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2015 in Nature GeoscienceIF: 14.39
Jeffrey A. Hawkes11
Estimated H-index: 11
(Max Planck Society),
Pamela E. Rossel9
Estimated H-index: 9
(Max Planck Society)
+ 8 AuthorsThorsten Dittmar50
Estimated H-index: 50
(Max Planck Society)
Oceanic dissolved organic carbon (DOC) is an important carbon pool, similar in magnitude to atmospheric CO2, but the fate of its oldest forms is not well understood. Hot hydrothermal circulation may facilitate the degradation of otherwise un-reactive dissolved organic matter, playing an important role in the long-term global carbon cycle. The oldest, most recalcitrant forms of DOC, which make up most of oceanic DOC, can be recovered by solid-phase extraction. Here we present measur...
29 Citations Source Cite
2015 in Nature CommunicationsIF: 12.35
Dustin Winslow5
Estimated H-index: 5
(University of California, Santa Cruz),
Andrew T. Fisher42
Estimated H-index: 42
Most seafloor hydrothermal circulation occurs far from the magmatic influence of mid-ocean ridges, driving large flows of water, heat and solutes through volcanic rock outcrops on ridge flanks. Here we create three-dimensional simulations of ridge–flank hydrothermal circulation, flowing between and through seamounts, to determine what controls hydrogeological sustainability, flow rate and preferred flow direction in these systems. We find that sustaining flow between ...
16 Citations Source Cite
2014 in NatureIF: 41.58
Jörg Hasenclever7
Estimated H-index: 7
,
Sonja Theissen-Krah3
Estimated H-index: 3
+ 4 AuthorsColin W. Devey29
Estimated H-index: 29
Hydrothermal flow at oceanic spreading centres accounts for about ten per cent of all heat flux in the oceans and controls the thermal structure of young oceanic plates. It also influences ocean and crustal chemistry, provides a basis for chemosynthetic ecosystems, and has formed massive sulphide ore deposits throughout Earth’s history. Despite this, how and under what conditions heat is extracted, in particular from the lower crust, remains largely unclear. Here we present high-resolutio...
33 Citations Download PDF Cite
Andreas Teske54
Estimated H-index: 54
(University of North Carolina at Chapel Hill),
Dirk de Beer54
Estimated H-index: 54
(Max Planck Society)
+ 9 AuthorsBarbara J. MacGregor20
Estimated H-index: 20
(University of North Carolina at Chapel Hill)
The hydrothermal mats, mounds and chimneys of the southern Guaymas Basin are the surface expression of complex subsurface hydrothermal circulation patterns. In this overview we document the most frequently visited features of this hydrothermal area with photographs, temperature measurements, and selected geochemical data; many of these distinct habitats await characterization of their microbial communities and activities. Microprofiler deployments on microbial mats an...
17 Citations Source Cite
Marc Neveu7
Estimated H-index: 7
(Arizona State University),
Steven Joseph Desch27
Estimated H-index: 27
(Arizona State University),
Julie C. Castillo-Rogez23
Estimated H-index: 23
(California Institute of Technology)
Observations and models of Ceres suggest that its evolution was shaped by interactions between liquid water and silicate rock. Hydrothermal processes in a heated core require both fractured rock and liquid. Using a new core cracking model coupled to a thermal evolution code, we find volumes of fractured rock always large enough for significant interaction to occur. Therefore, liquid persistence is key. It is favored by antifreezes such as ammonia, by silicate dehydration which releases li...
18 Citations Source Cite
Robert P. Lowell29
Estimated H-index: 29
(Virginia Tech)
The Lost City Hydrothermal Field on the Atlantis Massif is an off-axis hydrothermal system, hosted in serpentinized ultramafic and metagabbroic rocks, that discharges through high-permeability faults and fractures. High-pH fluids vent through carbonate chimneys with temperatures ranging between 24°C and 91°C, and vent fluid geochemistry indicates quantitative removal of magnesium and water-rock reactions consistent with heating to between 250°C and 300°C, conductive cooling, and mi...
6 Citations Source Cite
Sonja Theissen-Krah3
Estimated H-index: 3
,
Lars Rüpke18
Estimated H-index: 18
,
Jörg Hasenclever7
Estimated H-index: 7
Hydrothermal convection at mid-ocean ridges links the ocean's long-term chemical evolution to solid earth processes, forms hydrothermal ore deposits, and sustains the unique chemosynthetic vent fauna. Yet the depth extent of hydrothermal cooling and the inseparably connected question of how the lower crust accretes remain poorly constrained. Here based on coupled models of crustal accretion and hydrothermal circulation, we provide new insights into which modes ...
7 Citations Source Cite
Rachel M. Lauer2
Estimated H-index: 2
(University of Calgary),
Andrew T. Fisher42
Estimated H-index: 42
(University of California, Santa Cruz),
Dustin Winslow5
Estimated H-index: 5
(University of California, Santa Cruz)
Abstract We present results from three-dimensional, transient, fully coupled simulations of fluid and heat transport on a ridge flank in fast-spread ocean crust. The simulations quantify relationships between rates of fluid flow, the extent of advective heat extraction, the geometry of crustal aquifers and outcrops, and crustal hydrologic parameters, with the goal of simulating conditions similar to those seen on 18–24 M.y. old seafloor of the Cocos plate, offshore Costa Rica. Extensive surveys ...
1 Citations Source Cite
David L. Williams4
Estimated H-index: 4
(Woods Hole Oceanographic Institution),
R. P. Von Herzen29
Estimated H-index: 29
(Woods Hole Oceanographic Institution)
+ 1 AuthorsRoger N. Anderson9
Estimated H-index: 9
(University of California, San Diego)
Summary The spatial pattern of cooling near a spreading ridge crest was investigated with a suite of 71 precisely-navigated heat-flow stations on the Galapagos spreading centre, East Pacific, near 86"W longitude. Stations are on crust less than 1.0 My old on which bathymetry and sediment distribution are well known. Values vary from near zero to greater than 30 HFU (10-6 cal cm-2 s-1). The average over the entire region is significantly less than that predicted by theoretical conduction models o...
290 Citations Source Cite
Matthew Wilks3
Estimated H-index: 3
(University of Bristol),
J-Michael Kendall13
Estimated H-index: 13
(University of Bristol)
+ 5 AuthorsTulu Bedada1
Estimated H-index: 1
(Addis Ababa University)
The silicic volcanic centres of the Main Ethiopian Rift (MER) play a central role in facilitating continental rifting. Many of these volcanoes host geothermal resources and are located in heavily populated regions. InSAR studies have shown several are deforming, but regional seismic networks have detected little seismicity. A local network of 12 seismometers was deployed at Aluto Volcano from 2012 to 2014, and detected 2142 earthquakes within a 24-month period. We locate the events using a 1D ve...
15 Citations Source Cite