Volcanic Activities and Deep Carbon Cycle
详细信息
- 责任者：Guo Zhengfu (Key Laboratory of Cenozoic Geology and Environment ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing100029 ; China) ; Li Xiaohui
- 刊名：Quaternary Sciences
- 出版年：2010
- 卷期：30(3)
- 关键词：火山活动 ; volcanicity ; 碳循环 ; carbon cycle ; 青藏高原 ; Qinghai-Tibetan Plateau
- 页码：p.497-505
- 图表：4 tables, 48 refs.
- 分类号：1400
- issnNo：ISSN1001-7410
- isbnNo：CN11-2708/P
摘要
Research content for a relationship between volcanic activities and deep carbon cycle mainly contains:1) estimations of total mass and flux of volcanic degassing volatiles into the atmosphere; 2) determinations of source field of volcanic volatiles;3)evolutions of volatiles released from volcanic eruptions from asthenospheric mantle to atmosphere; and 4) contributions of three main types of large volcanic activities to deep carbon cycle. Main research method based on analysis in composition of melt inclusion trapped in phenocryst minerals in volcanic eruptive products is as follows: 1)sample collections of volcanic rocks in field work are responsible for determinations of volcanic volatile compositions; 2) compositions and concentrations of volatiles(including Cl，S，F)in melt inclusions entrapped in phenocryst mineral crystals of volcanic rocks are analyzed using the wavelength dispersive electron microprobe; and 3)total weight of volcanic volatiles emitted into the atmosphere are calculated using the ”petrologic method“ based on analysis of compositions and concentrations of volatiles in melt inclusions and matrix glasses in volcanic rocks; and 4)source fields of volatiles from volcanic activities are traced by C-O-N-He isotope compositions and their evolution characteristics are analyzed by oxygen fugacity.
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