Petrological, Geochemical and Geodynamic Study of Ophiolites and Modern Oceanic Lithosphere

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

Deadline for manuscript submissions: 31 March 2025 | Viewed by 1221

Special Issue Editors


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Guest Editor
Department of Earth Sciences "Ardito Desio", University of Milan, Via Mangiagalli, 34, 20133 Milano, MI, Italy
Interests: ophiolites; oceanic lithosphere; structural geology; high pressure metamorphism; subduction processes
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School of Earth Science and Resources, Chang'an University, Xi'an 710054, China
Interests: ophiolite; granites; geochemistry; tectonics
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Special Issue Information

Dear Colleagues,

The architectural and geochemical signatures of ophiolites are derived from variation in petrological, geochemical and tectonic processes acting in different geodynamic settings. Significant advances in marine geosciences have recently improved the comparison between ophiolites and the modern oceanic lithosphere, created at various spreading rates in the context of the entire mid-ocean ridge-transform system. One of the striking features that ophiolites and the modern oceanic lithosphere have in common is the formation of secondary minerals and mineralization, caused by the interaction between rock and seawater or hydrothermal fluids that penetrate the crust via permeable structures created by fissuring and faulting, and via the intrinsic porosity of the rock. We encourage authors to submit papers to this Special Issue that focus on the mineralogical and geochemical composition of ophiolites and the modern oceanic lithosphere. Studies may use both or either traditional or novel analytical techniques. They should also provide new insights into rock–seawater and/or rock–hydrothermal fluid interactions, mineral deposits in ophiolites and the modern oceanic lithosphere, and/or biomineralization, in relation to the different oceanic geodynamic settings.

Dr. Paola Tartarotti
Dr. Ruibao Li
Guest Editors

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Keywords

  • hydrothermal minerals
  • oceanic alteration
  • oceanic mineral deposits
  • biomineralization
  • mid-ocean ridge processes

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Published Papers (1 paper)

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Research

34 pages, 11964 KiB  
Article
Formation and Tectonic Evolution of Ophiolites in the Sabah Area (Borneo, SE Asia)
by Zhiwen Tian, Youfeng Gao, Pujun Wang and Huafeng Tang
Minerals 2024, 14(11), 1078; https://doi.org/10.3390/min14111078 - 25 Oct 2024
Viewed by 911
Abstract
Zircon U-Pb dating, rock geochemistry, Sr-Nd-Pb, and zircon Hf isotope analyses were conducted on the ultrabasic and basic rocks of ophiolites in the Sabah area (Borneo, SE Asia). The zircon U-Pb ages of ultrabasic and basic rocks range from 248 to 244 Ma, [...] Read more.
Zircon U-Pb dating, rock geochemistry, Sr-Nd-Pb, and zircon Hf isotope analyses were conducted on the ultrabasic and basic rocks of ophiolites in the Sabah area (Borneo, SE Asia). The zircon U-Pb ages of ultrabasic and basic rocks range from 248 to 244 Ma, indicating that the ophiolites already existed in the early Triassic. The rare earth elements of basic rocks in Central Sabah show N-MORB-type characteristics and E-MORB-type characteristics in the northwest and southeast. The εNd(t) values of basic rocks range from 3.66 to 8.73, and the εHf(t) values of zircon in ultrabasic rocks are between −10.2 and −6.1. Trace element analysis shows that the magmatic source was influenced by melts and fluids from the subducting plate of the Paleo-Tethys Ocean. The tectonic evolution of the Sabah area can be traced back to the Early Triassic. At that time, the fast subduction of the Paleo-Tethys Ocean plate and the retreating of the Paleo-Pacific plate resulted in the upwelling of mantle material in relatively small extensional settings, leading to the formation of the ophiolites. From the Jurassic to the Early Cretaceous, the Paleo-Pacific plate was intensely subducted, and the ophiolite intrusion in the Sabah area moved to the continental crust of South China or the Sundaland margin as fore-arc ophiolites. From the Late Cretaceous to the Miocene, with the expansion of the Proto-South China Sea and South China Sea oceanic crust, the ophiolites in the Sabah area drifted southward with microplate fragments and sutured with East Borneo. Full article
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