| 赵玉梅,刘磊,周军,苏春乾.新疆乌什塔拉地区遥感、化探、地质综合找矿研究[J].地质找矿论丛,2016,31(1):135-141 |
| 新疆乌什塔拉地区遥感、化探、地质综合找矿研究 |
| Mineral prospecting based on integration of remote sensing, geochemical and geological data in Wushitala, Xinjiang |
| 投稿时间：2015-01-20 |
| DOI：10.6053/j.issn.1001-1412.2016.01.018 |
| 中文关键词: 乌什塔拉地区 遥感 矿化蚀变信息提取 多元信息找矿 天山成矿带 新疆 |
| 英文关键词:Wushitala area remote sensing mineralization/alteration information extraction multi-information prospecting Tianshan metallogenic belt Xinjiang |
| 基金项目:国家自然科学基金项目(编号:41402288)和中央高校基本科研业务费专项资金(编号:2014G1271060)资助。 |
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| 中文摘要: |
| 新疆乌什塔拉地区位于中亚天山成矿带的东南部,该成矿带上已发现众多矿床。在乌什塔拉地区开展地质矿产调查时,为快速确定找矿靶区,以遥感技术为先导,利用ETM+自然彩色合成、最小噪声分离等方法解译岩体、断层;之后对ETM+数据采用掩膜技术剔除干扰后,利用主成分分析法提取矿化蚀变信息;并将地质、化探、遥感等多元信息叠合进行综合分析。结果表明,利用主成分分析法提取的蚀变信息与化探异常、岩体、断层吻合较好,蚀变信息在工作区西北部、北部(喀拉塔格附近)及南部(阿拉塔格附近)具有面状、带状分布特征,而在工作区西南部、中部(阿勒格乌拉西)及东南部(扎合布拉格北沟附近)等地具有线状特征。经综合分析、筛选,共圈定了19处找矿靶区,对其中5处重点部位进行野外检查,发现利用主成分分析法提取的蚀变异常多由岩脉、断层、夕卡岩化、黏土化、褐铁矿化等引起。对蚀变带取样化学分析,确定了金、铜、铁矿化点3处。 |
| 英文摘要: |
| Wushitala area, Xinjiang is situated in the southeast Central Asian Tianshan metallogenic belt. Many ore deposits have been discovered in the area. During the geology and mineral resources survey remote sensing techniques were used first, such as ETM+ natural color synthesis and minimum noise separation etc. by which intrusive bodies and faults can be interpreted, and masking technique by which negative influence on ETM+ data eliminated, and principal component analysis (PCA) by which the mineralization/alteration information extracted. Then the geological, geochemical and remote sensing data are overprinted and comprehensively analyzed. The result showed that the alteration information extracted by PCA were well coincided with geochemical anomalies, intrusive bodies and faults. Moreover, the alteration information were distributed in areal and belt pattern in northwest, north (Kalatage) and south (Alatage) of the area , and in linear pattern in southwest, central (West Alegewula) and southeast (Zhahebulagebeigou). Nineteen exploration targets were located by the synthetic analysis. Through ground inspection on five targets the alteration anomalies extracted by PCA were closely related with dykes, faults, skarnization, argillation, limonitization. According to the laboratory analysis of samples from the alteration zones three occurrences of gold, copper and iron were discovered. |
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