干旱区生态环境知识资源中心(Arid): 河西走廊盆地地下水的氦同位素指示

Arid

	河西走廊盆地地下水的氦同位素指示
其他题名	Tracing Groundwater with Helium Isotopic Compositions in the Hexi Corridor Basin, Northwestern China
	赵霞 1; 陈建生 1; 饶文波 2; 盛雪芬 3; 苏治国 3; 陈亮 1
ISSN	0001-5717
出版年	2007
卷号	81 期号:4 页码:563-569
中文摘要	详细讨论了河西走廊的张掖、永昌和武威盆地地下水中同位素~3He/~4He、~4He/~(20)Ne和delta~(13)C的组成与分布特征。结果表明,泉水溢出地表后尽管受大气不同程度的混染,其中仍含有明显的深源氦气的组分,包括放射性元素铀和钍的蜕变及锂诱发的核反应生成的壳源~4He与地球形成初期储存于地幔中的原始~3He。这些氦气挥发份随NNE和WNW向活动断裂带向上迁移,直至被循环的地下水带至地表。
英文摘要	The HexiCorridor （37°17＇N to 42°48＇N; 93°23＇E to 104°12＇E） is situated on the arid region of northwestern China. Fault zones in the Hexi Corridor Basin are still active in response to the collision between the Indian Plate and Eurasian Plate together with the northern extrusion since the Cenozoic. We measured helium and carbon isotopic compositions of groundwater to clarify the origins of helium and volatiles in the groundwater and to disclose a relationship between the groundwater system and fault zones within the Hexi Corridor. The R/Ra values indicate that ~3He from the groundwater in the northern boundary fault of the Qilian Mountains is derived from the mantle with a mixture of atmospheric helium. Frequent earthquake activities activated the North Qilian Fault, so that oceanic basalt vitreous or volcanic rocks were molten to magma again. The magma then trapped mantle-source ~3He and carried it along as it rose into the crust along the faults. In contrast, helium in the Xigaze-Langshan Fault Zone is derived mainly from the crust with mixing of atmospheric helium. Caledonian granites widely distribute in the water-bearing layers, resulting in the sharp increase of ~4He contents produced from the decay of radioactive U and Th elements contained in these types of rocks. Furthermore, the slight mantle-source helium injection in the groundwater is probably due to extraction processes of earthquake. Additionally, The delta~(13)C values show that carbon dioxide is predominately derived from the deep earth. Therefore, helium, neon and carbon dioxide volatiles in the deep earth are released along active fault zones and in turn incorporated in the groundwater, which transported into the ground surface accompanied with the water circulation.
中文关键词	河西走廊 ; He同位素 ; 地下水 ; 断裂带
英文关键词	Hexi Corridor helium isotopes groundwater fault zone
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:2867423
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220814
作者单位	1.河海大学岩土工程研究所, 南京, 江苏 210098, 中国; 2.河海大学科学研究院, 南京, 江苏 210098, 中国; 3.河海大学, 水文水资源与水利工程科学国家重点实验室, 南京, 江苏 210098, 中国
推荐引用方式 GB/T 7714	赵霞,陈建生,饶文波,等. 河西走廊盆地地下水的氦同位素指示[J],2007,81(4):563-569.
APA	赵霞,陈建生,饶文波,盛雪芬,苏治国,&陈亮.(2007).河西走廊盆地地下水的氦同位素指示.,81(4),563-569.
MLA	赵霞,et al."河西走廊盆地地下水的氦同位素指示".81.4(2007):563-569.