Texture and composition of ferrian ilmenite from hornblende andesites of the Timok Magmatic Complex, Serbia

Aleksandar Luković; Predrag Vulić †; Janez Zavašnik; Vladica Cvetković; Kristina Šarić; Miodrag Banješević; Marina Lazarov; Aleksandar Pačevski

doi:10.1127/njma/2021/0240

Porphyry Cu–Au mineralization in the Mirkuh Ali Mirza magmatic complex, NW Iran

Journal of Asian Earth Sciences ◽

10.1016/j.jseaes.2012.10.002 ◽

2014 ◽

Vol 79 ◽

pp. 932-941 ◽

Cited By ~ 26

Author(s):

A. Maghsoudi ◽

M. Yazdi ◽

M. Mehrpartou ◽

M. Vosoughi ◽

S. Younesi

Keyword(s):

Magmatic Complex ◽

Nw Iran ◽

Porphyry Cu

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Numerical simulation of the Late Jurassic closure of the Vardar Tethys

10.5194/egusphere-egu21-9893 ◽

2021 ◽

Author(s):

Nikola Stanković ◽

Vesna Cvetkov ◽

Vladica Cvetković

Keyword(s):

Boundary Conditions ◽

Numerical Simulations ◽

Stokes Equations ◽

Numerical Study ◽

Phase Evolution ◽

Staggered Grid ◽

Second Phase ◽

Weak Zone ◽

Ongoing Research ◽

Magmatic Complex

We report updated results of our ongoing research on constraining geodynamic conditions associated with the final closure of the Vardar branch of the Tethys Ocean by means of application of numerical simulations (previous interim results reported in EGU2020-5919).The aim of our numerical study is to test the hypothesis that a single eastward subduction in the Jurassic is a valid explanation for the occurrence of three major, presently observed geological entities that are left behind after the closure of the Vardar Tethys. These include: ophiolite-like igneous rocks of the Sava-Vardar zone and presumably subduction related Timok Magmatic Complex, both Late Cretaceous in age as well as Jurassic ophiolites obducted onto the Adriatic margin. In our simulations we initiate an intraoceanic subduction in the Early/Middle Jurassic, which eventually transitions into an oceanic closure and subsequent continental collision processes.In the scope of our study numerical simulations are performed by solving a set of partial differential equations: the continuity equation, the Navier-Stokes equations and the temperature equation. To this end we used I2VIS thermo-mechanical code which utilizes marker in cell approach with finite difference discretization of equations on a staggered grid [Gerya et al., 2000; Gerya&Yuen, 2003].The 2D model consists of two continental plates separated by two oceanic slabs connected at a mid-oceanic ridge. Intraoceanic subduction is initiated along the ridge by assigning a weak zone beneath the ridge. Time-dependent boundary conditions for velocity are imposed on the simulation in order to model a transient spreading period. The change of sign in plate velocities is found to be useful for both obtaining obduction / ophiolite emplacement [Duretz et al., 2016] and causing back-arc extension. Changes in velocities are linear in time. Simulations follow a three-phase evolution of velocity boundary conditions consisting of two convergent phases separated by a single divergent phase where spreading regime is dominant. Effect of duration and magnitude of the second phase on model evolution is also explored.Our so far obtained simulations were able to reproduce the westward obduction and certain extension processes along the active (European) margin, which match the existing geological relationships. However, the simulations involve an unreasonably short geodynamic event (cca 15-20 My) and we are working on solving this problem with new simulations.&#160;

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Cambrian–Ordovician magmatism of the Ikh-Mongol Arc System exemplified by the Khantaishir Magmatic Complex (Lake Zone, south–central Mongolia)

Gondwana Research ◽

10.1016/j.gr.2017.10.003 ◽

2018 ◽

Vol 54 ◽

pp. 122-149 ◽

Cited By ~ 22

Author(s):

Vojtěch Janoušek ◽

Yingde Jiang ◽

David Buriánek ◽

Karel Schulmann ◽

Pavel Hanžl ◽

...

Keyword(s):

Magmatic Complex ◽

Central Mongolia ◽

South Central ◽

Lake Zone ◽

Ordovician Magmatism

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Age and geological position of the Okunyovo rare-metal ore magmatic complex (Western Sayan Mountains)

Doklady Earth Sciences ◽

10.1134/s1028334x17120030 ◽

2017 ◽

Vol 477 (2) ◽

pp. 1379-1383 ◽

Cited By ~ 2

Author(s):

D. A. Lykhin ◽

V. V. Yarmolyuk ◽

A. A. Vorontsov ◽

A. V. Travin

Keyword(s):

Rare Metal ◽

Magmatic Complex ◽

Western Sayan ◽

Geological Position

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The Česke Středohoří magmatic complex in Northern Bohemia 40K-40Ar ages for volcanism and biostratigraphy of the Cenozoic freshwater formations

Newsletters on Stratigraphy ◽

10.1127/nos/36/1998/77 ◽

1998 ◽

Vol 36 (2-3) ◽

pp. 77-103 ◽

Cited By ~ 21

Author(s):

Hervé Bellon ◽

Čestmir ✝ Bůžek ◽

Jean Gaudant ◽

Zlatko Kvaček ◽

Harald Walter

Keyword(s):

Magmatic Complex

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SHRIMP Zircon U-Pb Dating of the Tongshi Magmatic Complex in Western Shandong and Its Geological Implications

Acta Geologica Sinica - English Edition ◽

10.1111/j.1755-6724.2005.tb00915.x ◽

2005 ◽

Vol 79 (4) ◽

pp. 491-496

Author(s):

HU Huabin ◽

MAO Jingwen ◽

LIU Dunyi ◽

NIU Shuyin ◽

WANG Yanbin ◽

...

Keyword(s):

Magmatic Complex ◽

Geological Implications ◽

Shrimp Zircon ◽

Western Shandong

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2D Numerical Simulation of Intraoceanic Subduction during the Upper Jurassic Closure of the Vardar Tethys

10.5194/egusphere-egu2020-5919 ◽

2020 ◽

Author(s):

Nikola Stanković ◽

Vesna Cvetkov ◽

Vladica Cvetković

Keyword(s):

Numerical Simulations ◽

Late Cretaceous ◽

Stokes Equations ◽

Numerical Models ◽

Upper Jurassic ◽

Staggered Grid ◽

Parameter Study ◽

Ongoing Research ◽

Magmatic Complex ◽

Vardar Zone

In this study we report interim results of our ongoing research that involves the application of numerical modeling for constraining the geodynamic conditions associated with the closure of the Vardar branch of the Tethys Ocean. The study is aimed at better understanding the ultimate fate of the Balkan ophiolites, namely at addressing the question whether these ophiolites represent relicts of an ocean that completely closed during Upper Jurassic/lowermost Cretaceous time (Vardar Tethys) or they also contain remnants of the ocean floor of a Late Cretaceous oceanic realm (Sava &#8211; Vardar) [Schmid et al., 2008].In our numerical models we try to simulate a single intraoceanic subduction that commences in the Lower/Mid Jurassic and ends in the Lower Cretaceous, transitioning into oceanic closure processes and subsequent collision between Adria and Eurasia plates. These convergent-collision events should have led to the formation of ophiolite-like igneous rocks of the so-called Sava - Vardar zone.A series of numerical simulations were performed with varying parameters. In the scope of our numerical simulations, the set of equations is solved: the continuity equation, the Navier-Stokes equations and the temperature equation. Marker in cell method was incorporated in solving this system with finite difference discretization of the equations on a staggered grid. To utilize this numerical method a thermo-mechanical code I2VIS [Gerya et al., 2000; Gerya & Yuen, 2003] was used for obtaining the final results.&#160;Our actual 2D thermo-mechanical models cover the crust and the upper portion of the mantle with varying starting widths of the Vardar Ocean in the Lower Jurassic. The ocean is modeled with two segments: the western subducting slab and the eastern overriding slab. Slabs with different ages and thicknesses were used and the convergence rate is varied. The intraoceanic subduction is assumed to have been initiated along the mid oceanic ridge. Two continents (i.e. Adria and Eurasia) with different thicknesses of the continental lithosphere and crust are also modeled adjacent to a single oceanic realm between them.The parameter study is in function of defining conditions under which the hypothesized scenario occurs. So far, we have succeeded in reproducing westward obduction onto the Adriatic margin, which is in accordance with the geological observations, i.e., with the top-west emplaced West Vardar ophiolites [see Schmid et al., 2008 for references]. However, our model is yet to produce sufficient amounts of back-arc extension along the Eurasian active margin and that is crucial for explaining the formation of the igneous provinces occurring within the Late Cretaceous Sava &#8211; Vardar zone and the Timok Magmatic Complex.

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