{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,13]],"date-time":"2026-02-13T13:23:45Z","timestamp":1770989025429,"version":"3.50.1"},"reference-count":80,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2021,12,14]],"date-time":"2021-12-14T00:00:00Z","timestamp":1639440000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["41102205"],"award-info":[{"award-number":["41102205"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Remote sensing (RS) of alteration zones and anomalies can provide information that is useful for geological prospecting and exploration. RS is an effective method for porphyry copper mineral exploration and prospecting prediction. More specifically, the Advanced Spaceborne Thermal Emission and Reflection radiometer (ASTER) data, which include 14 spectral channels from visible light to thermal infrared, are useful in such cases. This study uses visible-shortwave infrared and thermal infrared ASTER data together with surface material spectra from the Duolong porphyry copper ore district to construct an RS-based alteration zonation model of the deposit. In this study, an RS alteration zoning model is established based on ground-spectral alteration zoning results. The methods include PCA (Principal Component Analysis), Ratio, and Slope methods. The information obtained by each method is different. RS-based alteration zonation is developed based on the intersection of maps, resultant from the different methods for extracting information related to different minerals. The alteration zonation information extracted from ASTER RS data is consistent with geological observations. Using information from the RS-based model, we mapped the alteration minerals and zones of the Duolong ore district, thereby identifying prospecting target areas of the deposit.<\/jats:p>","DOI":"10.3390\/rs13245073","type":"journal-article","created":{"date-parts":[[2021,12,14]],"date-time":"2021-12-14T22:06:10Z","timestamp":1639519570000},"page":"5073","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["A Remote-Sensing-Based Alteration Zonation Model of the Duolong Porphyry Copper Ore District, Tibet"],"prefix":"10.3390","volume":"13","author":[{"given":"Fojun","family":"Yao","sequence":"first","affiliation":[{"name":"Key Laboratory of Metallogeny and Resources Assessment, Institute of Mineral Resources Chinese Academy of Geological Sciences, Beijing 100037, China"}]},{"given":"Xingwang","family":"Xu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Mineral Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China"}]},{"given":"Jianmin","family":"Yang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Metallogeny and Resources Assessment, Institute of Mineral Resources Chinese Academy of Geological Sciences, Beijing 100037, China"}]},{"given":"Xinxia","family":"Geng","sequence":"additional","affiliation":[{"name":"Key Laboratory of Metallogeny and Resources Assessment, Institute of Mineral Resources Chinese Academy of Geological Sciences, Beijing 100037, China"}]}],"member":"1968","published-online":{"date-parts":[[2021,12,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"713","DOI":"10.1130\/0091-7613(1977)5<713:MOHAIT>2.0.CO;2","article-title":"Mapping of hydrothermal alteration in the cuprite mining district, Nevada, using aircraft scanning images for the spectral region 0.46 to 2.36 mm","volume":"5","author":"Abrams","year":"1977","journal-title":"Geology"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"501","DOI":"10.1190\/1.1440721","article-title":"Spectral signatures of particulate minerals in the visible and near infrared","volume":"42","author":"Hunt","year":"1977","journal-title":"Geophysics"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1974","DOI":"10.1190\/1.1440951","article-title":"Near-infrared(1.3\u20132.4\u03bcm) spectra of alteration minerals potential for use in remote sensing","volume":"44","author":"Hunt","year":"1979","journal-title":"Geophysics"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1981","DOI":"10.1080\/014311698215108","article-title":"Techniques for enhancing the spectral response of hydrothermal alteratioin minerals in Thematic Mapper images of central Mexico","volume":"19","year":"1998","journal-title":"Int. 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