Configuration and Timing of Collision Between Arabia and Eurasia in the Zagros Collision zone, Fars, Southern Iran

dc.contributor.authorCai, Fulong
dc.contributor.authorDing, Lin
dc.contributor.authorWang, Houqi
dc.contributor.authorLaskowski, Andrew K.
dc.contributor.authorZhang, Liyun
dc.contributor.authorZhang, Bo
dc.contributor.authorMohammadi, Ali
dc.contributor.authorLi, Jinxiang
dc.contributor.authorSong, Peiping
dc.contributor.authorLi, Zhenyu
dc.contributor.authorZhang, Qinghai
dc.date.accessioned2022-09-07T15:17:33Z
dc.date.available2022-09-07T15:17:33Z
dc.date.issued2021-08
dc.descriptionFulong Cai et al, 2021, Configuration and Timing of Collision Between Arabia and Eurasia in the Zagros Collision Zone, Fars, Southern Iran, Tectonics, 40, Citation number, 10.1029/2021TC006762. To view the published open abstract, go to https://doi.org/10.1029/2021TC006762en_US
dc.description.abstractThe configuration and timing of the Arabia-Eurasia continental collision, part of the broader Alpine-Himalayan collisional system, remains controversial. We conducted sandstone petrology, detrital zircon U-Pb-Hf isotopic and trace element analysis, and Cr spinel electron microprobe geochemical analysis of samples from Paleocene to Miocene peripheral foreland strata in interior Fars, southern Iran. These data were used to test competing models for ophiolite obduction and Arabia-Eurasia collision. In addition, we applied these data to compare the history of outward and upward growth of the Zagros and Himalayan-Tibetan segments of the Alpine-Himalayan collisional orogenic belt. The first appearance of radiolarian-rich chert conglomerate, 100–90 Ma detrital zircons with positive ɛHf(t) values from +1 to +20 and midocean ridge geochemical affinity, and suprasubduction zone (SSZ) affinity Cr-spinel is in the lower and middle Sachun Formation. These data indicate that obduction occurred before deposition of the upper Maastrichtian-lower Paleocene Sachun Formation and developed in an intra-oceanic setting rather than an Arabia-Eurasia collision setting. Abundant continental-arc affinity detrital zircon with 180–160 Ma and 50–27 Ma age-probability peaks and varied ɛHf(t) values are present in the upper Oligocene-lower Miocene Razak and Agha Jari formations, indicating sedimentary overlap with Eurasia. SSZ-affinity Cr-spinel in all samples indicates that ophiolitic rocks were a continual source of detritus in the foreland basin since Paleocene. The depositional age of the basal Razak Formation is between 25.7 and 21.5 Ma. Therefore, we interpret that collision between Arabia and Eurasia must have been initiated before deposition of the Razak Formation.en_US
dc.identifier.citationCai, F., Ding, L., Wang, H., Laskowski, A. K., Zhang, L., Zhang, B., et al. (2021). Configuration and timing of collision between Arabia and Eurasia in the Zagros collision zone, Fars, southern Iran. Tectonics, 40, e2021TC006762.en_US
dc.identifier.issn0278-7407
dc.identifier.urihttps://scholarworks.montana.edu/handle/1/17083
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.rightscopyright American Geophysical Union 2021en_US
dc.rights.urihttps://perma.cc/K6V9-42JXen_US
dc.subjectcollision arabia eurasiaen_US
dc.titleConfiguration and Timing of Collision Between Arabia and Eurasia in the Zagros Collision zone, Fars, Southern Iranen_US
dc.typeArticleen_US
mus.citation.extentfirstpage1en_US
mus.citation.extentlastpage21en_US
mus.citation.issue8en_US
mus.citation.journaltitleTectonicsen_US
mus.citation.volume40en_US
mus.data.thumbpage6en_US
mus.identifier.doi10.1029/2021TC006762en_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentEarth Sciences.en_US
mus.relation.universityMontana State University - Bozemanen_US

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