Hydrothermal Alteration Revealed by Apatite Luminescence and Chemistry: A Potential Indicator Mineral for Exploring Covered Porphyry Copper Deposits

2016 ◽  
Vol 111 (6) ◽  
pp. 1397-1410 ◽  
Author(s):  
Farhad Bouzari ◽  
Craig J.R. Hart ◽  
Thomas Bissig ◽  
Shaun Barker
Keyword(s):  
Hydrothermal Alteration ◽  
Porphyry Copper ◽  
Porphyry Copper Deposits ◽  
Copper Deposits ◽  
Potential Indicator ◽  
Indicator Mineral

The Origin of Sheet Fractures in the Galore Creek Copper Deposits, British Columbia

1971 ◽  
Vol 8 (6) ◽  
pp. 704-711 ◽  
Author(s):  
Donald G. Allen
Keyword(s):  
British Columbia ◽  
Hydrothermal Alteration ◽  
Porphyry Copper ◽  
Surface Feature ◽  
Porphyry Copper Deposits ◽  
Volume Increase ◽  
Copper Deposits ◽  
Feature Characteristic

A surface feature characteristic of the Galore Creek copper deposits is a set of well-developed closely-spaced fractures, termed sheet fractures. The formation of these fractures is attributed to the widespread presence of anhydrite, a hydrothermal alteration mineral associated with copper. The fractures apparently developed as a consequence of the volume increase due to hydration of the anhydrite to gypsum by meteoric water.The Galore Creek deposits have many characteristics of porphyry copper deposits, in many of which anhydrite or gypsum has been reported. Anhydrite may be responsible for the development of sheet fractures elsewhere.

scholarly journals Application of Dirichlet Process and Support Vector Machine Techniques for Mapping Alteration Zones Associated with Porphyry Copper Deposit Using ASTER Remote Sensing Imagery

Minerals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1235
Author(s):  
Mastoureh Yousefi ◽  
Seyed Hasan Tabatabaei ◽  
Reyhaneh Rikhtehgaran ◽  
Amin Beiranvand Pour ◽  
Biswajeet Pradhan
Keyword(s):  
Hydrothermal Alteration ◽  
Porphyry Copper ◽  
Copper Deposit ◽  
Porphyry Copper Deposit ◽  
Training Data ◽  
Support Vector ◽  
Porphyry Copper Deposits ◽  
Copper Deposits ◽  
Alteration Zones ◽  
Hydrothermal Alteration Zones

The application of machine learning (ML) algorithms for processing remote sensing data is momentous, particularly for mapping hydrothermal alteration zones associated with porphyry copper deposits. The unsupervised Dirichlet Process (DP) and the supervised Support Vector Machine (SVM) techniques can be executed for mapping hydrothermal alteration zones associated with porphyry copper deposits. The main objective of this investigation is to practice an algorithm that can accurately model the best training data as input for supervised methods such as SVM. For this purpose, the Zefreh porphyry copper deposit located in the Urumieh-Dokhtar Magmatic Arc (UDMA) of central Iran was selected and used as training data. Initially, using ASTER data, different alteration zones of the Zefreh porphyry copper deposit were detected by Band Ratio, Relative Band Depth (RBD), Linear Spectral Unmixing (LSU), Spectral Feature Fitting (SFF), and Orthogonal Subspace Projection (OSP) techniques. Then, using the DP method, the exact extent of each alteration was determined. Finally, the detected alterations were used as training data to identify similar alteration zones in full scene of ASTER using SVM and Spectral Angle Mapper (SAM) methods. Several high potential zones were identified in the study area. Field surveys and laboratory analysis were used to validate the image processing results. This investigation demonstrates that the application of the SVM algorithm for mapping hydrothermal alteration zones associated with porphyry copper deposits is broadly applicable to ASTER data and can be used for prospectivity mapping in many metallogenic provinces around the world.

Hydrothermal alteration in Puerto Rican porphyry copper deposits

1973 ◽  
Vol 68 (8) ◽  
pp. 1329-1334 ◽  
Author(s):  
Dennis P. Cox ◽  
Richard R. Larson ◽  
Richard B. Tripp
Keyword(s):  
Puerto Rican ◽  
Hydrothermal Alteration ◽  
Porphyry Copper ◽  
Porphyry Copper Deposits ◽  
Copper Deposits

COMPARISON OF REE SIGNATURES OF PRE- AND SYN-MINERALIZATION PLUTONS ASSOCIATED WITH PORPHYRY COPPER DEPOSITS OF NW MEXICO

2018 ◽  
Author(s):  
C. Santillana Villa ◽  
◽  
M. Valencia Moreno ◽  
L. Ochoa Landín ◽  
R. Del Rio Salas ◽  
...  
Keyword(s):  
Porphyry Copper ◽  
Porphyry Copper Deposits ◽  
Copper Deposits ◽  
Nw Mexico
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