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DOI	10.1007/s11430-014-4940-2
	Geochemical processes and origin of boron isotopes in geothermal water in the Yunnan-Tibet geothermal zone
	Lu YuanYuan; Zheng MianPing; Zhao Ping; Xu RongHua
通讯作者	Lu, YY (通讯作者)
发表日期	2014
ISSN	1674-7313
EISSN	1869-1897
起始页码	2934
结束页码	2944
卷号	57 期号:12
英文摘要	Boron concentrations and isotope compositions have been measured for 93 water samples from the hot springs and drill-holes in the geothermal system in the Yunnan-Tibet Geothermal Belt (YTGB), China. Boron concentrations range from 0.036-472.4 ppm, and the delta B-11 values range from -16.0aEuro degrees to 13.1aEuro degrees, indicating the non-marine origin for each geothermal system. We observed a clear binary mixing relationship between the B concentrations and B isotope compositions in Tibet geothermal area. This relationship can be well explained by two sources, i.e., marine carbonate rocks and magmatic rocks, for the Tibet geothermal water. No evidence supports a mantle contribution to B. In addition, we found that the precipitation only plays a dilution role for B of geothermal waters. delta B-11 values for the precipitation across the southern Tibetan Plateau area range from -6.0aEuro degrees to -6.8aEuro degrees at least. Due to data scarcity in Yunnan geothermal area, we observed possible different boron sources from the Tibet geothermal system. Comparing it with other geothermal systems in the world, we found that the samples from YTGB have the lowest delta B-11 values and the largest range of B concentration, which might be related to their special geological background. On the whole, the world geothermal delta B-11-Cl/B relation suggests a mixing process between marine and non-marine sources. Additionally, we suggest that B source of B-enriched geothermal waters is mainly from B-enriched crustal country-rocks, instead of mantle.
关键词	NATURAL HYDROTHERMAL SYSTEMS HOT-SPRING WATERS THERMAL WATERS SOUTHERN TIBET FRACTIONATION CONSTRAINTS HELIUM SR RESERVOIRS EVOLUTION
英文关键词	Yunnan-Tibet geothermal zone; Boron isotope; geothermal water; tracing
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000346170700008
来源期刊	SCIENCE CHINA-EARTH SCIENCES
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/258291
推荐引用方式 GB/T 7714	Lu YuanYuan,Zheng MianPing,Zhao Ping,et al. Geochemical processes and origin of boron isotopes in geothermal water in the Yunnan-Tibet geothermal zone[J]. 中国科学院青藏高原研究所,2014,57(12).
APA	Lu YuanYuan,Zheng MianPing,Zhao Ping,&Xu RongHua.(2014).Geochemical processes and origin of boron isotopes in geothermal water in the Yunnan-Tibet geothermal zone.SCIENCE CHINA-EARTH SCIENCES,57(12).
MLA	Lu YuanYuan,et al."Geochemical processes and origin of boron isotopes in geothermal water in the Yunnan-Tibet geothermal zone".SCIENCE CHINA-EARTH SCIENCES 57.12(2014).