Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31511.1 |
Late Devonian to early Carboniferous arc-related magmatism in the Baolidao arc, Inner Mongolia, China: Significance for southward accretion of the eastern Central Asian orogenic belt | |
Li, Yilong1; Brouwer, Fraukje M.2; Xiao, Wenjiao3; Zheng, Jianping1 | |
2017-05-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2017 |
卷号 | 129 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Netherlands |
英文摘要 | The Central Asian orogenic belt, formed in response to consumption of the Paleo-Asian Ocean, is one of the largest and most complex accretionary collages in the world and was responsible for considerable Phanerozoic juvenile crustal growth in Central Asia. The timing of subduction-accretion processes and closure of the Paleo-Asian Ocean is controversial. The Xilingol complex, composed of deformed quartzofeldspathic rocks and lenticular or quasi-lamellar amphibolites, is located on the northern section of the eastern Central Asian orogenic belt in Inner Mongolia, China. In this paper, we present a systematic study of the petrology, whole-rock geochemistry, and geochronology of an amphibolite and an epidote amphibolite from the complex. The protolith of the amphibolite is a gabbro or gabbroic diorite with a laserablation- inductively coupled plasma-mass spectrometry (LA-ICP-MS) zircon U-Pb age of 382 +/- 4 Ma and uniform epsilon(Hf(t)) values (-1.06 to + 1.25). The protolith of the epidote amphibolite is a quartz diorite with a LAICP- MS zircon U-Pb age of 327 +/- 5 Ma and uniform positive e Hf(t) values (+ 0.78 to + 4.11). The primitive magma of the Devonian gabbroic dike was generated by partial melting of a spinel lherzolite lithospheric mantle that was modified by fluids and melts from subducted slab components. A newly enriched lithospheric mantle is a possible source region for the Devonian mafic rocks. Fractionation of olivine and hornblende played a dominant role in magma differentiation with little or no crustal contamination. Amphibolite-facies metamorphism affected the Devonian gabbroic rocks at 321.6 +/- 3.1 Ma, and the quartz diorite underwent epidote amphibolite-facies metamorphism at 279.4 +/- 5.3 Ma, based on hornblende Ar-40/Ar-39 dating. The Devonian to Carboniferous intrusive rocks in the eastern Central Asian orogenic belt likely formed during the collapse of a mature arc at the southern margin of the South Mongolian microcontinent. Combining our results with previous data, we identify an initial phase of postcollisional extension (382-340 Ma) that occurred after earlier compression related to intra-oceanic subduction (484-469 Ma), ridge subduction (440-434 Ma), and arccontinent collision (427-383 Ma). We also constrain increasing extension accompanying extensive collapse of the mature arc (340-309 Ma), northward subduction of the forearc oceanic crust (322-274 Ma) coeval with development of the Hegen-shan back-arc basin (354-269 Ma), and final collision (246-228 Ma). The presence of an accretionary belt along the southern margin of the South Mongolian microcontinent reflects the importance of continental growth by accretion of an arc chain during the Late CambrianMiddle Triassic in the eastern Central Asian orogenic belt. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403309300010 |
WOS关键词 | CENTRAL SIERRA-NEVADA ; IZU-BONIN-MARIANA ; SUTURE ZONE CONSTRAINTS ; XILIN GOL COMPLEX ; U-PB ; TRACE-ELEMENT ; SOLONKER SUTURE ; ISLAND-ARC ; CRUSTAL GROWTH ; SE CHINA |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24593 |
专题 | 地球科学 |
作者单位 | 1.China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China; 2.Vrije Univ Amsterdam, Dept Earth Sci, Geol & Geochem Grp, De Boelelaan 1085, NL-1081 HV Amsterdam, Netherlands; 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Yilong,Brouwer, Fraukje M.,Xiao, Wenjiao,et al. Late Devonian to early Carboniferous arc-related magmatism in the Baolidao arc, Inner Mongolia, China: Significance for southward accretion of the eastern Central Asian orogenic belt[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2017,129. |
APA | Li, Yilong,Brouwer, Fraukje M.,Xiao, Wenjiao,&Zheng, Jianping.(2017).Late Devonian to early Carboniferous arc-related magmatism in the Baolidao arc, Inner Mongolia, China: Significance for southward accretion of the eastern Central Asian orogenic belt.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,129. |
MLA | Li, Yilong,et al."Late Devonian to early Carboniferous arc-related magmatism in the Baolidao arc, Inner Mongolia, China: Significance for southward accretion of the eastern Central Asian orogenic belt".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 129(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论