Hydrothermal Activity Related to Arc-Backarc Magmatism in the Western Pacific

Ishibashi, Jun-ichiro; Urabe, Tetsuro

doi:10.1007/978-1-4615-1843-3_13

Cited by 139 publications

(112 citation statements)

References 120 publications

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“…This is consistent with the lower confining pressures from shallower water depths of the middle Okinawa Trough (<1000 m; Chiba, 1997) when compared to the PACMANUS (~1650 m) and DESMOS (~2000 m) systems of the Manus Basin, and similar hydrothermal fields of the Lau Basin (e.g. Valu Fa Ridge, ~1700 m) (Ishibashi and Urabe, 1995).…”

Section: Fluid/rock Interaction and Active Vhms Mineralization At Ihesupporting

confidence: 69%

“…Therefore, analogues for specific types of VHMS deposits are represented by different modern hydrothermal systems (e.g. Glasby et al, 2008;Hannington et al, 1998;Ishibashi and Urabe, 1995;Lüders et al, 2001;Webber et al, 2015). Active systems provide important insights into the formation of ancient VHMS deposits, allowing fluids to be directly sampled and mineralization to be studied without the effects of subsequent deformation and metamorphism.…”

Section: Introductionmentioning

confidence: 99%

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Actively forming Kuroko-type volcanic-hosted massive sulfide (VHMS) mineralization at Iheya North, Okinawa Trough, Japan

Yeats

Hollis

Halfpenny

et al. 2017

Ore Geology Reviews

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Section: Fluid/rock Interaction and Active Vhms Mineralization At Ihesupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Actively forming Kuroko-type volcanic-hosted massive sulfide (VHMS) mineralization at Iheya North, Okinawa Trough, Japan

Yeats

Hollis

Halfpenny

et al. 2017

Ore Geology Reviews

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“…29). Vigorous hydrothermal activities associated with volcanism have been observed in the trough, and the chemistry of emitting fluids has been characterized by high volatiles (i.e., CO 2 and methane) and ammonium concentrations, suggesting the significant interaction of magma with sedimentary organic matter (e.g., Ishibashi and Urabe 1995;Kawagucci, Chap. 35).…”

Section: Okinawa Troughmentioning

confidence: 99%

A Compilation of the Stable Isotopic Compositions of Carbon, Nitrogen, and Sulfur in Soft Body Parts of Animals Collected from Deep-Sea Hydrothermal Vent and Methane Seep Fields: Variations in Energy Source and Importance of Subsurface Microbial Processes in the Sediment-Hosted Systems

Yamanaka

Shimamura

Nagashio

et al. 2014

Subseafloor Biosphere Linked to Hydrothermal Systems

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The stable isotopic signatures of biophilic elements, such as carbon, nitrogen, and sulfur, exhibited in animal soft body parts are excellent indicators for evaluating the pathways of energy and food sources. Thioautotrophic and methanotrophic nutrition prevailed in deep-sea hydrothermal vent and methane seep areas results in sulfide-sulfur and methanecarbon isotopic ratios. In this study, we reevaluated the carbon, nitrogen, and sulfur isotope compositions of animals taken from deep-sea hydrothermal vents and methane seep areas in order to understand the detailed pathways of energy and food sources for the habitants. The results showed that most animals collected from sediment-starved hydrothermal areas rely on thioautotrophic nutrition, using hydrogen sulfide dissolved in venting fluids as the sole primary energy source. On the other hand, animals from sediment-covered hydrothermal vent and cold seep fields show some variations in energy sources, of both hydrothermal and microbial origins. Sediment-covered areas tend to be enriched in biomass and diversity relative to sediment-starved areas. The results suggest that fluid discharged through sediments to the seafloor are strongly affected by subsurface microbial processes and result in increased biomass and diversity of the seafloor animal community.

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“…Seafloor massive sulfides formed in the subductionrelated arc and backarc environments have attracted the attention of economic geologists since these hydrothermal fields are considered to be modern analogues of volcanogenic massive sulfide deposits on land (e.g., Fouquet et al 1993). Detailed geophysical, geomorphological, geological, mineralogical, geochemical and microbiological analyses of seafloor hydrothermal systems in the Southern Mariana Trough have been carried out within the past 20 years (e.g., Fryer 1995;Ishibashi and Urabe 1995;Ishibashi et al 2006;Kakegawa et al 2008;Kato et al 2009;Yoshikawa et al 2012;Nakamura et al 2013;Takamasa et al 2013;Ishibashi et al Chap. 23).…”

Section: Introductionmentioning

confidence: 99%

Mineralogical and Geochemical Characteristics of Hydrothermal Minerals Collected from Hydrothermal Vent Fields in the Southern Mariana Spreading Center

Ikehata

Suzuki

Shimada

et al. 2014

Subseafloor Biosphere Linked to Hydrothermal Systems

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Seafloor hydrothermal mineralization of four active hydrothermal fields (Snail, Yamanaka, Archaean and Pika sites) in the Southern Mariana Trough was investigated to clarify the mineralogical and geochemical characteristics of the hydrothermal minerals. The Snail site and the Yamanaka site are located on the crest of the backarc spreading ridge (on-axis). The Pika site sits atop an off-axial volcano, 4.9 km distant from the spreading axis, while the Archaean site sits on the flank of the spreading ridge, about 1.5 km distant from the axis. In the four hydrothermal sites, chimney and mound sulfides are composed mainly of pyrite, marcasite, sphalerite and chalcopyrite. Conduits and interstices of these sulfide minerals are filled with late barite and anhydrite. Mineralizations of off-axial hydrothermal fields have mineralogical and geochemical signatures (Fe-rich and low f S2 condition) similar to those of mineralizations at sediment-free mid-ocean ridge settings. By contrast, mineralizations of on-axial sites show distinctly Zn and Pb-rich (high f S2 condition) signatures similar to those found in arc or rifting settings. Sulfur isotopic compositions of collected sulfide minerals show a similar diversity with a mid-ocean ridge range for the off-axial sites and an island-arc range for the on-axial sites. These isotopic signatures could be explained by varying proportions of magmatic sulfur leached from the underlying volcanic rocks and reduced seawater sulfates. Keywords

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Hydrothermal Activity Related to Arc-Backarc Magmatism in the Western Pacific

Cited by 139 publications

References 120 publications

Actively forming Kuroko-type volcanic-hosted massive sulfide (VHMS) mineralization at Iheya North, Okinawa Trough, Japan

Actively forming Kuroko-type volcanic-hosted massive sulfide (VHMS) mineralization at Iheya North, Okinawa Trough, Japan

A Compilation of the Stable Isotopic Compositions of Carbon, Nitrogen, and Sulfur in Soft Body Parts of Animals Collected from Deep-Sea Hydrothermal Vent and Methane Seep Fields: Variations in Energy Source and Importance of Subsurface Microbial Processes in the Sediment-Hosted Systems

Mineralogical and Geochemical Characteristics of Hydrothermal Minerals Collected from Hydrothermal Vent Fields in the Southern Mariana Spreading Center

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