Relevant bibliographies by topics / Mid-ocean ridges

Academic literature on the topic 'Mid-ocean ridges'

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Published: 4 June 2021
Last updated: 21 February 2023

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Journal articles on the topic "Mid-ocean ridges"

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Delaney, John. "Mid‐ocean ridges." Eos, Transactions American Geophysical Union 72, no. 8 (February 19, 1991): 90. http://dx.doi.org/10.1029/eo072i008p00090-03.

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McClintock, Peter V. E. "Mid-Ocean Ridges." Contemporary Physics 57, no. 1 (December 11, 2015): 143. http://dx.doi.org/10.1080/00107514.2015.1111414.

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Collier, Jenny. "Review of ‘Mid-Ocean Ridges’." Geophysical Journal International 197, no. 3 (April 9, 2014): 1884. http://dx.doi.org/10.1093/gji/ggu041.

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Schouten, Hans, Kim D. Klitgord, and John A. Whitehead. "Segmentation of mid-ocean ridges." Nature 317, no. 6034 (September 1985): 225–29. http://dx.doi.org/10.1038/317225a0.

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Langmuir, Charles, and Donald Forsyth. "Mantle Melting Beneath Mid-Ocean Ridges." Oceanography 20, no. 1 (March 1, 2007): 78–89. http://dx.doi.org/10.5670/oceanog.2007.82.

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Cann, Joe. "Subtle minds and mid-ocean ridges." Nature 393, no. 6686 (June 1998): 625–27. http://dx.doi.org/10.1038/31347.

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Ghods, A., and J. Arkani-Hamed. "Melt migration beneath mid-ocean ridges." Geophysical Journal International 140, no. 3 (March 1, 2000): 687–97. http://dx.doi.org/10.1046/j.1365-246x.2000.00032.x.

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Humphris, Susan E. "Hydrothermal processes at mid-ocean ridges." Reviews of Geophysics 33 (1995): 71. http://dx.doi.org/10.1029/95rg00296.

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Solomon, S. C., and D. R. Toomey. "The Structure of Mid-Ocean Ridges." Annual Review of Earth and Planetary Sciences 20, no. 1 (May 1992): 329–66. http://dx.doi.org/10.1146/annurev.ea.20.050192.001553.

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Cronin, Vincent S. "Instantaneous velocity of mid-ocean ridges." Tectonophysics 230, no. 3-4 (February 1994): 151–59. http://dx.doi.org/10.1016/0040-1951(94)90132-5.

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Dissertations / Theses on the topic "Mid-ocean ridges"

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Reid, William David Kenneth. "Trophodynamics on mid-ocean ridges." Thesis, University of Newcastle Upon Tyne, 2012. http://hdl.handle.net/10443/1744.

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The global mid-ocean ridge (MOR) system is ~60 000 km long and accounts for 9% of the seafloor. Deep-sea organisms living on MOR have two potential energy sources; chemosynthesis and the downward flux of photosynthetic organic matter. This study examines the trophodynamics of benthic fauna collected from non-vent sites north and south of the Charlie-Gibb Fracture Zone (CGFZ) on the Mid-Atlantic Ridge (MAR) and hydrothermal vents fields (E2 and E9) on the East Scotia Ridge (ESR) using stable isotopes of carbon (δ13C), nitrogen (δ15N) and sulphur (δ34S). δ13C and δ34S values revealed the MAR benthos was sustained by photosynthetic primary production and no chemosynthetic food source was detected. δ15N values of benthic invertebrates were lower than the surficial sediments at the southern site but this did not occur at the northern site. Benthic invertebrates appeared to comprise a separate food chain to bentho-pelagic fishes and crustaceans but size-based trends in δ13C and δ15N revealed at certain life history stages bentho-pelagic fishes may consume benthic fauna. Size-based trends in δ13C and δ15N trends varied spatially and temporally in some bentho-pelagic fishes, which suggested differences in feeding plasticity among the species. Spatial differences among sites were observed in δ13C, δ15N and δ34S of the ESR vent fauna. These were thought to reflect differences in the vent fluid chemistry, vent derived carbon fixation pathways and incorporation of photosynthetic organic matter into the vent system depending on the species and the magnitude of the difference among sites. Size and sex were important determinants of intra-population variability in stable isotope values of three species of vent fauna but this was not consistent among sites. Abstract ii The present study revealed the importance of undertaking a tri-isotope approach to deep-sea trophic studies in order to elucidate production sources and at different sizes deep-sea organisms can link different trophic pathways.
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Morgan, Jennifer Patricia. "Constructive volcanic processes at mid-ocean ridges." Thesis, University of Leeds, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426820.

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Dusunur, Doga. "Thermal structure of Mid-Ocean Ridges (Lucky Strike, Mid-Atlantic Ridge) and magma chambers." Paris, Institut de physique du globe, 2008. http://www.theses.fr/2008GLOB0002.

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Modéliser la structure thermique de la croûte océanique est une étape importante pour comprendre la création de la croûte océanique qui couvre les deux tiers de la surface de notre planète. La production magmatique à l'axe de la dorsale et le refroidissement de la lithosphère océanique en fonction du temps et de l'espace sont des facteurs clés pour comprendre la création de la croûte océanique, qui est déterminée en premier lieu par la structure thermique des dorsales. Les modèles thermiques classiques ne prédisent pas l'existence de chambres magmatiques stationnaires le long des dorsales qui ont un taux d'expansion inférieur à 30 mm/an. L'identification par imagerie sismique d'une chambre magmatique sous le volcan et le champ hydrothermal de Lucky Strike sur la dorsale médio-Atlantique représente une opportunité unique d'étudier la structure thermique des dorsales lentes. Nous présentons ici conjointement des données microsismiques et une modélisation thermique qui nous permettent d'éclaircir la nature des chambres magmatiques éphémères aux dorsales lentes, de contraindre les échelles de temps associées aux changements dans l'alimentation magmatique et les paramètres nécessaires à l'existence d'une chambre magmatique, et nous renseignent sur les différents mécanismes qui peuvent conduire au refroidissement et à la disparition d'une chambre magmatique. Les résultats de l'analyse microsismique, de la modélisation thermique et les contraintes temporelles dérivées des contraintes géologiques suggèrent qu'il existe un apport focalisé au centre du segment, et ce de façon régulière, et que cet apport est maintenu sur des périodes de temps étendu, pouvant conduire à une chambre magmatique durable. Cette thèse, tout en traitant des processus actifs au segment Lucky Strike, fournit un modèle plus général pour comprendre et étudier d'autres segments de dorsales lentes, et comprendre comment se forme la croûte océanique le long de ces segments
Modeling the thermal state of the oceanic crust is an important task to understand the construction of oceanic crust which covers two thirds of the surface of our planet. The interplays among magma delivery to the axis and cooling of the oceanic lithosphere as a function of both space and time are key factors to understand the creation of the oceanic crust, which is primarily determined by the overall thermal structure of mid-ocean ridges. Classical thermal models do not predict steady state axial magma chambers (AMCs) along mid-ocean ridges at spreading rates less than 30 mm/year. The identification and seismic imaging of an axial magma chamber underlying the Lucky Strike central volcano and hydrothermal field at the Mid-Atlantic Ridge provides a unique opportunity to study the thermal structure of slow spreading ridges. Here we present coupled microseismic data and thermal modeling to provide insight on the nature of ephemeral magma chambers at slow-spreading ridges, to constrain the timescales associated with changes in melt supply and the parameters that can create them, and to shed light on the different mechanisms that can result on the cooling and disappearance of these structures. Both the coupled microseismic and thermal modeling results, and the time-constraints derived from the geological constraints put forward, suggest that focused melt supply to the segment center is required regularly, and that this supply is maintained over extended periods of time, that can lead to a durable magma chamber. This thesis, while focusing on the processes occurring at the Lucky Strike, provide a more general template to both understand and study other slow-spreading ridge segments, and to gain insight on how the oceanic crust is formed along them
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Turner, Ian Mark. "Crustal accretionary processes at mid-ocean ridges - Valu Fa Ridge, Lau Basin." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/5002/.

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The structure of oceanic crust is surprisingly uniform, which suggests that crustal accretionary processes at mid-ocean ridges must be broadly similar, despite their different spreading rates and seafloor morphologies. Seismic studies have revealed the presence of sub-axial magma chambers at fast, slow and intermediate spreading ridges, but constraints on their shape and size are generally restricted to the fast spreading East Pacific Rise. The aim of this study is to compare the processes of crustal accretion at fast, slow and intermediate ridges by investigating the detailed crustal structure and magma chamber geometry of a magmatically active intermediate spreading ridge, the Valu Fa Ridge. A multidisciplinary geophysical experiment was conducted over the Central Valu Fa Ridge and its overlap with the Northern Valu Fa Ridge during R/V Maurice Swing Cruise EW9512, and wide-angle seismic data, recorded on a set of digital ocean bottom seismometers, were used to generate velocity-depth models on two across-axis, two along-axis and two axis-parallel profiles. These models were further constrained by modelling of the normal incidence seismic and gravity data and the resulting combined models of crustal structure were interpreted to reveal that a composite magma chamber exists beneath the Valu Fa Ridge crest. The magma chamber consists of a thin, narrow (1-1.5 km) melt lens, with an interconnected melt fraction, overlying a wider (-4 km) region of hot rock or low melt fraction. A reflection from the top of the melt lens is identified on both the normal incidence seismic and wide-angle seismic data and delay- time modelling indicates that velocities as high as 5.5 km s(^-1) are achieved -250 m below the top of the melt lens. The main body of the magma chamber corresponds to the region of hot rock below the melt lens and is delineated by anomalously low velocities, extending down through seismic layer 3 to within 1.5-2 km of the Moho. Moho reflections from beneath the overlapping spreading centre and a low on the mantle Bouguer anomaly map implies that this region is currently, or has recently been, the site of enhanced magmatism. This observation is contrary to popular models of ridge segmentation and melt delivery. The transition from pre-rift crust (both island arc and back-arc crust) to post-rift material, marked by considerable thinning of seismic layer 2, has also been uniquely identified in this study and describes the limit of VFR-generated crust. The size and temporal stability of magma chambers are largely dependent on their magma budget and the Valu Fa Ridge magma chamber model, developed as part of this study, may bridge the gap between the large, long-lived magma chambers identified at the East Pacific Rise and the more transitory magma chambers proposed at slow spreading ridges. Melt ascends as small isolated pockets through the main body of the magma chamber at the Valu Fa Ridge and resides in the melt lens until eruption. Seismic layer 2 is constructed solely from material 'erupted' from the melt lens, with the main body of the magma chamber cooling to form seismic layer 3. Convection currents, induced by large thermal gradients at the sides of the magma chamber, both accelerate the cooling process, thus limiting its size, and helps to generate the thick layered sequences as observed in ophiolite studies. The entire crust is emplaced within the axial region and a distinct Moho is formed at -0 Ma.
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Scott, Jameson Lee. "Petrological Constraints on Magma Plumbing Systems along Mid-Ocean Ridges." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1322599745.

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Pasini, Valerio. "Biopetrology of the hydrating mantle along mid ocean ridges." Paris, Institut de physique du globe, 2013. http://www.theses.fr/2013GLOB0901.

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Cooper, Matthew John. "Geochemical investigations of hydrothermal fluid flow at mid-ocean ridges." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.441508.

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Neves, Maria C. "Models of stress at mid-ocean ridges and their offsets." Thesis, Durham University, 2000. http://etheses.dur.ac.uk/4408/.

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This thesis aims to investigate the stresses at mid-ocean ridge offsets, and particularly at the particular class of offsets represented by oceanic microplates. Amongthese, the Easter microplate is one of the best surveyed. This thesis first studies the stress field associated with mid-ocean ridges and simple types of ridge offsets, and then uses the stress field observed at Easter to constrain the driving mechanism of microplates. Two-dimensional finite element modelling is used to predict the lithospheric stress indicators, which are then compared with observations. Extensional structures at high angles (> 35 ) to ridge trends are often observed at ridge-transform intersections and non-tranform offsets, but remained unexplained until now. This study proposes that the topographic loading created by the elevation of mid-ocean ridges relative to old seafloor is a source of ridge parallel tensile stresses, and shows they can be explained by the rotation of ridge parallel tensile stresses at locked offsets. The elasto-plastic rheology is used to investigate the evolution of normal faults near mid-ocean ridges. It is shown that variations in the lithospheric strength, caused entirely by variations in the brittle layer thickness, can account for the observed variations in fault character with spreading rate and along-axis position. Plasticity is shown to prevent the achievement of large fault throws in thin brittle layers. Consequently, it may be important at fast spreading ridges. A new dynamic model is proposed for Easter microplate. It mainly consists of: 1) driving forces along the East and West Rifts, resulting from the combination of a regional tensile stress with an increasing ridge strength towards rift tips, 2) mantle basal drag resisting the microplate rotation, and contributing with less than 20% to the total resisting torque, and 3) resisting forces along the northern and southern boundaries. To explain both the earthquake focal mechanism evidence and theexistence of compressional ridges in the Nazca plate, the boundary conditions alongthe northern boundary are required to change with time, from completely locked tolocked in the normal direction only. This study does not invalidate the microplate kinematic model proposed by Schouten et al. (1993), but shows that normal resisting forces along the northern and southern boundaries of Easter microplate must exist in order to explain the stress observations. Also, it suggests that ridge strength variations play an important role in the dyamics of mid-ocean ridge overlap regions.
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Scott, Jameson Lee. "Towards a Petrologically Constrained Thermal Model of Mid-Ocean Ridges." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1496397674423802.

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Copley, Jonathan Timothy Peter. "Ecology of deep-sea hydrothermal vents." Thesis, University of Southampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246235.

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Books on the topic "Mid-ocean ridges"

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German, C. R., J. Lin, and L. M. Parson, eds. Mid-Ocean Ridges. Washington, D. C.: American Geophysical Union, 2004. http://dx.doi.org/10.1002/9781118665879.

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M, Sinton John, International Association of Volcanology and Chemistry of the Earth's Interior., and IUGG Union Symposium (9th : 1987 : Vancouver, B.C.), eds. Evolution of mid ocean ridges. Washington, DC, U.S.A: American Geophysical Union, 1989.

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Sinton, John M., ed. Evolution of Mid Ocean Ridges. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/gm057.

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Kaihatsukyoku, Japan Kagaku Gijutsuchō Kenkyū. Kairei ni okeru enerugī, busshitsu frakkusu no kaimei ni kansuru chōsa hōkokusho. [Tokyo]: Kagaku Gijutsuchō Kenkyū Kaihatsukyoku, 1993.

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Japan. Kagaku Gijutsuchō. Kenkyū Kaihatsukyoku. Kairei ni okeru enerugī busshitsu furakkusu no kaimei ni kansuru kokusai kyōdō kenkyū (dai 1-ki Heisei 5--7-nendo) seika hōkokusho. [Tokyo]: Kagaku Gijutsuchō Kenkyū Kaihatsukyoku, 1997.

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1955-, Buck W. Roger, ed. Faulting and magmatism at mid-ocean ridges. Washington, D.C: American Geophysical Union, 1998.

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Roger Buck, W., Paul T. Delaney, Jeffrey A. Karson, and Yves Lagabrielle, eds. Faulting and Magmatism at Mid-Ocean Ridges. Washington, D. C.: American Geophysical Union, 1998. http://dx.doi.org/10.1029/gm106.

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Wilcock, William S. D., Edward F. DeLong, Deborah S. Kelley, John A. Baross, and S. Craig Cary, eds. The Subseafloor Biosphere at Mid-Ocean Ridges. Washington, D. C.: American Geophysical Union, 2004. http://dx.doi.org/10.1029/gm144.

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Morgan, Jason Phipps, Donna K. Blackman, and John M. Sinton, eds. Mantle Flow and Melt Generation at Mid-Ocean Ridges. Washington, D. C.: American Geophysical Union, 1992. http://dx.doi.org/10.1029/gm071.

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Georgen, Jennifer E. Interactions between mantle plumes and mid-ocean ridges: Constraints from geophysics, geochemistry, and geodynamical modeling. Woods Hole, Mass: Woods Hole Oceanographic Institution, 2001.

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Book chapters on the topic "Mid-ocean ridges"

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Frisch, Wolfgang, Martin Meschede, and Ronald Blakey. "Mid-ocean ridges." In Plate Tectonics, 59–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-76504-2_5.

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Wilson, Marjorie. "Mid-ocean ridges." In Igneous Petrogenesis, 101–50. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-94-010-9388-0_5.

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Schmincke, Hans-Ulrich. "Mid-Ocean Ridges." In Volcanism, 59–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-18952-4_5.

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Pinti, Daniele L. "Mid-Ocean Ridges." In Encyclopedia of Astrobiology, 1586–87. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_1874.

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Pinti, Daniele. "Mid-Ocean Ridges." In Encyclopedia of Astrobiology, 1061–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_1874.

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Frisch, Wolfgang, Martin Meschede, and Ronald C. Blakey. "Mid-ocean Ridges." In Springer Textbooks in Earth Sciences, Geography and Environment, 69–86. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-88999-9_5.

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Delaney, John. "Mid-Ocean Ridges." In Geophysics News 1990, 3–4. Washington, D.C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/sp029p0003.

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Mitchell, Neil C. "Mid-ocean Ridges." In Submarine Geomorphology, 349–65. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57852-1_18.

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Pinti, Daniele L. "Mid-Ocean Ridges." In Encyclopedia of Astrobiology, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_1874-3.

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German, Christopher R., and Jian Lin. "The Thermal Structure of the Oceanic Crust, Ridge-Spreading and Hydrothermal Circulation: How Well do we Understand their Inter-Connections?" In Mid-Ocean Ridges, 1–18. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/148gm01.

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Conference papers on the topic "Mid-ocean ridges"

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Lissenberg, Johan, Matthew Loocke, George Cooper, and Christopher MacLeod. "Magma reservoir evolution at fast-spreading mid-ocean ridges." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.5763.

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Koepke, Juergen, Dominik Mock, and Chao Zhang. "Processes in Crystal Mushes Under Fast-Spreading Mid-Ocean Ridges." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.1344.

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Paduan, Jennifer B., David A. Clague, David W. Caress, and Hans Thomas. "High-resolution AUV mapping and ROV sampling of mid-ocean ridges." In OCEANS 2016 MTS/IEEE Monterey. IEEE, 2016. http://dx.doi.org/10.1109/oceans.2016.7761264.

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Kinsey, James C., Maurice A. Tivey, and Dana R. Yoerger. "Toward high-spatial resolution gravity surveying of the mid-ocean ridges with autonomous underwater vehicles." In OCEANS 2008. IEEE, 2008. http://dx.doi.org/10.1109/oceans.2008.5152005.

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John, Barbara, and Michael J. Cheadle. "OCEANIC CORE COMPLEXES: A POORLY UNDERSTOOD MODE OF EXTENSION AT SLOW SPREAD MID-OCEAN RIDGES." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-357578.

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Schäfer, Wiebke, Manuel Keith, Marcel Regelous, Francois Holtz, and Reiner Klemd. "Trace elements in magmatic sulphide droplets from island arcs, back-arc basins and mid-ocean ridges." In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.12894.

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Nimis, Paolo, Luca Toffolo, Gennady Tret'yakov, Irina Melekestseva, and Victor Beltenev. "What controls the geochemical variability of massive sulfide deposits on mid-ocean ridges? Indications from multivariate statistical analysis." In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.11193.

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Strmic Palinkas, Sabina, Rolf B. Pedersen, and Fredrik Sahlström. "Sulfide Mineralization and Fluid Inclusion Characteristics of Active Ultramafic- and Basalt-Hosted Hydrothermal Vents Located along the Arctic Mid-Ocean Ridges (AMOR)." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2472.

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Koepke, Juergen, Artur Engelhardt, and Lydéric France. "Felsic veins in gabbros of the lower crust from slow-spreading mid-ocean ridges – evidence for deep percolating of hydrothermal fluids in the magmatic regime." In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.11785.

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Hernandez, Lindsey, Jameson Scott, Kenneth Peterman, and Michael Barton. "PARTIAL PRESSURES OF CRYSTALLIZATION AND OXYGEN FUGACITIES FOR THE JUAN DE FUCA RIDGE, VOLCAN DE FUEGO AND VOLCAN DE PACAYA (GUATEMALA): A COMPARATIVE STUDY OF THE DEPTHS OF MAGMA STORAGE AND REDOX CONDITIONS FOR MID-OCEAN RIDGES AND ARC VOLCANOES." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-337888.

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Reports on the topic "Mid-ocean ridges"

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Mueller, C., S. J. Piercey, M. G. Babechuk, and D. Copeland. Stratigraphy and lithogeochemistry of rocks from the Nugget Pond Deposit area, Baie Verte Peninsula, Newfoundland. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328989.

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Stratigraphic and lithogeochemical data were collected from selected drill core from the Nugget Pond gold deposit in the Betts Cove area, Newfoundland. The stratigraphy consists of a lower unit of basaltic rocks that are massive to pillowed (Mount Misery Formation). This is overlain by sedimentary rocks of the Scrape Point Formation that consist of lower unit of turbiditic siltstone and hematitic cherts/iron formations (the Nugget Pond member); the unit locally has a volcaniclastic rich-unit at its base and grades upwards into finer grained volcaniclastic/turbiditic rocks. This is capped by basaltic rocks of the Scrape Point Formation that contain pillowed and massive mafic flows that are distinctively plagioclase porphyritic to glomeroporphyritic. The mafic rocks of the Mount Misery Formation have island arc tholeiitic affinities, whereas Scrape Point Formation mafic rocks have normal mid-ocean ridge (N-MORB) to backarc basin basalt (BABB) affinities. One sample of the latter formation has a calc-alkalic affinity. All of these geochemical features are consistent with results and conclusions from previous workers in the area. Clastic sedimentary rocks and Fe-rich sedimentary rocks of the Scrape Point Formation have features consistent with derivation from local, juvenile sources (i.e., intra-basinal mafic rocks). The Scrape Point Formation sedimentary rocks with the highest Fe/Al ratios, inferred to have greatest amount of hydrothermally derived Fe, have positive Ce anomalies on Post-Archean Australian Shale (PAAS)-normalized trace element plots. These features are consistent with having formed via hydrothermal venting into an anoxic/ sub-oxic water column. Further work is needed to test whether these redox features are a localized feature (i.e., restricted basin) or a widespread feature of the late Cambrian-early Ordovician Iapetus Ocean, as well as to delineate the role that these Fe-rich sedimentary rocks have played in the localization of gold mineralization within the Nugget Pond deposit.
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Scanlan, E. J., M. Leybourne, D. Layton-Matthews, A. Voinot, and N. van Wagoner. Alkaline magmatism in the Selwyn Basin, Yukon: relationship to SEDEX mineralization. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328994.

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Several sedimentary exhalative (SEDEX) deposits have alkaline magmatism that is temporally and spatially associated to mineralization. This report outlines interim data from a study of potential linkages between magmatism and SEDEX mineralization in the Selwyn Basin, Yukon. This region is an ideal study site due to the close spatial and temporal relationships between SEDEX deposits and magmatism, particularly in the MacMillan Pass, where volcanic rocks have been drilled with mineralization at the Boundary deposit. Alkaline volcanic samples were analysed from the Anvil District, MacMillan Pass, Keno-Mayo and the Misty Creek Embayment in the Selwyn Basin to characterise volcanism and examine the relationship to mineralization. Textural and field relationships indicate a volatile-rich explosive eruptive volcanic system in the MacMillan Pass region in comparison to the Anvil District, which is typically effusive in nature. High proportions of calcite and ankerite in comparison to other minerals are present in the MacMillan system. Cathodoluminescence imaging reveals zoning and carbonate that displays different luminescent colours within the same sample, likely indicating multiple generations of carbonate precipitation. Barium contents are enriched in volcanic rocks throughout the Selwyn Basin, which is predominately hosted by hyalophane with rare barite and barytocalcite. Thallium is positively correlated with Ba, Rb, Cs, Mo, As, Sb and the calcite-chlorite-pyrite index and is negatively correlated with Cu. Anvil District samples display a trend towards depleted mid-ocean ridge mantle on a plot of Ce/Tl versus Th/Rb. Hydrothermal alteration has likely led to the removal of Tl from volcanic rocks in the region. Ongoing research involves: i) the analysis of Sr, Nd, Pb and Tl isotopes of volcanic samples; ii) differentiating magmatic from hydrothermal carbonate using O, C and Sr isotopes; iii) examining sources of Ba in the Selwyn Basin; iv) and constraining age relationships through U-Th-Pb geochronology.
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3

Knowledge summary, A deep-sea experiment on carbon dioxide storage in oceanic crust. CDRmare, 2022. http://dx.doi.org/10.3289/cdrmare.20.

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On Iceland, water enriched with carbon dioxide has been injected into the upper ocean crust since 2014 – and successfully. The carbon dioxide mineralises within a short time and is firmly bound for millions of years. However, since ocean crust only rises above sea level in a few places on Earth, researchers are currently investigating the option of injecting carbon dioxide into ocean regions where huge areas of suitable basalt crust lie at medium to great water depths. One possible advantage: In the deep sea subsurface, the carbon dioxide would either be stable as a liquid or dissolve in the seawater circulating in the rock. Due to the high pressure, both the liquid carbon dioxide and the carbon dioxide-water mixture would be heavier than seawater, making leakage from the underground unlikely. But would carbon dioxide storage in the deep sea subsurface be technically feasible and ultimately also economically viable? The research mission CDRmare provides answers – with the help of the world's first deep-sea research experiment on carbon dioxide storage on cooled flanks of the Mid-Atlantic Ridge.
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4

A deep-sea experiment on carbon dioxide storage in oceanic crust. CDRmare, 2022. http://dx.doi.org/10.3289/cdrmare.21.

Full text
Abstract:
On Iceland, water enriched with carbon dioxide has been injected into the upper ocean crust since 2014 – and successfully. The carbon dioxide mineralises within a short time and is firmly bound for millions of years. However, since ocean crust only rises above sea level in a few places on Earth, researchers currently investigate the option of injecting carbon dioxide into ocean regions where huge areas of suitable basalt crust lie at medium to great water depths. One possible advantage: In the deep sea subsurface, the carbon dioxide would either be stable as a liquid or dissolve in the seawater circulating in the rock. Due to the high pressure, both the liquid carbon dioxide and the carbon dioxide-water mixture would be heavier than seawater, making leakage from the underground unlikely. But would carbon dioxide storage in the deep sea subsurface be technically feasible and ultimately also economically viable? The research mission CDRmare provides answers – with the help of the world's first deep-sea research experiment on carbon dioxide storage on cooled flanks of the Mid-Atlantic Ridge.
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