Punctuated, episodic magmatism and mineralization of the Rogozna skarn-hosted Au-Zn-Pb-Cu deposits revealed through high-precision U-Pb zircon geochronology


Рад у часопису
Верзија рада
објављена верзија
Sean P. Gaynor, Milorad D. Antić, Vladica Cvetković, Kristina Šarić, Urs Schaltegger
Ore Geology Reviews
Датум издавања
The subvolcanic regions of magmatic centers are commonly associated with alteration, mineralization, and
economic ore deposits, however the duration and frequency of mineralizing pulses within the overall lifespan of
these centers can be poorly defined. Therefore, models for the formation of mineral systems require more highprecision
geochronology data to refine their evolutionary models. Rogozna Mountain and its eponymous
magmatic complex, located in SW Serbia, hosts multiple base metal deposits associated with variable rock types
and structural expressions and serves as a natural laboratory to test the span and periodicity of mineralizing
events. Unlike many deposits within the Rogozna magmatic complex (RMC) and elsewhere within the broader
Serbo-Macedonian magmatic and metallogenic belt represented by Pb-dominated base metal sulfides, the
Rogozna mining project (composed of the Gradina, Medenovac, Copper Canyon and ˇSanac deposits) also hosts
Au-Cu mineralization. Based on previous isotope geochemistry, a single magmatic source was responsible for the
sulfide crystallization associated with Au-Cu mineralization at the Copper Canyon deposit. Therefore, a detailed
determination of igneous events and their temporal relationship remains crucial for understanding the formation
of the Rogozna mineralized system and its multiple deposits.
High-precision chemical abrasion-isotope dilution-thermal ionization mass spectrometry (CA-ID-TIMS) U-Pb
zircon geochronology of six representative samples revealed the first phase of oxidized Au-Zn mineralization at
the Medenovac deposit occurred prior to 28.833 ± 0.154 Ma, based on the inclusion of mineralized skarn clasts
in breccia supported by an igneous-matrix. This age indicates that mineralization and skarn formation began over
1 Myr prior to reduced Au-Cu mineralization at the Copper Canyon deposit, which occurred over a period from
approximately 27.76–27.61 Ma associated with a series of texturally diverse but compositionally similar quartz
latite intrusions. Trachyandesitic dykes emplaced at 25.384 ± 0.068 Ma represent the youngest igneous event in
the RMC. Previous models of the formation of the Rogozna mineralized system are likely flawed by inaccurate
unit classification and incomplete sampling of intrusions associated with the deposits, resulting in an unrealistically
simplistic evolutionary model for mineralization, rather than a protracted history of episodic alteration
and mineralization. Therefore, a reinterpreted temporal hierarchy of the RMC is proposed based on new
compositional and geochronological data, defining multiple mineralization events. This work highlights the
necessity of combining a robust suite of textural analyses, field relationships, and high-precision geochronology
to make accurate interpretations of deposit formation.
број страница
Просторно покривање
Rogozna, Srbija
Skarnovska mineralizacija, Magmatsko-hidrothermalni sistemi, Subvulcanske intruzije, geohronologija na cirkonima, CA-ID-TIMS
Skarn mineralization, Magmatic-hydrothermal systems, Subvolcanic intrusions, Zircon geochronology, CA-ID-TIMS
Шира категорија рада
Ужа категорија рада
Је дио
Уговор о реализацији и финансирању научноистраживачког рада НИО у 2022. години, бр. 451-03-68/2022-14/ 200126.
Отворени приступ
All rights reserved

Sean P. Gaynor, Milorad D. Antić, Vladica Cvetković, Kristina Šarić, Urs Schaltegger. "Punctuated, episodic magmatism and mineralization of the Rogozna skarn-hosted Au-Zn-Pb-Cu deposits revealed through high-precision U-Pb zircon geochronology" in Ore Geology Reviews, Elsevier (2023). https://doi.org/https://doi.org/10.1016/j.oregeorev.2023.105775

This item was submitted on 20. новембар 2023. by [anonymous user] using the form “Рад у часопису” on the site “Радови”: http://gabp-dl.rgf.rs/s/repo

Click here to view the collected data.