 | | Journal (article/letter/editorial) | | Hydrothermal alumina-rich clays and boehmite on the Gorda Ridge KATHERINEJ. HOWARD and MARTIN R. FISK College of...Abs~ct-Hydrothe~~ alteration of basalt on the northern Gorda Ridge produced an alteration crust up to lmm thick that...temperatureAl-rich clays recovered from the East Pacific Rise, 2 1*N with minor quartz, zeolite (phillipsite...boehmite as a major alteration mineral in a mid-ocean ridge hydrothermalenvironment. INTRODUCTION ation...activity on the northern Gorda Ridge. ALTERATION OFBASALTS at mid-ocean ridges by ci~ulation of hydrothe~~ |  | | Journal (article/letter/editorial) | | modeI hydrothermaf alteration processes at mid-ocean ridges. We have combined selected aspects ofthe...fluids at mid-ocean ridges. Some vent fIuids? in part&far NC% (EPR, 2l”N) and vent-4 QEPR, 1 l“N), however...typicai of the submarine geothermal system at mid-ocean ridges (SEYFRIED et al., 1986; BEKNDT and SEYFRIE~...INTRODUCTION ~Y~R~TH~~~~~ REACTION zones at mid-ocean ridges are characterized by high temperatures, rock...at the now numerous known sites along the East Pacific Rise (VON RAMM et al., 1985; BOWERSet al., 1988; |  | | Journal (article/letter/editorial) | | 363 [6] Hot spring deposits on the East Pacific Rise at 21 °N" preliminary description of mineralogy...inactive vent sites along the East Pacific Rise at 21°N during the RISE expedition of April, 1979. The...silica are not abundant in these deposits, although talc forms in hot chimneys from seawater Mg and hydrothermal...is found in sediments on the crest of the East Pacific Rise. Other accessory phases identified include...r o t h e r m a l heat a n d mass exchanges between convecting seawater a n d cooling oceanic crust at |  | Zeng, Zhigang, Niedermann, Samuel, Chen, Shuai, Wang, Xiaoyuan, Li, Zhaoxue (2015) Noble gases in sulfide deposits of modern deep-sea hydrothermal systems: Implications for heat fluxes and hydrothermal fluid processes. Chemical Geology, 409. 1-11 doi:10.1016/j.chemgeo.2015.05.007 | Journal (article/letter/editorial) | | from the East Pacific Rise, Mid-Atlantic Ridge, Central Indian MA Ridge, Southwest Indian Ridge, and North...and 0.1–12 ×1012 W, meaning that roughly 0.3% of ocean heat is supplied by seafloor TE high-temperature...in the MA Middle Valley of the northern Juan de Fuca Ridge (NJdFR) (Stuart et al., 1994a, b); in the...Mid-Atlantic Ridge (MAR) (Stuart et al., 1994b; Zeng et al., 2001); in the East Pacific TE Rise (EPR) near...near 13°N (Stuart et al., 1995; Jean-Baptiste and Fouquet, 1996) and 21°N CE P (Turner and Stuart, 1992; |  | Wang, Yan, Wu, Zhongwei, Sun, Xiaoming, Deng, Xiguang, Guan, Yao, Xu, Li, Huang, Yi, Cao, Kaijun (2018) He–Ar–S Isotopic Compositions of Polymetallic Sulphides from Hydrothermal Vent Fields along the Ultraslow-Spreading Southwest Indian Ridge and Their Geological Implications. Minerals, 8 (11) 512 doi:10.3390/min8110512 | Journal (article/letter/editorial) | | along the Ultraslow-Spreading Southwest Indian Ridge and Their Geological Implications Yan Wang 1,2,†...along the ultraslow-spreading Southwest Indian Ridge (SWIR). The helium, argon, and sulphur isotope compositions...number of active/inactive vent fields in the Indian Ocean. The helium concentrations and isotopic ratios in...massive sulphides from the fast-spreading East Pacific Rise (EPR), especially for three Cu–Fe-rich samples...compared to the EPR ore samples. Moreover, the majority of sulphide minerals from the Indian Ocean have much |  | | Report (volume) | | and Biologic Studies at Escanaba Trough, Gorda Ridge, Offshore Northern California JANET L. MORTON, ROBERT...and biologic studies at Escanaba Trough, Gorda Ridge, offshore northern California I Janet L. Morton...at Escanaba Trough: Geophysical results ........ 21 Janet L. Morton and Christopher G. Fox 3. Thermal...the SESCA area, Escanaba Trough, southern Gorda Ridge ................................. 131 Robert E....hydrothermal fluids from Escanaba Trough, Gorda Ridge ............................................... |  | | Book | | the Deep A Photographic Atlas of the Seafloor and Ocean Crust The deep oceans and global seafloor are truly...and fault zones in mountains a mile beneath the ocean surface, where bizarre landscapes host exotic life...components of the Earth’s ocean floor and the myriad environments found along mid-ocean ridges where new crust...Director of WHOI’s Deep Ocean Exploration Institute (DOEI), and was a Chair of the Ridge 2000 Program, a NSF-funded...NSF-funded national program studying mid-ocean ridges. Dr. Fornari is the author or co-author of over |  | | Book | | 01636083 0 geny G. Gurvich Sediments of the World Ocean Fundamental Theory of Deep-Sea Sedimentation 4V... Gurvich Metalliferous Sediments of the World Ocean Fundamental Theory of Deep-Sea Hydrothermal Sedimentation... Gurvich Metalliferous Sediments of the World Ocean Fundamental Theory of Deep-Sea Hydrothermal Sedimentation...1. Metalliferous sediments from the Southeast Pacific.7 1.1.1. Conditions of formation.7 1.1.2. Lithologic...part of the East Pacific Rise.51 1.3. Metalliferous sediments from the Juan de Fuca Ridge.61 1.4. Metalliferous |  | | Journal (article/letter/editorial) | | December I, 1980 Revised version received October 21, 1981 Mineralogical and isotopic variations observed...and crystalline rocks from the East Pacific Rise and the Mid-Atlantic Ridge provide information about the...proportions of fine-grained secondary minerals including talc, smectite, chlorite, vermiculite, actinolite, and...seawater-hydrothermal systems associated with mid-ocean ridges. This effort has focussed primarily on studies...metamorphic rocks from the Mid-Atlantic Ridge (MAR) [1,2] and the Mid-Cayman Rise [3], metal-enriched basal sediments |  | | Book | | PETROLOGY OF THE OCEAN FLOOR FURTHER TITLESIN THISSERIES 1 J.L. MERO THE M I N E R A L RESOURCES OF...METHOD I N OCEANOGRAPHY 3 E.J.F. WOOD MICROBIOLOGY O F OCEANS A N D ESTUAR IES 4 G _ . NEUMANN OCEAN CURRENTS...GEOMAGNETISM I N M A R I N E GEOLOGY 7 W.J. WALLACE THE DEVELOPMENTS OF THE CHLORINITY/SALINITY CONCEPT I N OCEANOGRAPHY...l S l T Z l N SEA-LEVEL CHANGES 9 R.H.PARKER THE STUDY OF BENTHIC COMMUNITIES 10 J.C.J. N I H O U L (Editor)...A Y E V TEMPERATURE-SALINITY ANALYSIS OF WORLD OCEAN WATERS 12 E.J. FERGUSON WOOD and R.E. JOHANNES TROPICAL |  | | Journal (article/letter/editorial) | | Sulfur in peridotites and gabbros at Lost City (30°N, MAR): Implications for hydrothermal alteration and...southern face of the Atlantis Massif (Mid-Atlantic Ridge, 30°N) were examined to better understand serpentinization...hydrothermal sites located between 10° and 40°N along the Mid-Atlantic Ridge (MAR), Rainbow, Logatchev, Ashadze...address: Laboratoire de Géosciences Marines, Institut de Physique du Globe de Paris, 4 place Jussieu...aging processes and global geochemical fluxes in ridge and subduction zone environments. In addition, the |  | | Journal (article/letter/editorial) | | and epidote buffering of cation ratios in mid-ocean ridge hydrothermal fluids: Experimental results in...constrain hydrothermal alteration processes at mid-ocean ridges. Dissolved Ca, Na, and pH for all experiments...reaction zone for “black-smoker” fluids at mid-ocean ridges is composed of only slightly altered diabase...-ascent to the seafloor. metagabbros dred8ed from mid-ocean ridges ( HUMPHRISand INTRODUCTION THOMPSON, 1978...during the most active stages of circulation at mid-ocean ridges. Interpretation of hot-spring fluid chemistry |  | | Journal (article/letter/editorial) | | sulfate during hydrothermal circulation at mid-ocean ridges Russell E. McDuff * and John M. Edmond Department...at the Galapagos Rift at 86°W and the East Pacific Rise at 21 °N. Making use of sulfate-3He systematics...analysis of hydrothermal fluids emanating from ridge axes [1,2], chemical and mineralogical studies of...of - 7 5 /~mol SO4/kcal implied a flux from the ocean of 3.75 × 1012 mol/year, comparable to the river...86°W in February-March 1979 and on the East Pacific Rise at 21 °N in November 1979, and we discuss their |  | | Journal (article/letter/editorial) | | 73-83 Talc-rich hydrothermal rocks from the St. Paul and Conrad fracture zones in the Atlantic Ocean MASSIMO...R., I-40129 Bologna, Italy 2Istituto Abstract: Talc-rich rocks covered by Fe-Mn coatings were recovered...(55°29’S-02°05’W, American-Antarctic Ridge). In both occurrences, the talc-rich rocks are associated with serpentinized...consisting of angular clasts of botryoidal/colloform talc in a subordinate foraminiferal ooze sediment. These...structures formed by the precipitation of talc at hydrothermal vents. Talc formed when seawater mixed with hydrothermal |  | | Book | | venting temperatures and venting salinities at mid-ocean ridge hydrothermal systems T. Driesner 132 Using...map subseafloor fluid flow in the ocean crust A. T. Fisher and R. N. Harris 142 The potential for abiotic...Geology, Charles University, Praha, Czech Republic R. N. Harris College of Oceanic and Atmospheric Sciences...heat flow and discharge characteristics at mid-ocean ridges is explored by Driesner. His results support...and Harris take three specific examples of mid-ocean ridge settings to explore the controls on heat loss |  | | Report (issue) | | tectonics—Addresses, essays, lectures. 2. Geology—Pacific Ocean—Addresses, essays, lectures. 3. Geology—Andes—Addresses...Kulm Divergent Boundary Tectonics of the Nazca-Pacific divergent plate boundary. David K. Rea Structure...Metalliferous-sediment deposition in time and space: East Pacific Rise and Bauer Basin, northern Nazca plate. 175...La Verne D. Kulm 545 Structures of the Nazca Ridge and continental shelf and slope of southern Peru...earlier scientific Memoir, The Geophysics of the Pacific Ocean Basin and Its Margin (American Geophysical Union |  | | Journal (article/letter/editorial) | | Centre de Gdochimie de la Surface, (Received and G~~RARD BLANC UPR CNRS no 6251, Institut de GCologie...and is divided into four subbasins called North (N), East (E), South-West (SW), and West(W). They are separated.... 2. MATERIAL AND METHODS 2.1. Material 21°20’N 21’15’N FIG. 1. Bathymetric map of the Atlantis II...location of Cores 683 and 684. SW, W, E, N: South-West, West, East, and North Basins. Contour lines have... 45 3.2 142.2 2.4 30.3 3.41 135.9 9.3 0.7 N 603 244 6.0 85 6.9 5.7 38.1 5.29 9.2 2.5 |  | Hekinian, Robert, Hoffert, Michel, Larque, Philippe, Cheminee, Jean-Louis, Stoffers, Peter, Bideau, Daniel (1993) Hydrothermal Fe and Si oxyhydroxide deposits from South Pacific intraplate volcanoes and East Pacific Rise axial and off-axial regions. Economic Geology, 88 (8) 2099-2121 doi:10.2113/gsecongeo.88.8.2099 | Journal (article/letter/editorial) | | E('(mom ic Geolol.1ff Vol. 88, 1993, pp 21)99-2121 HydrothermalFe and Si OxyhydroxideDepositsfrom SouthPacific...boundariesof the EastPacificnear 21ø N, 12050' N, and 11ø30• N. Basedon field observations and compositional...EastPacificRiseregions.Both the intraplateand the EPR depositsare associated with pillo•v lava, sheetflows...Si-enrichedoxyhydroxide precipitatesare commonconstituentsof ocean-floor deposits in a greatvarietyof geologicsettings...3o •_ •w Fe & Si OXYHYDROXIDE DEPOSITS,S. PACIFIC & EPR REGION 2101 marinehydrothermalactivity(Bonattiand |  | | Journal (article/letter/editorial) | | SPREADING CENTER HODAKA KAWAHATA* and TOSHIO FURUTA Ocean Research Institute, University of Tokyo, Tokyo 164...and 3. 1. I n t r o d u c t i o n Since the existence of hydrothermal conv e c t i o n s y s t e m s...6 ° W ( C o r l i s s e t al., 1 9 7 9 ) . T h e n h o t w a t e r © 1985 Elsevier Science Publishers...al., 1982). The longest section of a mid-oceanic ridge was thus established. The purpose of this thesis...The Gal~pagos spreading center is a divergent b o u n d a r y between the Cocos and Nazca plates and is |  | | Report (chapter) | | and 896A D. A. H . T E A G L E , J. C. A L T & A. N. H A L L I D A Y Department o f Geological Sciences...compiled into a profile for the upper 2 km of in situ ocean crust to constrain the composition and evolution...controlled by hydrothermal interactions with the ocean floor, yet the detailed mechanisms and transport...characterised strontium isotopic compositions of ocean ridge basalts (87Sr/ 86Sr~0.7025) and seawater (87Sr/...conditions of fluid-rock interaction. Alteration within ocean floor rocks is manifest by two basic phenomena: |  | | Book | | McCLAIN, J. S. & BURNETT, M. Evo lu tion or Lhe ocean crust: resu lts from recent seisn1ic experin1ents... FISK, M. R. Depths and temperatures of mid-ocean-ridge magma chambers and the composition of their source...paran1eters in ocean crust: analogue for ophiolite? .......... . SMEWl:---JG, J. D., C HRISTENSEN, N. I., BARTIJOLOMEW...oceanic upper mantle and lower crust as deduced fro,n the northern section of the On1an ophio lite .......GREGORY, R. T. Melt percolation beneath a spreading ridge: evidence from the Sen1ail peridotite, On1an .. |  | | Book | | 4 Ridge Crest Magma Chambers: A Review of Results from Marine Seismic Experiments at the East Pacific...Pacific Rise Detrick, R.S. 7 Accommodation Zones and Transfer Faults: Integral Components of Mid-Atlantic...Mid-Atlantic Ridge Extensional Systems Karson, I.A. Rooting of the Sheeted Dike Complex in the Oman Ophiolite...to Decipher Successive Magmatic Events Reuber, 1. 21 39 55 83 B) Mantle 105 The Upward Migration...Regeneration Processes in Upper Mantle of Continental and Ocean Rift Zones Dobretsov, N.L. and Ashchepkov, I.V. |  | | Report (volume) | | L O G I C A L SOCIETY SPECIAL P U B L I C A T I O N NO. 119 Manganese Mineralization: Geochemistry and...(08) 379-0444 Fax (08) 379-4634) India Affiliated East-West Press PVT Ltd G-1/16 Ansari Road New Delhi...Proterozoic sedimentary ores KULIK, D. A. & KORZHNEV, M. N. Lithological and geochemical evidence of Fe and Mn...KANG, J. K. & LUBICK, N. Iron and manganese oxide mineralization in the Pacific CRONAN, D. S. Some controls...with particular reference to the tropical South Pacific VON STACKELBERG, W. Growth history of manganese |  | | Book (edition) | | Phreatoplinian Eruptions 321 B. F. Houghton, C. J. N. Wilson, R. T. Smith, and J. S. Gilbert 513 C ONTENTS...Colin J. N. Wilson and Bruce F. Houghton Pyroclastic Fall Deposits B. F. Houghton, C. J. N. Wilson,...Deposits P A R T V I 581 A. Freundt, C. J. N. Wilson, and S. N. Carey Lahars Volcanic Interactions Volcanic...643 Deep Ocean Hydrothermal Vents 857 David A. Butterfield 663 Jon Davidson and Shan De Silva Scoria...Crises Management Peter J. Baxter 1199 Servando De La Crùz-Reyna, Roberto Meli P., and Roberto Quaas |  | | Book | | consider internal communications. Within our complex industry secrecy and competition sometimes dictates...baseline designated 10 000 m E aligned N—S. The traverse line at 11 800 m N intersects the approximate centre...the surface expression of the body, which plunges east at about 30°, roughly conformable with enclosing...terrain of the Nanambu Complex. The Cahill Formation here dips at about 30° to the east. The Carpentarian...is from 20 to 90 m below the surface. The 11 800 m N traverse crosses the whole of the local Orebody stratigraphy |
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