Geochemistry and Ar–Ar muscovite ages of the Daraban Leucogranite, Mawat Ophiolite, northeastern Iraq: Implications for Arabia–Eurasia continental collision

Mohammad, Yousif O.; Cornell, David H.; Qaradaghi, Jabbar H.; Mohammad, Fahmy O.

doi:10.1016/j.jseaes.2013.09.029

Cited by 24 publications

(25 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These data constrain the temporal relationships of granitoid magmatism to the development of this Mesozoic ophiolite of the ZOB. Our zircon U–Pb data, integrated with muscovite 40 Ar– 39 Ar data for the same intrusion (Mohammad et al, ), document a bimodal age character that we explain in the context of the geodynamic evolution of the Zagros ophiolite belt.…”

Section: Introductionsupporting

confidence: 78%

“…(a) Regional tectonic map of the Kurdistan region of northeast Iraq showing the major tectonic subdivisions and locations of Iraqi Zagros ophiolites (after Mohammad et al, ). (b) Geological map showing central sector of Mawat ophiolite…”

Section: Geological Backgroundmentioning

confidence: 99%

“…More recently, 40 Ar– 39 Ar muscovite step‐heating dating yielded plateau ages of 37.7 ± 0.3 Ma for single grain muscovites from a leucogranite intrusion hosted in the harzburgite section of the Mawat ophiolite, which were interpreted to reflect the timing of the initial continental collision between the northeastern Arabian and Eurasian plates in the Kurdistan region of Iraq (Mohammad et al, ).…”

Section: Published Radiometric Age Data For the Mawat Ophiolitementioning

confidence: 99%

“…Based on the classification of Frost et al (), the leucogranites of the Mawat ophiolite are peraluminous and high‐K calc‐alkaline in composition resemble S‐type granites. Detailed geochemical analysis and interpretation of the Draban leucogranite genesis are provided in Mohammad et al ().…”

Section: Field Relations and Petrography Of Leucogranite In Mawat Ophmentioning

confidence: 99%

“…Minor granitic intrusions of various compositions are commonly observed in ophiolites, which range in composition from plagiogranite to leucogranite (Mohammad, Cornell, Qaradaghi, & Mohammad, ). Geochronological studies of such granitic intrusions in ophiolites provide an important key for deciphering the geodynamic evolution of the ophiolite domains incorporated into the orogenic belts.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

U–Pb zircon geochronology of the Daraban leucogranite, Mawat ophiolite, Northeastern Iraq: A record of the subduction to collision history for the Arabia–Eurasia plates

Mohammad

Cornell

2017

Island Arc

Self Cite

View full text Add to dashboard Cite

The Mawat ophiolite is part of the Mesozoic Neo‐Tethyan ophiolite belt of the Middle East and is located in the Zagros Imbricate Zone of Iraq. It represents fossil fragments of the Neo‐Tethyan oceanic lithosphere within the Alpine collisional system between the Arabian and Eurasia Plates. The first U–Pb zircon dating of the Daraban leucogranite from the Mawat ophiolite provides a 207Pb–206Pb age of 96.8 ± 6.0 Ma. The age is 59.0 ± 6.0 m.y. older than the previously published age of the Daraban leucogranite obtained by 40Ar–39Ar muscovite dating method. The U–Pb dating of magmatic zircons collected from the Daraban leucogranite, which intrudes into the Mawat ophiolite, reveals that melting of the pelagic sediment beneath the hot Zagros proto‐ophiolite in an intra‐oceanic arc environment led to anatexis at the subduction front and the generation of granitic melts at 96.8 ± 6.0 Ma, which were emplaced in the overlaying mantle wedge. This process was a response to the initial formation of the Neo‐Tethys ophiolite above a northeast‐dipping intra‐oceanic subduction zone at 96.8 ± 6.0 Ma. Published 40Ar–39Ar muscovite dating from the same leucogranite dike yields plateau ages of 37.7 ± 0.3 Ma, reflecting that the age was reset during the Arabia–Eurasia continental collision. Therefore, the bimodal age populations from the granitic intrusion in the Mawat ophiolite preserve a record of the subduction to the collision cycle of the Zagros Orogenic Belt. The 59.0 ± 6.0 m.y. age difference from the Daraban leucogranite represents the duration of the subduction‐collision cycle of the Zagros Orogenic Belt in the Kurdistan region of Iraq and the time span for the closure of the Neo‐Tethys Ocean along the northern margin of the Arabian plate.

show abstract

Section: Introductionsupporting

confidence: 78%

Section: Geological Backgroundmentioning

confidence: 99%

Section: Published Radiometric Age Data For the Mawat Ophiolitementioning

confidence: 99%

Section: Field Relations and Petrography Of Leucogranite In Mawat Ophmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations