Neotocite textures as a clue to the exploration of Red Bed type sediment-hosted stratabound copper (SSC) deposits – evidence from Ravar–Tabas–Eshghabad copper belt, Central Iran DOI
Amir Mahdavi, Abdorrahman Rajabi

International Geology Review, Journal Year: 2023, Volume and Issue: 66(7), P. 1408 - 1422

Published: July 28, 2023

ABSTRACTABSTRACTRed Bed type sediment-hosted stratabound copper (SSC) deposits consist of replaced, disseminated to veinlets sulphides, hosted by thick, haematite-stained sequences sandstone, conglomerate, and siltstone. More than 120 occurrences have been reported in Iran. Ravar–Tabas–Eshghabad is the major Red SSC belt Iran, with a cumulative tonnage more 400 Mt ore at ~1–2% Cu. These are Garedu Formation (including reddish conglomerates micro-conglomerates, red siltstones sandstones), sulphides (chalcocite, minor chalcopyrite bornite) concentrated local reducing conditions that achieved around plant fossil accumulations, within grey paleochannels upper part Formation. usually explored using geochemical, geophysical, remote sensing methods. However, host layers extend laterally up tens kilometres, critical point find horizons where organic matter fossils accumulate, especially underground mining boreholes. The lateral extension ore-bearing lenses 50–150 m, so it not easy them reduced horizons. Recognizing neotocite textures diffusion, radial DLA (diffusion-limited aggregation), cat footprint, spotty), distribution rocks can be used as clue lenses, matter, accumulations.GRAPHICAL ABSTRACTKEYWORDS: Neotocite migrationRavar–Tabas–Eshghabadcopper mineralizationradial aggregation)spotty texture AcknowledgmentsThe clarity paper was substantially improved constructive reviews Dr H. Kouhestani two anonymous reviewers, editorial suggestions Prof. R. Stern.Disclosure statementNo potential conflict interest author(s).Additional informationFundingThe author(s) there no funding associated work featured this article.

Language: Английский

Planktonic and benthic foraminifera from the upper cretaceous succession (north Kerman, Central Iran): a tool for paleobathymetry reconstruction DOI

Alireza Farahnaki,

Massih Afghah,

Ali Faryabi

et al.

Carbonates and Evaporites, Journal Year: 2025, Volume and Issue: 40(1)

Published: Jan. 8, 2025

Language: Английский

Citations

0
Cimmerian metamorphism and post Mid-Cimmerian exhumation in Central Iran: Insights from in-situ Rb/Sr and U/Pb dating DOI Creative Commons
Thomas Gyomlai, Philippe Agard, Laurent Jolivet

et al.

Journal of Asian Earth Sciences, Journal Year: 2022, Volume and Issue: 233, P. 105242 - 105242

Published: May 1, 2022

Language: Английский

Citations

15
Block rotation, kinematic relations, and block configurations: How do they work in nature? DOI
Mohammad R. Ghassemi, Mohammad Reza Sheikholeslami,

Hamid R. Javadi

et al.

Journal of Structural Geology, Journal Year: 2023, Volume and Issue: 176, P. 104979 - 104979

Published: Oct. 18, 2023

Language: Английский

Citations

5
Tectonostratigraphy of the Upper Jurassic-Lower Cretaceous siliciclastic (Shurijeh Formation) in the eastern Kopeh Dagh fold and thrust belt, Iran DOI

Abdullah Aghababaei,

Behnam Rahimi,

Farzin Ghaemi

et al.

Marine and Petroleum Geology, Journal Year: 2024, Volume and Issue: 164, P. 106683 - 106683

Published: March 14, 2024

Language: Английский

Citations

1
Depositional and thermal history of a continental, coal-bearing Middle Jurassic succession from Iran: Hojedk Formation, northern Tabas Block DOI
Mohammad Ali Salehi,

Markus Wilmsen,

Ehsan Zamanian

et al.

Geological Magazine, Journal Year: 2022, Volume and Issue: 160(2), P. 235 - 259

Published: Oct. 6, 2022

Abstract During the early Bajocian, a conspicuous coal-bearing siliciclastic succession was deposited in northern Tabas Bock, which is important for understanding regional geodynamics of Central-East Iranian Microcontinent (CEIM) as well Jurassic coal genesis this part Laurasia. Sedimentary facies analysis well-exposed section lower Bajocian Hojedk Formation (Kalshaneh area, Block) led to recognition ten characteristic sedimentary and three associations, representing channels with point bars floodplains meandering river system. Modal indicates that mature quartz arenites quartzo-lithic sandstones originated from erosion recycling older, supracrustal rocks on Yazd Block west. The petrography maturity show an advanced maturation stage, whereas great thickness these continental strata points pronounced extension-related subsidence Block. rapid rate differential can be explained by accelerated normal block-faulting back-arc extensional basin CEIM, facing Neotethys south. Compared thick Jurassic, post-Jurassic are relatively thin played limited role thermal history A high geothermal gradient tectonically highly mobile area and/or heating regionally widespread Palaeogene intrusions were most probably key drivers Middle coals.

Language: Английский

Citations

7
First estimates for Jurassic seawater temperatures based on oxygen isotope analyses of calcitic fossils from Central Iran: Evidence for a major plate tectonic shift? DOI
Matthias Alberti, Franz T. Fürsich, Nils Andersen

et al.

Journal of Asian Earth Sciences, Journal Year: 2022, Volume and Issue: 236, P. 105338 - 105338

Published: July 14, 2022

Language: Английский

Citations

3
The Proterozoic–Cambrian salt detachment zone at Lakhar Kuh, Iran: a seismic-scale analogue for salt stringers, detachment folding and multiphase structural development DOI
C.K. Morley, Stefan Back

Geological Society London Special Publications, Journal Year: 2024, Volume and Issue: 550(1)

Published: May 2, 2024

Abstract In the Middle East, significant evaporite units formed in latest Precambrian–Cambrian, Triassic, Jurassic, Cretaceous and Cenozoic. The Precambrian–Cambrian period gave rise to Ara Salt carbonate stringer plays, southern Oman giant Zagros anticline traps (Hormuz Formation). While outcrops of salt diapirs are common, basal detachment exposures extremely rare. Lakar Kuh area Central Iran reveals detachment, on satellite images, natural cross-section view through entire Phanerozoic sedimentary section east Ravar. This illustrates how older diapiric structures (pillows normal faults) were focus later contractional folds, particularly Jurassic zone contains many floating blocks (stringers) clastic, igneous rocks. Some stoped from overlying beds, while most layers originally interbedded with evaporites. Block size, distribution orientation is highly variable, folding infrequent. encompasses several key themes generally pertinent structural geology system research: presence stringers within evaporites, multiple levels a thick (>5 km) stratigraphic section, folding, multiphase activity, reactivation by newer ones multi-stage development bodies.

Language: Английский

Citations

0
Stratigraphy, depositional environments and provenance of the Shemshak Group (Upper Triassic–lower Middle Jurassic) on the northern Tabas Block; evidence for the emergent Cimmerian ridge in Central Iran DOI
Mohammad Ali Salehi,

Markus Wilmsen,

Vesal Yahya Sheibani

et al.

Marine and Petroleum Geology, Journal Year: 2024, Volume and Issue: 167, P. 106980 - 106980

Published: June 28, 2024

Language: Английский

Citations

0
Mode and timing of the Early Cretaceous transgression in Iran: Insights from the stratigraphic evidence of sea-level changes and geodynamic events DOI Creative Commons
Fabrizio Berra, Vincenzo Randazzo, Andréa Zanchi

et al.

Journal of Asian Earth Sciences, Journal Year: 2023, Volume and Issue: 254, P. 105736 - 105736

Published: May 27, 2023

The study of selected logs from the Central-Eastern Iran Microplate (CEIM; area Arusan) and Sanandaj–Sirjan Zone (SSZ; areas Esfahan east Tiran) constrains timing evolution Cretaceous successions, resting unconformably on older sediments or non-conformably metamorphic basement. marine transgression occurred almost synchronously a levelled topography, documenting previous deep erosion. Above basal siliciclastic unit, rudist- orbitolinid-rich lower Aptian limestone ("Orbitolina Limestone", Shak Kuh Formation, Taft Formation) were deposited. Later, stratigraphic three studied differentiates, changes in depositional environments, reflecting different subsidence rates. In Tiran area, marls cherty limestones covering shallow-water record deepening trend. A differentiation environment is observed at Arusan, where conglomerates to west pass basinal sandstone east. Here, Coniacian-Campanian reprise carbonate production (with skeletal rich rudists, ostreids, abundant orbitoidids) covered by marls. north glauconitic hardground chert important during early Cenomanian, followed (middle Cenomanian). synchronous deposition successions large parts CEIM, SSZ North-Iranian domains suggests rapid regional controlled sea-level rise. Stratigraphic occurring late Aptian–Cenomanian times, recording onset tectonic events differently affecting aforementioned domains, likely related opening oceanic seaways CEIM SSZ.

Language: Английский

Citations

1
Youngest Cretaceous dinosaur tracksite from the Middle East (Maastrichtian, Farrokhi Formation, Central Iran) DOI Creative Commons

Markus Wilmsen,

Franz T. Fürsich, Mahmoud Reza Majidifard

et al.

Palaeobiodiversity and Palaeoenvironments, Journal Year: 2021, Volume and Issue: 102(2), P. 437 - 447

Published: Dec. 7, 2021

Abstract A late early Maastrichtian dinosaur trampling site is reported from the Farrokhi Formation of Khur area, Central Iran. The largely indeterminate footprints, some which may represent undertracks, can be classified as natural moulds (i.e. concave epireliefs) bordered by a raised rim displaced sediment. They reach diameters up to 0.5 m and were impressed under very shallow subaerial conditions in an inter- supratidal environment. Two generations traces have been imprinted, initially into soft, fine-grained carbonate sand afterwards superficially hardened substrate that was still plastic underneath; change consistency supported conspicuous cracking pattern around footprints. As result, hardly any details foot morphology trackmakers are recorded. Nevertheless, occurrence improves our knowledge about dinoturbation its preservation different kinds substrates. Furthermore, it youngest record (ca. 70 Ma) locomotion Iran and, all probability, entire Middle East.

Language: Английский

Citations

1