Evolution of an active sea-floor massive sulphide deposit

  title={Evolution of an active sea-floor massive sulphide deposit},
  author={Chen-Feng You and Mike J. Bickle},
Hydrothermal circulation at oceanic spreading ridges causes sea water to penetrate to depths of 2 to 3 km in the oceanic crust where it is heated to ∼400 °C before venting at spectacular ‘black smokers’. These hydrothermal systems exert a strong influence on ocean chemistry, yet their structure, longevity and magnitude remain largely unresolved. The active Transatlantic Geotraverse (TAG) deposit, at 26° N on the Mid-Atlantic Ridge, is one of the largest, oldest and most intensively studied of… 
Deep explosive volcanism on the Gakkel Ridge and seismological constraints on Shallow Recharge at TAG Active Mound
Abstract : Seafloor digital imagery and bathymetric data are used to evaluate the volcanic characteristics of the 85 E segment of the ultraslow spreading Gakkel Ridge (9 mm yr[expn -1]). Imagery
TAG hydrothermal field: A key to modern and ancient seafloor hydrothermal VMS ore-forming systems
The TAG hydrothermal field, situated in the axial valley of the slow-spreading Mid-Atlantic Ridge near 26°N, 45°W, is one of the largest and best-studied seafloor hydrothermal fields in the world.
Episodic Subseafloor Hydrothermal Activity Within the Eastern Manus Back-Arc Basin Determined by Uranium-Series Disequilibrium in Barite
The geochronology of seafloor hydrothermal activity from several mineralized, active and inactive vent fields at Suzette and Pual Ridge, eastern Manus back-arc basin, Bismarck Sea, Papua New Guinea,
Constraints on the energy and chemical balances of the modern TAG and ancient Cyprus seafloor sulfide deposits
The size, chemical composition, energy flux, and fluid composition of the TAG hydrothermal sulfide deposit at the Mid-Atlantic Ridge and the size, chemical composition and reaction zone
The oldest seafloor massive sulfide deposits at the Mid-Atlantic Ridge: 230Th/U chronology and composition
Abstract A geochronological and geochemical study on 10 samples of seafloor massive sulfides (SMS) from the inactive Peterburgskoye hydrothermal field at the Mid-Atlantic Ridge (MAR) was carried out.
Magnetic and Gravity Surface Geometry Inverse Modeling of the TAG Active Mound
Seafloor massive sulfide deposits form in remote environments, and the assessment of deposit size and composition through drilling is technically challenging and expensive. To aid the evaluation of


The internal structure of an active sea-floor massive sulphide deposit
THE hydrothermal circulation of sea water through permeable ocean crust results in rock–water interactions that lead to the formation of massive sulphide deposits. These are the modern analogues of
Chemistry of ore-forming fluids and mineral formation rates in an active hydrothermal sulfide deposit on the Mid-Atlantic Ridge
The chemical composition of diffuse effluent from the TAG hydrothermal mound, 26°N Mid-Atlantic Ridge, directly demonstrates that mixing of entrained seawater and high-temperature black smoker fluids
New age data for Mid‐Atlantic Ridge hydrothermal sites: TAG and Snakepit chronology revisited
The chronologies of TAG and Snakepit hydrothermal fields have been established using 210Pb/Pb, 230Th/234U and 14C dating. At the TAG field, a Mn-oxide record, indicative of low temperature events,
Uranium enrichment in metalliferous sediments from the Mid-Atlantic Ridge
Mid-Ocean Ridge Hydrothermal Fluxes and the Chemical Composition of the Ocean
▪ Abstract Geophysical estimates of mid-ocean ridge axial heat fluxes (2–4 × 1012 W) and of the total hydrothermal flux (9 ± 2 × 1012 W) are well established. Problems arise in calculation of water
Eight sulfide samples from eight cores from Trans-Atlantic Geotraverse (TAG) drilling areas 1, 2, 4, and 5 (ODP Leg 158) have been age dated using 210 Pb/Pb and 230 Th/ 234 U methods. In spite of the