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DOI	10.3390/geosciences13090265
	Geochemical Characteristics of the Volcanic Rocks Associated with Boron-Rich Deposits from the Xiongba Basin, Qinghai-Tibet Plateau
	Chen, Wenxi; Liu, Xifang; Zhao, Yuanyi; Lin, Yongjie
发表日期	2023
EISSN	2076-3263
卷号	13 期号:9
英文摘要	The Qinghai-Tibet Plateau (QTP) hosts significant lacustrine sedimentary boron-rich deposits, with the Xiongba Basin being a prominent region housing two large sedimentary boron-rich deposits. These deposits are closely associated with extensive Neogene volcanic rocks. This study investigates the origin and boron sources of Miocene volcanic rocks in the Xiangqu River area, located within the Xiongba Basin. The volcanic rocks in the basin comprise ultrapotassic andesites, ultrapotassic trachyte, potassic trachyte, and potassic trachyandeiste. The trace element content and the active/inert elements ratios of the studied volcanic rocks have indicated that they were generated in a subduction environment and were influenced by enrichment fluids derived from deep-sea sediments or altered oceanic crust during their formation. Accordingly, the studied volcanic rocks exhibit significant boron enrichment. The eruption of magma and subsequent hydrothermal activity released boron, which became the primary source for the lacustrine sedimentary boron-rich deposits within the basin. The arc-like trace element features (e.g., Nb-Ta depletion relative to La and K) and high B concentrations in these rocks were inherited from the mantle source, which had been enriched by melt/fluid of the subducted sediments. A two-stage evolutionary model is proposed to explain the enrichment of B in subduction environments, as well as the subsequent melting of the B-enriched source during a post-collisional setting. These findings highlight the potential for boron and lithium mineralization in similar volcanic rock-bearing regions across the QTP. Future exploration efforts in such areas could provide valuable insights into the formation processes of lacustrine sedimentary boron-rich deposits and contribute to the understanding of boron and lithium resource potential.
关键词	Xiongba Basin Neogene volcanic rocks geochemical characteristics boron source
英文关键词	CHEMICAL CLASSIFICATION; ULTRAPOTASSIC ROCKS; CONTINENTAL-CRUST; LHASA TERRANE; MANTLE SOURCE; SOUTH TIBET; CONSTRAINTS; SUBDUCTION; MIOCENE; SEDIMENTARY
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:001071943600001
来源期刊	GEOSCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283133
作者单位	China Geological Survey; Chinese Academy of Geological Sciences
推荐引用方式 GB/T 7714	Chen, Wenxi,Liu, Xifang,Zhao, Yuanyi,et al. Geochemical Characteristics of the Volcanic Rocks Associated with Boron-Rich Deposits from the Xiongba Basin, Qinghai-Tibet Plateau[J],2023,13(9).
APA	Chen, Wenxi,Liu, Xifang,Zhao, Yuanyi,&Lin, Yongjie.(2023).Geochemical Characteristics of the Volcanic Rocks Associated with Boron-Rich Deposits from the Xiongba Basin, Qinghai-Tibet Plateau.GEOSCIENCES,13(9).
MLA	Chen, Wenxi,et al."Geochemical Characteristics of the Volcanic Rocks Associated with Boron-Rich Deposits from the Xiongba Basin, Qinghai-Tibet Plateau".GEOSCIENCES 13.9(2023).