Carbon-bearing fluids forming in the process of metamorphism of subduction zones

doi:10.18654/1000-0569/2019.01.06

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 > 岩石圈演化国家重点实验室

	Carbon-bearing fluids forming in the process of metamorphism of subduction zones
	Liu JingBo 1,2
刊名	ACTA PETROLOGICA SINICA
	2019
卷号	35 期号:1 页码:89-98
关键词	Subduction zone Cycle of carbon Carbon-bearing fluid Multiphase solid inclusion Melt inclusion
ISSN号	1000-0569
DOI	10.18654/1000-0569/2019.01.06
英文摘要	Carbon-bearing rocks in subduction zones produce carbon-bearing aqueous fluids, silicate-rich supercritical fluids and carbon-bearing melts by metamorphic reactions during the subduction process. The formation of different fluid types relies on the compositions of rocks and the P-T conditions that the rocks suffered. The P-T conditions of carbonate devolatilization reactions depend on the initial compositions of fluids, and in the presence of H2O, the reactions occur at decreasing temperature conditions. At the high-pressure conditions, the dissolution of carbonate minerals in fluid is substantial mechanism for formation of carbon-bearing fluid, which parobably plays more important role than that of carbonate devolatilization reactions for carbon removal of rocks. In high-temperature circumstances such as hot subduction zones and in the case of diapirs of the rocks of subduction zones into mantle wedge, partial melting of carbon-bearing rocks can produce carbon-bearing melts that are responsible for carbon migration. Silicate-rich supercritical fluids probably form above the second critical endpoint, and multiphase solid inclusions observed in some minerals of UHP rocks were considered to be crystallized from such fluids. However, there are many open questions, and more experiments need for such interpretation. Carbon-bearing rocks in subduction zones were brought into deep mantle by subduction, and produce different types of carbon-bearing fluids in terms of different geotherms of subduction zones. The migration of carbon-bearing fluids into mantle wedge results in formation of carbon-bearing arc magmas, and subducted carbon is finally released to the surface in the eruptive process of the magmas, which makes the cycle of carbon in subduction zone-island arc system.
WOS关键词	MULTIPHASE SOLID INCLUSIONS ; ULTRAHIGH-PRESSURE ECLOGITE ; DABIE-SULU TERRANES ; MELT INCLUSIONS ; MANTLE PRESSURES ; UHP METAMORPHISM ; PHASE-RELATIONS ; AQUEOUS FLUIDS ; GARNET ; ERZGEBIRGE
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000456937400006
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/90524]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Liu JingBo
作者单位	1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Liu JingBo. Carbon-bearing fluids forming in the process of metamorphism of subduction zones[J]. ACTA PETROLOGICA SINICA,2019,35(1):89-98.
APA	Liu JingBo.(2019).Carbon-bearing fluids forming in the process of metamorphism of subduction zones.ACTA PETROLOGICA SINICA,35(1),89-98.
MLA	Liu JingBo."Carbon-bearing fluids forming in the process of metamorphism of subduction zones".ACTA PETROLOGICA SINICA 35.1(2019):89-98.