Flux and genesis of greenhouse gases emissions from Cenozoic volcanic-geothermal fields, South Tibet: A case study of volcanic-geothermal fields in Gulu-Yadong rift

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院新生代地质与环境重点实验室

	Flux and genesis of greenhouse gases emissions from Cenozoic volcanic-geothermal fields, South Tibet: A case study of volcanic-geothermal fields in Gulu-Yadong rift
	Zhang LiHong 1; Guo ZhengFu 1; Zheng GuoDong 2; Zhang MaoLiang 1; Sun YuTao 1; Cheng ZhiHui 1; Ma XiangXian 2
刊名	ACTA PETROLOGICA SINICA
	2017
卷号	33 期号:1 页码:250-266
关键词	Soil Co2 Flux Volcanic-geothermal Field Continental Subduction Zone Gulu-yadong Rift Tibetan Plateau
ISSN号	1000-0569
文献子类	Article
英文摘要	Gulu-Yadong rift (GYR) is the largest and longest extensional rift in Lhasa terrane, South Tibet. There are a lot of volcanic-geothermal fields in the rift, making it one of the strongest degassing areas in the India-Asia continental subduction zone. Following accumulation chamber method, we estimated the soil CO2 fluxes of Gulu and Yangying volcanic-geothermal fields. The results show that the average soil CO2 flux of Gulu geothermal field is 436. 8g . m(-2) . day(-1)which is similar with Yellowstone in America (410g . m(-2) . day(-1)), while the average soil CO, flux of Yangying is 99g m(-2) . day which is close to Mammoth Mountain volcano (107. 9g . m(-2) . day(-1)) in California, USA. According to the soil CO2 flux of the volcanic-geothermal fields in the GYR, we also estimate the total CO, emission of the Gulu-Yadong rift to be 1. 76 x 10(7)t . a(-1) these high soil CO2 emission suggests significant geological carbon degassing in India-Asia continental subduction zone at present. Based on the geochemical characteristics of the volcanic-geothermal gases from the GYR, both He-3/He-4 ratios (0. 10 similar to 0. 29R(A), R-A is the He-3/He-4 ratio of air) and delta C-13(CO2) values (7. 20 parts per thousand to 0.78 parts per thousand) of soil and bubbling gases display gradually increasing trends from south to north, implying significant difference in geodynamics processes along the GYR. In details, the increasing delta C-13(CO2) values from south to north might be related with variations of crustal lithology from south to north along the GYR. Additionally, most of the He-3/He-4 is higher than 0. 1R(A), implying significant mantle volatile contribution, and the progressively increasing He-3/He-4 from south to north might be related with the northward subduction of the Indian continental lithosphere.
WOS关键词	INDIA INTRACONTINENTAL SUBDUCTION ; HELIUM ISOTOPE EVIDENCE ; EAST-WEST EXTENSION ; DEEP CARBON-CYCLE ; SOIL CO2 FLUX ; LHASA BLOCK ; ULTRAPOTASSIC ROCKS ; SUBCONTINENTAL MANTLE ; GEOCHEMICAL EVOLUTION ; YUNNAN PROVINCE
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000393257900020
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53110]
专题	地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者	Guo ZhengFu
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Lanzhou Ctr Oil & Gas Resources, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhang LiHong,Guo ZhengFu,Zheng GuoDong,et al. Flux and genesis of greenhouse gases emissions from Cenozoic volcanic-geothermal fields, South Tibet: A case study of volcanic-geothermal fields in Gulu-Yadong rift[J]. ACTA PETROLOGICA SINICA,2017,33(1):250-266.
APA	Zhang LiHong.,Guo ZhengFu.,Zheng GuoDong.,Zhang MaoLiang.,Sun YuTao.,...&Ma XiangXian.(2017).Flux and genesis of greenhouse gases emissions from Cenozoic volcanic-geothermal fields, South Tibet: A case study of volcanic-geothermal fields in Gulu-Yadong rift.ACTA PETROLOGICA SINICA,33(1),250-266.
MLA	Zhang LiHong,et al."Flux and genesis of greenhouse gases emissions from Cenozoic volcanic-geothermal fields, South Tibet: A case study of volcanic-geothermal fields in Gulu-Yadong rift".ACTA PETROLOGICA SINICA 33.1(2017):250-266.