Detrital zircon provenance analysis in the Zagros Orogen, SW Iran: implications for the amalgamation history of the Neo-Tethys

Zhang, Zhiyong; Xiao, Wenjiao; Majidifard, Mahmoud Reza; Zhu, Rixiang; Wan, Bo; Ao, Songjian; Chen, Ling; Rezaeian, Mahnaz; Esmaeili, Rasoul

doi:10.1007/s00531-016-1314-3

Cited by 55 publications

(43 citation statements)

References 61 publications

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“…(a) Kernel density estimation (KDE) plots with histograms of detrital zircon data from the Neogene Zagros foreland basin deposits in the study area include new data and compiled from Zhang et al (). Sample locations in Figure .…”

Section: Resultsmentioning

confidence: 99%

“…(a) Geologic map of Khorramabad area in Lorestan superimposed on a ASTER‐based (2011) hill shade relief map (asterweb.jpl.nasa.gov/gdem.asp), illustrating the relationship between the Sanandaj‐Sirjan Zone, High Zagros, and simply folded belt; location shown in Figure a. Sample locations for this study are indicated by black dots, detrital zircon sample locations from Zhang et al () are red dots, and magnetostratigraphic growth strata study sites (Emami, ; Homke et al, ) are indicated by rectangles. The black line indicates the trace of the cross section in Figure b.…”

Section: Geologic Backgroundmentioning

confidence: 99%

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Cenozoic Exhumation and Foreland Basin Evolution of the Zagros Orogen During the Arabia‐Eurasia Collision, Western Iran

et al. 2018

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Cenozoic exhumation patterns in the internal and external Zagros reveal a long‐term deformation record associated with geodynamic restructuring of Arabia‐Eurasia collisional zone from continental subduction to plate suturing, which can be evaluated from thermochronometric, provenance, and subsidence analyses. Thermal modeling of zircon and apatite (U‐Th)/He ages and apatite fission track data from the Sanandaj‐Sirjan Zone (SSZ) indicates exhumation and inferred uplift along the leading edge of Eurasia starting in the Late Eocene (~35 Ma), coeval with initial foreland flexural subsidence of Arabia. Together with deceleration in Arabia‐Eurasia convergence and diminished subduction‐related magmatism, these events signal the final Neotethys closure and onset of long‐term (15–20 Myr) Arabian continental subduction beneath Eurasia, facilitated by the attenuated architecture of the precollisional Arabian margin. From 35 to 20 Ma, crustal shortening was relatively subdued and restricted to areas along the Arabia‐Eurasia plate boundary and diffuse inversion structures within continental interiors. Acceleration in SSZ cooling/exhumation rates from 19 to 16 Ma was synchronous with rapid basin subsidence and clastic progradation in the Zagros foreland. These events were contemporaneous with 20‐ to 16‐Ma surge in calc‐alkaline magmatism in central Iran and may have been linked to reorganization/deflection of Arabian plate vectors during the main phase of Red Sea rifting at 19–18 Ma. Transition from continental subduction to Arabia‐Eurasia suturing by ~12 Ma forced a transfer of strain from the subduction zone to intraplate deformational structures. This was marked by rapid outward expansion of the Zagros orogen, involving a shift in exhumation from the SSZ to Zagros fold‐thrust belt and Iranian plate interior.

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Section: Resultsmentioning

confidence: 99%

Section: Geologic Backgroundmentioning

confidence: 99%

Cenozoic Exhumation and Foreland Basin Evolution of the Zagros Orogen During the Arabia‐Eurasia Collision, Western Iran

et al. 2018

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“…Thus, the occurrence of Precambrian zircons in the Permian sandstones can hardly provide evidence of the collision event. Nonetheless, a source exchange is a useful criterion for the collision (DeCelles, Kapp, Gehrels, & Ding, ; Wu et al, ; Zhang et al, ), but the location matters from where the samples were collected. A clear division at the boundary of the precollision blocks is a precondition, when applying detrital zircons to trace the timing of the collisional event.…”

Section: Discussionmentioning

confidence: 99%

Latest Permian–early Triassic arc amalgamation of the Eastern Tianshan (NW China): Constraints from detrital zircons and Hf isotopes of Devonian–Triassic sediments

et al. 2019

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The temporal–spatial framework of arc amalgamation is an important key for understanding the anatomy of orogenic collages, present and past. The Junggar‐Balkhash Ocean was a major branch of the southern Paleo‐Asian Ocean where several arcs were amalgamated. Among them, the Dananhu arc with its characteristic juvenile magmatism and lack of Precambrian basement is an efficient recorder of the evolutional history. From our U–Pb and Lu–Hf isotopic analyses of Devonian to Triassic sediments in the Dananhu arc and Permian sediments in the Yamansu‐Central Tianshan arc, we discovered two major changes in detrital zircon provenance of the Dananhu arc: (a) An increasing input of Precambrian ages from the Mongolia collage at 850, 1,850, and 2,500 Ma, together with Phanerozoic zircons ranging from 420 to 480 Ma with negative εHf(t) value since ca. 288 Ma; (b) the presence of the Yamansu‐Central Tianshan arclike Precambrian age cluster of 1,400–1,600 Ma around 243 Ma. In combination with regional tectonothermal events, these two changes correspond to the formation of the Harlik‐Dananhu composite arc in the latest Carboniferous–early Permian followed by its collision with the Yamansu‐Central Tianshan arc in the latest Permian–early Triassic, which marks the termination of the eastern Junggar‐Balkash Ocean. Analysis of the sedimentary successions within the intraoceanic arcs sheds light on the amalgamation history of the Central Asian Orogenic Belt.

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“…Based on traditional DZ U-Pb data and interpretation for the Amiran and Kashghan Formations in Lorestan (e.g., Zhang et al, 2016), the presence of Triassic and Jurassic DZ U-Pb ages could have been reasonably interpreted as sediment input from Eurasian source terranes, supporting paleogeographic models that depict the collision of Eurasia or the SSZ with Arabia in Late Cretaceous times (e.g., Alavi, 1994;Glennie, 2000). Based on traditional DZ U-Pb data and interpretation for the Amiran and Kashghan Formations in Lorestan (e.g., Zhang et al, 2016), the presence of Triassic and Jurassic DZ U-Pb ages could have been reasonably interpreted as sediment input from Eurasian source terranes, supporting paleogeographic models that depict the collision of Eurasia or the SSZ with Arabia in Late Cretaceous times (e.g., Alavi, 1994;Glennie, 2000).…”

Section: Implications Of Multimineral Isotopic and Trace Elemental Apmentioning

confidence: 99%

The Proto‐Zagros Foreland Basin in Lorestan, Western Iran: Insights From Multimineral Detrital Geothermochronometric and Trace Elemental Provenance Analysis

Barber

Stöckli

Galster

2019

Geochem Geophys Geosyst

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Detrital zircon (DZ) U‐Pb geochronology is a widely used provenance tool that leverages bedrock age signatures of hinterland source terranes. However, complex sediment recycling of multicycle zircon and hinterland provinces with nondiagnostic U‐Pb ages represent possible pitfalls for provenance reconstructions. Additional biases pertain to source rock zircon fertilities and insensitivity to low‐ and medium‐grade tectonothermal events that do not result in zircon generation. To bridge these inherent biases and gaps in DZ U‐Pb provenance data sets and derive more comprehensive tectonic reconstruction, this study combined U‐Pb and trace element analyses on DZ, apatite, and rutile as well as zircon (U‐Th)/He analyses from the Proto‐Zagros foreland basin in western Iran to shed light on Late Cretaceous tectonic accretion along Arabia. Integrated multimineral, multimethod data sets record formation of a 110‐ to 85‐Ma island arc within Triassic mid‐oceanic ridge crust of the Neotethys ocean, simultaneous obduction starting in Santonian‐Early Campanian times, and inversion of the Arabian rift margin. Overall, integration of these techniques constrains provenance based on multiple independent criteria including crystallization age, cooling history, and petrogenic‐geodynamic environment. This approach not only more completely described provenance signatures but also helped avoid significant pitfalls. For example, while Triassic DZ U‐Pb ages might be mistaken as input from Eurasia, zircon trace element analysis reveals a MORB signature and attributes these DZ to Neotethyan oceanic rather than Eurasian continental origin, having fundamentally different paleogeographic/tectonic implications for the Arabia‐Eurasia collision. Moreover, detrital rutile and apatite resolve and characterize multiple Paleozoic‐Mesozoic thermotectonic events not recorded by DZ U‐Pb due to their largely amagmatic nature.

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Detrital zircon provenance analysis in the Zagros Orogen, SW Iran: implications for the amalgamation history of the Neo-Tethys

Cited by 55 publications

References 61 publications

Cenozoic Exhumation and Foreland Basin Evolution of the Zagros Orogen During the Arabia‐Eurasia Collision, Western Iran

Cenozoic Exhumation and Foreland Basin Evolution of the Zagros Orogen During the Arabia‐Eurasia Collision, Western Iran

Latest Permian–early Triassic arc amalgamation of the Eastern Tianshan (NW China): Constraints from detrital zircons and Hf isotopes of Devonian–Triassic sediments

The Proto‐Zagros Foreland Basin in Lorestan, Western Iran: Insights From Multimineral Detrital Geothermochronometric and Trace Elemental Provenance Analysis

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