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ASTER(先进星载热发射和反射辐射仪)已被广泛应用于岩性识别研究中,但在国内综合采用多种方法增强并识别镁铁—超镁铁岩体信息的研究较少。以甘肃北山辉铜山地区为研究区,综合应用比值法、最小噪声分离和镁铁岩指数等方法处理研究区ASTER数据,以突出辉铜山地区镁铁—超镁铁岩信息。将处理结果与地质图对比、综合分析,圈定了11处疑似辉长岩体,对其中9处进行野外验证,全部与遥感分析结果吻合,证明了结果的有效性。该方法可以应用于西部地区镁铁—超镁铁岩体识别工作中。
ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) has been widely used in lithology identification research. However, there are few studies on how to enhance and identify the mafic-ultramafic information by a variety of methods in China. Taking Huichangshan area in Beishan, Gansu Province as the research area, the ASTER data of the study area are comprehensively applied by the ratio method, the minimum noise separation and the mafic index to highlight the mafic-ultramafic rocks information in Huichangshan area. The results are compared with the geological map. Based on the comprehensive analysis, 11 suspected gabbro bodies are delineated, and nine of them are field verified, all of them agree with the results of remote sensing analysis, which proves the validity of the result. The method can be applied to the identification of mafic-ultramafic rocks in western China.