Special Issue "Genesis of the Gold Deposits: News from Geology, Fluid Inclusions and Isotopes"

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Deposits".

Deadline for manuscript submissions: 30 October 2023 | Viewed by 971

Special Issue Editors

State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China
Interests: orogenic belt; gold deposits; epithermal transition; polymetallic mineralization; fluid inclusions
College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
Interests: porphyry-epithermal-skarn ore system; gold deposits; fluid inclusions

Special Issue Information

Dear Colleagues,

Gold continues to be a critical commodity with the supply–demand balance and is providing economic stability worldwide. Auriferous deposits have been classified in a number of ways over 40 years. Current genetic types of gold deposits mainly comprise the epithermal, carlin-type, porphyry and skarn, IOCG, and orogenic, with subordinate placer-type, laterite-type, VMS, and magmatic. They are comprehensively constrained by the deposit geology, tectonic setting, ore fluid temperature and salinity, and multiple systems of isotopes. These studies provide a good way of understanding ore-forming process and guiding mineral exploration.

This Special Issue aims at displaying recent achievements in the research of geology, fluid inclusions, isotopic geochemistry, and mineralogy of gold deposits. We welcome studies on the ore genesis of different ore systems, including ore fluids evolution, high-precision dating, ore-forming process, as well as ore-related magmatism, deformation, and related tectonics. We also solicit methodological studies employing in situ analytics that can reflect the ore-forming fluid sources, metallogenic age, and precipitation mechanism.

Dr. Yongmei Zhang
Dr. Yiwei Peng
Guest Editors

Manuscript Submission Information

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  • fluid inclusion
  • isotope geochemistry
  • gold deposit
  • ore genesis
  • mineralization age
  • tectonic evolution
  • ore and gangue minerals

Published Papers (1 paper)

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Post-Subduction Granite Magmatism and Gold-Sulfide Mineralization in the Abu Zawal (Fatira) Area, Eastern Desert, Egypt
Minerals 2023, 13(4), 489; https://doi.org/10.3390/min13040489 - 30 Mar 2023
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Gold-sulfide mineralization in the Abu Zawal (Fatira) mine area, North Eastern Desert of Egypt, is related to porphyritic felsite dikes and elongate silicification zones in granitic rocks. These felsite dikes and the host granitic rocks exhibit major and trace element geochemical features typical [...] Read more.
Gold-sulfide mineralization in the Abu Zawal (Fatira) mine area, North Eastern Desert of Egypt, is related to porphyritic felsite dikes and elongate silicification zones in granitic rocks. These felsite dikes and the host granitic rocks exhibit major and trace element geochemical features typical of calc-alkaline and metaluminous I-type granites, likely originated in a late-orogenic setting. Their geochemical characteristics along with their fractionated LREE relative to HREE patterns imply either formation in a subduction-related environment or generation from subduction-modified source materials. Partial melting of subduction-metasomatized lower crustal rocks during extension following the lithospheric thickening may account for the production of such fertile, high Sr/Y and La/Yb magmas. In the Abu Zawal (Fatira) area, NE-trending altered felsite dikes, hydrothermal breccias, quartz enclaves, and wall-rock replacements are characterized by disseminations of chalcopyrite, pyrite, and rare gold. Alteration mineralogy, dominated by sericite, drusy quartz, kaolinite, calcite, and specular hematite, combined with the available fluid inclusion data suggests moderate to low temperature and near neutral pH conditions. The geochemical data of the altered wallrocks and mass balance calculations indicate significant mass losses in the altered rocks consistent with fluid/wallrock ratios higher than unity and near neutral pH conditions. Considering that the silica-rich host rocks, hydrothermal alteration, and sulfide-bearing hydrothermal quartz breccia in Fatira mine area were intuitively related to sulfur-saturated, oxidized felsic magmatism and associated hydrothermal systems, they are most likely linked to the post-subduction felsite porphyries (post-Hammamat felsites ~ 607 Ma), or pertaining to the late phases of the subaerial high-K calc-alkaline volcanics (Dokhan Volcanics ≤ 620 Ma). Full article
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