Origin of unusual HREE-Mo-rich carbonatites in the Qinling orogen, China

doi:10.1038/srep37377

CORC > 北京大学 > 地球与空间科学学院

	Origin of unusual HREE-Mo-rich carbonatites in the Qinling orogen, China
	Song, Wenlei ; Xu, Cheng ; Smith, Martin P. ; Kynicky, Jindrich ; Huang, Kangjun ; Wei, Chunwan ; Zhou, Li ; Shu, Qihai
刊名	SCIENTIFIC REPORTS
	2016
关键词	MAGNESIUM ISOTOPIC COMPOSITION CONTINENTAL-CRUST GROUP MINERALS CHEMICAL-COMPOSITION OLDOINYO LENGAI PHASE-RELATIONS EARTH MANTLE MAGMA SYSTEMATICS
DOI	10.1038/srep37377
英文摘要	Carbonatites, usually occurring within intra-continental rift-related settings, have strong light rare earth element (LREE) enrichment; they rarely contain economic heavy REE (HREE). Here, we report the identification of Late Triassic HREE-Mo-rich carbonatites in the northernmost Qinling orogen. The rocks contain abundant primary HREE minerals and molybdenite. Calcite-hosted fluid inclusions, inferred to represent a magmatic-derived aqueous fluid phase, contain significant concentrations of Mo (similar to 17 ppm), reinforcing the inference that these carbonatitic magmas had high Mo concentrations. By contrast, Late Triassic carbonatites in southernmost Qinling have economic LREE concentrations, but are depleted in HREE and Mo. Both of these carbonatite types have low delta Mg-26 values (-1.89 to-1.07%), similar to sedimentary carbonates, suggesting a recycled sediment contribution for REE enrichment in their mantle sources. We propose that the carbonatites in the Qinling orogen were formed, at least in part, by the melting of a subducted carbonate-bearing slab, and that 10 Ma younger carbonatite magmas in the northernmost Qinling metasomatized the thickened eclogitic lower crust to produce high levels of HREE and Mo.; Chinese '973' Project [2013CB429800]; Chinese National Science Foundation [41573033]; European Union's Horizon [689909]; Czechic Project CEITEC [LQ1601]; Key Research Program of Frontier Sciences, CAS [QYZDB-SSW-DQC008]; SCI(E); ARTICLE; xucheng1999@pku.edu.cn; 6
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/458417]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Song, Wenlei,Xu, Cheng,Smith, Martin P.,et al. Origin of unusual HREE-Mo-rich carbonatites in the Qinling orogen, China[J]. SCIENTIFIC REPORTS,2016.
APA	Song, Wenlei.,Xu, Cheng.,Smith, Martin P..,Kynicky, Jindrich.,Huang, Kangjun.,...&Shu, Qihai.(2016).Origin of unusual HREE-Mo-rich carbonatites in the Qinling orogen, China.SCIENTIFIC REPORTS.
MLA	Song, Wenlei,et al."Origin of unusual HREE-Mo-rich carbonatites in the Qinling orogen, China".SCIENTIFIC REPORTS (2016).