Fluxes to sediments underlying the Rainbow hydrothermal plume at 36°14′N on the Mid-Atlantic Ridge

Cave, R.; German, C. R.; Thomson, J.; Nesbitt, R.W.

doi:10.1016/s0016-7037(02)00823-2

Cited by 111 publications

(130 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the hydrothermal sulphide mineralisation event indisputably overprints the serpentinisation event thus any considerations regarding the vent fluid properties cannot be directly attributed to serpentinisation reactions alone. Consequently, the presence of a magmatic heat source at depth as previously proposed by several authors (Cave et al 2002;Lowell and Rona 2002;Mével et al 2003;Allen and Seyfried 2004) prevails as a reasonable explanation.…”

Section: Nd Isotopessupporting

confidence: 69%

“…However, it is the combination of the serpentinisation process with the presence of a magmatic heat source at depth (e.g. intrusion of a gabbroic body) that may explain the chemical characteristics of the Rainbow site (Cave et al 2002;Lowell and Rona 2002;Mével et al 2003;Allen and Seyfried 2004). The contribution of two sources (seawater and magmatic) in the hydrothermal fluid at Rainbow is also supported by Nd isotopic compositions and Co/Ni and 1/Nd ratios (Fig.…”

Section: Nd Isotopesmentioning

confidence: 83%

“…Recent cruises at the Rainbow hydrothermal vent field (e.g., HEAT cruise 1994;FLORES cruise 1997;IRIS cruise 2001) have enabled a thorough understanding of the tectonic setting, hydrothermal fluid and particle chemistry and the record of hydrothermal activity by sediment coring (German et al 1996;Barriga et al 1997;Donval et al 1997;Douville et al 1997;Parson et al 1997;Gràcia et al 2000;Cave et al 2002;Douville et al 2002;Edmonds and German 2004;Chavagnac et al 2005). However, our knowledge of the sub-surface structure of the Rainbow active hydrothermal system remains very limited.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mineralogy, geochemistry, and Nd isotope composition of the Rainbow hydrothermal field, Mid-Atlantic Ridge

et al. 2006

View full text Add to dashboard Cite

Petrological, geochemical and Nd-isotopic analyses have been carried out on rock samples from the Rainbow vent field to assess the evolution of the hydrothermal system. The Rainbow vent field is an ultramafic-hosted hydrothermal system located on the Mid-Atlantic Ridge, characterized by vigorous high-temperature venting (~365ºC) and unique chemical composition of fluids: high chlorinity, low pH and very high Fe and REE contents (Douville et al. 2002). Serpentinisation has occurred under a low-temperature (<270ºC) retrograde

show abstract

Section: Nd Isotopessupporting

confidence: 69%

Section: Nd Isotopesmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mineralogy, geochemistry, and Nd isotope composition of the Rainbow hydrothermal field, Mid-Atlantic Ridge

et al. 2006

View full text Add to dashboard Cite

show abstract

“…Using previous estimates of heat flux and duration of hydrothermal activity at the 125 RHF (see the GSA Data Repository 1 ), we find that the heat delivered by solidification of 126 the imaged sills could cumulatively support high-temperature hydrothermal circulation 127 for a period of ~1,600-3,000 years, which is ~7-30% of the total hydrothermal system 128 lifespan (Cave et al, 2002;Kuznetsov et al, 2006). These estimates approximately 129 double if additional heat released by crystallization of melt impregnating peridotites that 130…”

Section: Data Repository 1 ) 124mentioning

confidence: 78%

Seismic imaging of magma sills beneath an ultramafic-hosted hydrothermal system

Canales

Dunn

Arai

et al. 2017

Geology

View full text Add to dashboard Cite

10Hydrothermal circulation at mid-ocean ridge volcanic segments extracts heat from 11 crustal magma bodies. However, the heat source driving hydrothermal circulation in 12 ultramafic outcrops, where mantle rocks are exhumed in low-magma supply 13 environments, has remained enigmatic. Here we use a three-dimensional P-wave velocity 14 model derived from active-source wide-angle refraction/reflection ocean bottom 15 seismometer data and pre-stack depth-migrated images derived from multichannel 16 seismic reflection data to investigate the internal structure of the Rainbow ultramafic 17 massif, which is located in a non-transform discontinuity of the Mid-Atlantic Ridge. 18Seismic imaging reveals that the ultramafic rocks composing the Rainbow massif have 19 been intruded by a large number of magmatic sills, distributed throughout the massif at 20 depths of ~2-10 km. These sills, which appear to be at varying stages of crystallization, 21can supply the heat needed to drive high-temperature hydrothermal circulation, and thus 22

show abstract

“…Zn and Cu elements were present in all samples and its concentration in the hydrothermal sediments is much higher than the reference sample MAR6-1. The enrichment of these heavy metal elements is prevalent in the hydrothermal sediments, as the hydrothermal fluid supplies these elements to the underlying sediments that are either sourced hydrothermally directly or scavenged from seawater via the hydrothermal plume (Cave et al, 2002 et al, 2011), the presence of Fe-oxyhydroxides suggest that MAR1 samples might be from an environment of plume fall-out, where hydrothermal components are strongly diluted by pelagic sediments. Ca element is detected in high amounts in the samples TVG13, MAR1-1 and MAR6-1, but it is from a different source between TVG13 and the two MAR samples.…”

Section: The Hydrothermal Environment Indicated By the Inorganic Elemmentioning

confidence: 99%

Characteristics and source of polycyclic aromatic hydrocarbons in the surface hydrothermal sediments from two hydrothermal fields of the Central Indian and Mid-Atlantic Ridges

Peng

Zhou

et al. 2012

Geochem. J.

View full text Add to dashboard Cite

The analysis of major elements and polycyclic aromatic hydrocarbons (PAHs) were carried out on surface hydrothermal sediments collected from the Kairei hydrothermal field on the Central Indian Ridge (CIR) and the Logatchev hydrothermal field on the Mid Atlantic Ridge (MAR). The most characteristic PAHs in the samples were the low molecular weight (LMW) analogs present in a significantly high proportion. Values of the fluoranthene/pyrene (F/P) ratio indicated that PAHs originated from a pyrolytic process. The relative abundance of phenanthrene and its alkyl homologs characterized by the following order C 0 > C 1 > C 2 > C 3 > C 4 , and this result suggested that less biodegradation had occurred in the hydrothermal organic matter. However, a severe secondary oxidation or thermal loss of Benzo[a]pyrene (BaP) would have happened due to the presence of Benzo[e]pyrene (BeP) and absence of BaP in the PAHs. The hierarchical cluster analysis (HCA) showed that these samples could be grouped into four clusters, and all members in the same cluster had a similar inorganic geochemical characteristic. On the basis of canonical correspondence analysis (CCA), the PAH compositions were correlated well with those of inorganic elements. Among them, LMW PAHs such as biphenyl, naphthalene and fluorene were more related to the Talc formation environment, where the Si rich fluids meet the Mg rich seawater. These intermediate weight (IMW) PAHs such as phenanthrene, dibenzothiophene and retene showed a positively relation with metal elements (Fe, Cu and Zn), which may represent a plume fall-out environment. Lastly, the high molecular weights (HMW) PAHs including chrysene, fluoranthene and BeP showed a major positive correlation with environment of the chimney wall. These results suggest that the different molecular weight PAHs might be prone to distribute in different hydrothermal occurrence among the hydrothermal system.

show abstract

Fluxes to sediments underlying the Rainbow hydrothermal plume at 36°14′N on the Mid-Atlantic Ridge

Cited by 111 publications

References 72 publications

Mineralogy, geochemistry, and Nd isotope composition of the Rainbow hydrothermal field, Mid-Atlantic Ridge

Mineralogy, geochemistry, and Nd isotope composition of the Rainbow hydrothermal field, Mid-Atlantic Ridge

Seismic imaging of magma sills beneath an ultramafic-hosted hydrothermal system

Characteristics and source of polycyclic aromatic hydrocarbons in the surface hydrothermal sediments from two hydrothermal fields of the Central Indian and Mid-Atlantic Ridges

Contact Info

Product

Resources

About