Wu, Zizhuo; Chen, Gen; Jiang, Zongyang; Zheng, Youye; Chen, Xin; Gao, Shunbao (2025) Diagnostic implications of shortwave-thermal infrared characteristics of typical alteration minerals for mineral exploration in continental volcanic arcs: A case study of the Zhalong Cu-Sn polymetallic deposit, Tibet. Ore Geology Reviews, 184. 106760 doi:10.1016/j.oregeorev.2025.106760
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Diagnostic implications of shortwave-thermal infrared characteristics of typical alteration minerals for mineral exploration in continental volcanic arcs: A case study of the Zhalong Cu-Sn polymetallic deposit, Tibet | ||
| Journal | Ore Geology Reviews | ||
| Authors | Wu, Zizhuo | Author | |
| Chen, Gen | Author | ||
| Jiang, Zongyang | Author | ||
| Zheng, Youye | Author | ||
| Chen, Xin | Author | ||
| Gao, Shunbao | Author | ||
| Year | 2025 | Volume | < 184 > |
| Page(s) | 106760 | ||
| URL | |||
| DOI | doi:https://doi.org/10.1016/j.oregeorev.2025.106760Search in ResearchGate | ||
| Generate Citation Formats | |||
| Classification | Not set | LoC | Not set |
| Mindat Ref. ID | 18636842 | Long-form Identifier | mindat:1:5:18636842:4 |
| GUID | 0 | ||
| Full Reference | Wu, Zizhuo; Chen, Gen; Jiang, Zongyang; Zheng, Youye; Chen, Xin; Gao, Shunbao (2025) Diagnostic implications of shortwave-thermal infrared characteristics of typical alteration minerals for mineral exploration in continental volcanic arcs: A case study of the Zhalong Cu-Sn polymetallic deposit, Tibet. Ore Geology Reviews, 184. 106760 doi:10.1016/j.oregeorev.2025.106760 | ||
| Plain Text | Wu, Zizhuo; Chen, Gen; Jiang, Zongyang; Zheng, Youye; Chen, Xin; Gao, Shunbao (2025) Diagnostic implications of shortwave-thermal infrared characteristics of typical alteration minerals for mineral exploration in continental volcanic arcs: A case study of the Zhalong Cu-Sn polymetallic deposit, Tibet. Ore Geology Reviews, 184. 106760 doi:10.1016/j.oregeorev.2025.106760 | ||
| In | Link this record to the correct parent record (if possible) | ||
| Abstract/Notes | Shortwave infrared (SWIR) and thermal infrared (TIR) spectroscopy have emerged as pivotal tools for reconstructing metallogenic environments and extracting exploration indicators in complex hydrothermal systems, owing to their rapid, non-destructive, and high-precision capabilities in identifying alteration minerals. The sensitivity of SWIR to hydroxyl-bearing minerals (e.g., white mica, kaolinite) is complementary to the accurate identification of silicate minerals (e.g., quartz, feldspar) by TIR, enabling synergistic characterization of alteration zoning and mineralization processes—particularly suited for multiscale investigations of hydrothermal deposits. The Zhalong Cu-Sn polymetallic deposit in western Gangdese, a newly discovered volcanic-hydrothermal system, presents significant exploration challenges due to ambiguous alteration zoning, unclear metallogenic mechanisms, extensive surficial cover, and concealed orebody localization. These characteristics render it an ideal testbed for SWIR-TIR integration. Through spectroscopic analysis of 656 surface samples and spectral parameter extraction, this study aims to (1) decipher alteration assemblage zoning patterns, (2) establish quantitative correlations between spectral parameters and mineralization environments, and (3) provide scientific guidelines for subsequent exploration. Key findings include: (1) Alteration zoning exhibits a concentric sequence: quartz + white mica → white mica + feldspar + kaolinite → kaolinite + montmorillonite + feldspar → chlorite + montmorillonite + feldspar + white mica, with ore bodies predominantly hosted in the strong silicified quartz + white mica zone; (2) Diagnostic spectral scalars—white mica Al-OH absorption wavelength position (Pos2200 < 2206 nm), absorption depth (Dep2200 > 0.3), and crystallinity (SWIR-IC > 1.5); kaolinite crystallinity (SWIR-KC > 1.1); quartz TIR absorption features (Pos9300 < 9280 nm, Dep8625 > 0.12); and plagioclase Na/Ca ratio (Hig9600/Hig9900 < 1.3)—collectively indicate high-temperature, relatively acidic mineralization environments and serve as robust exploration vectors; (3) Integration of spectral scalar anomalies and alteration zoning, combined with metallogenic patterns of analogous deposits (e.g., Balong, Sinongduo) in the Gangdese, reveals three hydrothermal mineralization centers at Zhalong deposit. Shallow Cu mineralization is structurally controlled by volcanic conduits, while deeper Cu-Sn polymetallic orebodies likely exist. This study demonstrates how SWIR-TIR synergy enables multi-parameter spectral scalar extraction as efficient exploration proxies, overcoming the limitations of single-technique approaches in hydrothermal system analysis. The methodology establishes a replicable framework for exploration strategy optimization and target delineation in comparable deposits, offering novel insights for mineral prospecting of Ag-Pb-Zn-Sn-Au-Cu deposit systems in western Gangdese and even global continental volcanic arcs. | ||
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