Citation: | DAI Jingjing, WANG Denghong, DAI Hongzhang, LIU Lijun, WU Yanan. 2017. Geological mapping and ore-prospecting study using remote sensing technology in Jiajika area of Western Sichuan Province[J]. Geology in China, 44(2): 389-398. doi: 10.12029/gc20170213 |
The Jiajika ore deposit has become one of the areas with the richest Li resources in China and even in the world; nevertheless, remote sensing research on Li resources remains very insufficient. In this paper, geological mapping and oreprospecting studies in Jiajika area were conducted using remote sensing technology. Spectral library of typical rocks and minerals collected in this area was built, and spectral characteristics of rocks and minerals including biotite schist, grenatite schist, grenatite cordierite schist, hornstone, granite, spodumene-bearing pegmatite, pegmatite without spodumene, quartz vein, feldspar, spodumene monocrystal, biotite, and aquamarine were analyzed. Then geological mapping and ore prospecting were studied based on image processing and interpretation of middle spatial resolution remote sensing data LandSat 8 and high spatial resolution remote sensing data Geoeye-1. The results indicate that remote sensing technology is instructive for geological mapping and ore prediction of Jiajiaka type lithium ores and is likely to be a good indicator before geological study.
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The distribution of samples collected in the field
Color composition image of 752 bands of Landsat 8 and the result of interpretation
Color composition image of 432 bands of Geoeye-1 and the result of interpretation
The correction of geological boundary (Green lines in image a represent stratigraphic boundary in original geological map, and red dotted lines represent the corrected stratigraphic boundary; purple lines in image a represent vein in original geological map, and purple dotted lines represent the corrected vein boundary)
White spot in remote sensing image (White spot in image a is spodumene-bearing pegmatite, white spot in image b is schist)
The interpretation image of pegmatite boulder and ore-prospecting areas in Jiajika