This study develops a method to estimate the redistribution of elements during several associated metasomatic processes simultaneously involved in the formation of a geological complex The method is based on classical mass balancing using isocon analysis. The proposed approach is applicable if geological prerequisites indicate that (a) the metasomatic rocks inherited some components (, etc.) from one of the earlier rocks of the studied complex; (b) these components have been transported by a fluid; and (c) this saturated fluid has produced several varieties of metasomatic rocks rich in components , etc. In the case of the specified background, the proposed method estimates the mass proportions between the source rock and the varieties of the resulting metasomatic rocks. We present the geological profile of the processes to which the proposed method is applicable, the mathematical model of the method, examples of the application and interpretation of the results, and geological criteria to verify the obtained model results. In brief,•This study introduces a method for calculating the mass proportions between the source rock and metasomatic rocks formed from the material remobilized from the source rock;•The paper considers the applicability limits of the method, exemplifies the interpretation of the results, and shows the methods for monitoring the correctness of these results.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8718661 | PMC |
| http://dx.doi.org/10.1016/j.mex.2021.101609 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A new occurrence of hydrous andradite within pyroclastic rocks of the Sierra De Bahoruco, Dominican Republic.
Sci Rep
December 2024
Faculty of Materials Science and Ceramics, AGH University of Krakow, 30 Mickiewicz Av, Kraków, 30-059, Poland.
The titanium-bearing (up to 3.31 wt% TiO) hydrous andradite [CaNaKFe][Fe AlTiFeMgVMn]SiO(OH) was identified within intensely altered and weathered pyroclastic rocks in the Sierra de Bahoruco region in the Dominican Republic. It forms small isolated euhedral crystals, infillings of fissures and fractures, and large polycrystalline aggregates, in close paragenesis with clinochlore and calcite.
View Article and Find Full Text PDFA Machine-Learning Approach to Biosignature Exploration on Early Earth and Mars Using Sulfur Isotope and Trace Element Data in Pyrite.
Astrobiology
November 2024
Earth and Planetary Sciences, University of California, Riverside, California, USA.
Article Synopsis
- A new method is proposed to identify the origin of pyrite grains and differentiate between biologically influenced and abiotic sedimentary pyrite using sulfur isotope and trace element analyses.
- Multiple machine-learning algorithms were tested, with K-means++ classifying pyrite into six types based on their formation environments, and a random forest model achieving high predictive precision.
- The study enhances the ability to explore altered sedimentary rocks and could help distinguish biogenic from abiotic pyrite in early Earth samples and aid in searching for biosignatures in Martian samples.
A rapid transition from subduction to Barrovian metamorphism: geochronology of mafic-ultramafic relicts of oceanic crust in the Central Alps, Switzerland.
Swiss J Geosci
August 2024
Institute of Geological Sciences, University of Bern, Baltzerstrasse 1+3, 3012 Bern, Switzerland.
Unlabelled: Relicts of subducted oceanic lithosphere provide key information for the tectonic reconstructions of convergent margins. In the Central Alps, such relicts occur as isolated mafic-ultramafic lenses within the migmatites of the southern Adula nappe and Cima-Lunga unit. Analysis of the major-, minor-, and accessory minerals of these ophiolitic relicts, combined with zircon and rutile U-Pb ages and zircon oxygen isotopes, allows the reconstruction of different stages of their complex evolution.
View Article and Find Full Text PDFGeochronology, geochemistry, and geological significance of early Jurassic intrusive rocks in the Lesser Xing'an- Zhangguangcai Range, northeast China.
PLoS One
August 2024
College of Mining, Liaoning Technical University, Fuxin, Liaoning, China.
The Lesser Xing'an-Zhangguangcai Range of northeast China is located in the eastern segment of the Central Asian Orogenic Belt (CAOB), which records intense magmatism during the Mesozoic. The petrogenesis and geodynamic setting of the Early Jurassic intrusive rocks in this region are unclear. In this paper, we present new zircon U-Pb age and whole-rock geochemical data for these intrusive rocks to investigate their origins and tectonic setting.
View Article and Find Full Text PDFMercury isotope evidence for the importance of recycled fluids in collisional ore systems.
Sci Adv
August 2024
ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS) and GEMOC, Department of Earth and Planetary Sciences, Macquarie University, NSW 2109, Australia.
Article Synopsis
- The study investigates the sources of fluids and metals in porphyry systems within continental-collision settings, focusing on mercury isotopes as a potential indicator.
- The research shows positive mercury isotope values in fertile porphyries and associated mafic magmas, suggesting a connection to seawater and marine sediments, while barren rocks show negative values.
- The findings challenge existing models by proposing that the metal and fluid sources in post-subduction porphyry copper deposits are influenced more by mantle processes and oceanic plate subduction than by melting of the lower continental crust.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!