气候变化领域集成服务门户(CCPortal): Configuration and Timing of Collision Between Arabia and Eurasia in the Zagros Collision Zone, Fars, Southern Iran

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DOI	10.1029/2021TC006762
	Configuration and Timing of Collision Between Arabia and Eurasia in the Zagros Collision Zone, Fars, Southern Iran
	Cai, Fulong; Ding, Lin; Wang, Houqi; Laskowski, Andrew K.; Zhang, Liyun; Zhang, Bo; Mohammadi, Ali; Li, Jinxiang; Song, Peiping; Li, Zhenyu; Zhang, Qinghai
通讯作者	Cai, FL (通讯作者)
发表日期	2021
ISSN	0278-7407
EISSN	1944-9194
卷号	40 期号:8
英文摘要	The 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 eHf(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 eHf(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.
关键词	ZIRCON U-PB SANANDAJ-SIRJAN ZONE FORELAND-BASIN EVOLUTION FOLD-THRUST BELT TECTONIC EVOLUTION NEYRIZ OPHIOLITE KERMANSHAH OPHIOLITE MASS-SPECTROMETRY PASSIVE MARGIN SUTURE ZONE
英文关键词	Arabia-Eurasia collision; detrital zircon U-Pb-Hf; foreland basin; ophiolitic obduction; orogen expansion
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000691011200016
来源期刊	TECTONICS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260371
推荐引用方式 GB/T 7714	Cai, Fulong,Ding, Lin,Wang, Houqi,et al. Configuration and Timing of Collision Between Arabia and Eurasia in the Zagros Collision Zone, Fars, Southern Iran[J]. 中国科学院青藏高原研究所,2021,40(8).
APA	Cai, Fulong.,Ding, Lin.,Wang, Houqi.,Laskowski, Andrew K..,Zhang, Liyun.,...&Zhang, Qinghai.(2021).Configuration and Timing of Collision Between Arabia and Eurasia in the Zagros Collision Zone, Fars, Southern Iran.TECTONICS,40(8).
MLA	Cai, Fulong,et al."Configuration and Timing of Collision Between Arabia and Eurasia in the Zagros Collision Zone, Fars, Southern Iran".TECTONICS 40.8(2021).