for follow-up mineral
exploration.
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1 Department of Geology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
2 Geological Resources Conservation and Management Division, Department of Mineral Resources,
Bangkok, 10400, Thailand.
* Corresponding author, E-mail: kachen@dmr.go.th and cpunya @chula.ac.th
Received 25 Feb 2004,
Accepted 23 Jun 2004
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