New Insights into the Pulang Porphyry Copper Deposit in Southwest China: Indication of Alteration Minerals Detected Using ASTER and WorldView-3 Data
Abstract
:1. Introduction
2. Materials and Methods
2.1. Geological Setting
2.2. Remote Sensing Data and Characteristics
2.3. Pre-Processing of Remote Sensing Data
2.4. Hydrothermal Alteration Mineral Mapping Methods
2.4.1. Combination of the Band Ratio and Principal Component Analysis Methods
Band Ratio
Principal Component Analysis
2.4.2. Principal Component Analysis and Spectrum-Area Methods
3. Results
3.1. Quartz Alteration Mineral Extraction Using a Combination of the Band Ration and Principal Component Analysis Methods along with ASTER Data
3.2. Hydrothermal Alteration Minerals Extraction Using a Combination of the Principal Component Analysis and Spectrum-Area Methods along with WV-3 Data
4. Discussion
4.1. Indications of Alteration Minerals to Faults
4.2. Reconstruction of Alteration Zoning in Pulang Copper Deposit
4.3. Delineation of Prospecting Potential Areas
5. Conclusions
- (1)
- A new NE-trending normal fault passing through the northeast of Pulang PCD was discovered;
- (2)
- The alteration zoning of Pulang PCD was redivided. With two mineralization alteration centers located on both sides of the fault in Pulang PCD, and alteration zoning characteristics of the potassic-silicified, phyllic, and propylitic zones from the inside to the outside were identified in the Pulang PCD.
- (3)
- At the junction of the redivided potassic-silicification and phyllic zones of Pulang PCD, the favorable prospecting potential areas were delineated.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Sensors | Subsystem | Band Number | Spectral Range (μm) | Spatial Resolution (m) | Swath Width (km) |
---|---|---|---|---|---|
ASTER | VNIR | 1 | 0.520–0.600 | 15 | 60 |
2 | 0.630–0.690 | ||||
3 | 0.760–0.860 | ||||
SWIR | 4 | 1.600–1.700 | 30 | ||
5 | 2.145–2.185 | ||||
6 | 2.185–2.225 | ||||
7 | 2.235–2.285 | ||||
8 | 2.295–2.360 | ||||
9 | 2.360–2.430 | ||||
TIR | 10 | 8.125–8.475 | 90 | ||
11 | 8.475–8.825 | ||||
12 | 8.925–9.275 | ||||
13 | 10.25–10.95 | ||||
14 | 10.95–11.65 | ||||
WorldView-3 | VNIR | 1 | 0.400–0.450 | 1.24 | 13.2 |
2 | 0.450–0.510 | ||||
3 | 0.510–0.580 | ||||
4 | 0.585–0.625 | ||||
5 | 0.630–0.690 | ||||
6 | 0.705–0.745 | ||||
7 | 0.770–0.895 | ||||
8 | 0.860–1.040 | ||||
SWIR | 9 | 1.195–1.225 | 3.70 | ||
10 | 1.550–1.590 | ||||
11 | 1.640–1.680 | ||||
12 | 1.710–1.750 | ||||
13 | 2.145–2.185 | ||||
14 | 2.185–2.225 | ||||
15 | 2.235–2.285 | ||||
16 | 2.295–2.365 |
Eigenvector | QI | CI | MI |
---|---|---|---|
PC1 | 0.620732 | 0.586557 | 0.520233 |
PC2 | 0.725769 | −0.178896 | −0.664270 |
PC3 | 0.296565 | −0.789903 | 0.536752 |
Band 1 | Band 6 | Band 14 | Band 15 | |
---|---|---|---|---|
PC1 | 0.076493 | 0.165927 | 0.716485 | 0.673250 |
PC2 | −0.490367 | −0.845052 | 0.209057 | 0.041501 |
PC3 | −0.451157 | 0.364897 | −0.538114 | 0.611344 |
PC4 | 0.741719 | −0.353844 | −0.391634 | 0.413849 |
Band 3 | Band 5 | Band 13 | Band 16 | |
---|---|---|---|---|
PC1 | 0.171027 | 0.127509 | 0.839833 | 0.499170 |
PC2 | −0.816718 | −0.535923 | 0.172496 | 0.126504 |
PC3 | 0.122032 | −0.148993 | −0.503014 | 0.842548 |
PC4 | −0.537429 | 0.821176 | −0.109095 | 0.157921 |
Band 4 | Band 7 | Band 13 | Band 16 | |
---|---|---|---|---|
PC1 | 0.047524 | 0.995742 | 0.065523 | 0.044114 |
PC2 | −0.227916 | 0.085206 | −0.637216 | −0.731266 |
PC3 | −0.971539 | 0.029576 | 0.118582 | 0.202918 |
PC4 | 0.043679 | −0.019055 | −0.758684 | 0.649714 |
Field Verification Point No. | Detected Alteration Mineral | Alteration Zoning Divided by the Original Alteration Mapping | Petrographic Analysis Photo | Analysis of the Redivide Alteration Zoning |
---|---|---|---|---|
43 | Quartz | Potassic-silicification zone | | Potassic-silicification zone, abundant quartz, and K-feldspar content. |
47 | Sericite | Phyllic zone | | Phyllic zone, abundant sericite, and chalcopyrite content. |
51 | Chlorite, Epidote | Propylitic zone | | Propylitization zone, abundant chlorite, epidote, and actinolite content. |
59 | Sericite | Propylitic zone | | Phyllic zone, abundant sericite, and chalcopyrite content. |
82 | Quartz | Propylitic zone | | Potassic-silicification zone, abundant quartz, and chalcopyrite content. |
83 | | |||
85 | |
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Chen, Q.; Zhao, Z.; Zhou, J.; Zeng, M.; Xia, J.; Sun, T.; Zhao, X. New Insights into the Pulang Porphyry Copper Deposit in Southwest China: Indication of Alteration Minerals Detected Using ASTER and WorldView-3 Data. Remote Sens. 2021, 13, 2798. https://doi.org/10.3390/rs13142798
Chen Q, Zhao Z, Zhou J, Zeng M, Xia J, Sun T, Zhao X. New Insights into the Pulang Porphyry Copper Deposit in Southwest China: Indication of Alteration Minerals Detected Using ASTER and WorldView-3 Data. Remote Sensing. 2021; 13(14):2798. https://doi.org/10.3390/rs13142798
Chicago/Turabian StyleChen, Qi, Zhifang Zhao, Jiaxi Zhou, Min Zeng, Jisheng Xia, Tao Sun, and Xin Zhao. 2021. "New Insights into the Pulang Porphyry Copper Deposit in Southwest China: Indication of Alteration Minerals Detected Using ASTER and WorldView-3 Data" Remote Sensing 13, no. 14: 2798. https://doi.org/10.3390/rs13142798