Progressive Dissolution of Titanomagnetite in High-Temperature Hydrothermal Vents Dramatically Reduces Magnetization of Basaltic Ocean Crust

doi:10.1029/2020GL087578

GSTDTAP > 气候变化

DOI	10.1029/2020GL087578
	Progressive Dissolution of Titanomagnetite in High-Temperature Hydrothermal Vents Dramatically Reduces Magnetization of Basaltic Ocean Crust
	Wang, Shishun 1; Chang, Liao 1,2; Wu, Tao 3; Tao, Chunhui 3,4
	2020-04-28
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2020
卷号	47 期号:8
文章类型	Article
语种	英语
国家	Peoples R China
英文摘要	Hydrothermal alteration at high-temperature vents near mid-ocean ridge is thought to produce pervasive magnetization lows on basaltic ocean crust, but the detailed alteration process is insufficiently documented. Here, we performed microscopic and magnetic analyses on a large set of hydrothermal-related basaltic samples from the Southwest Indian Ridge. Fresh basalts were chloritized and brecciated during hydrothermal alteration, where titanomagnetite nanoparticle clusters hosted in interstitial glasses were dissolved in the first order, followed by large micron-scale dendritic particles. Natural remanent magnetization was reduced from 10(0)-10(1) A/m for fresh basalts to 10(-3) A/m for fully altered basalts. Hydrothermal deposits acquired a chemical remanent magnetization of 10(-2) A/m. Our results link direct magneto-mineralogical observations to geophysical interpretations, which is important in understanding seafloor hydrothermal circulation and mid-ocean ridge geodynamics.
英文关键词	hydrothermal alteration marine magnetic anomaly mid-ocean ridges rock magnetism
领域	气候变化
收录类别	SCI-E
WOS记录号	WOS:000530332600038
WOS关键词	VARIABLE TI-CONTENT ; GEOTHERMAL SYSTEM ; FLOOR BASALTS ; OXIDATION ; ANOMALIES ; FIELD ; PYRRHOTITE ; MAGNETITE ; BEHAVIOR ; KRAFLA
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/279888
专题	气候变化
作者单位	1.Peking Univ, Sch Earth & Space Sci, Lab Orogen Belts & Crustal Evolut, Beijing, Peoples R China; 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China; 3.Minist Nat Resources, Inst Oceanog 2, Key Lab Submarine Geosci, Hangzhou, Peoples R China; 4.Shanghai Jiao Tong Univ, Sch Oceanog, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Wang, Shishun,Chang, Liao,Wu, Tao,et al. Progressive Dissolution of Titanomagnetite in High-Temperature Hydrothermal Vents Dramatically Reduces Magnetization of Basaltic Ocean Crust[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(8).
APA	Wang, Shishun,Chang, Liao,Wu, Tao,&Tao, Chunhui.(2020).Progressive Dissolution of Titanomagnetite in High-Temperature Hydrothermal Vents Dramatically Reduces Magnetization of Basaltic Ocean Crust.GEOPHYSICAL RESEARCH LETTERS,47(8).
MLA	Wang, Shishun,et al."Progressive Dissolution of Titanomagnetite in High-Temperature Hydrothermal Vents Dramatically Reduces Magnetization of Basaltic Ocean Crust".GEOPHYSICAL RESEARCH LETTERS 47.8(2020).