Formation of massive sulfide ore deposits on the seafloor-constraints from numerical heat and fluid flow modeling

C. Schardt, J. Yang, R. Large

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Numerical simulations of seafloor hydrothermal systems based on the Lau back-arc basin were carried out to investigate conditions that lead to the formation of economic massive sulfide ore deposits in seafloor environments. Fluid discharge behavior, fluid exit temperatures and fluid velocities depend primarily on rock and fault properties and to a lesser degree on fault distribution and surface/basement topography. Ideal conditions promoting vigorous hydrothermal convection and effective leaching of base metals are found in highly permeable fresh rocks with an effective fault system. High-temperature (350-400 °C), high-velocity (>5 × 10-7 m/s) hydrothermal fluids capable of forming significant massive sulfide ore bodies occur near topographic highs on the flanks of the basin structure and significant base metal ore bodies (>1 Mt ore-grade material) can be formed in 700-3000 years with fluids containing 10 ppm combined base metals and a 10% deposition efficiency.

Original languageEnglish (US)
Pages (from-to)257-259
Number of pages3
JournalJournal of Geochemical Exploration
Volume78-79
DOIs
StatePublished - Jan 1 2003

Fingerprint

Ore deposits
flow modeling
Sulfides
massive sulfide
ore deposit
heat flow
fluid flow
Flow of fluids
seafloor
base metal
Heat transfer
Fluids
fluid
Ores
ore body
Metals
ore grade
Rocks
hydrothermal system
hydrothermal fluid

Keywords

  • Lau basin
  • Massive sulfides
  • Numerical modeling
  • Topography

Cite this

Formation of massive sulfide ore deposits on the seafloor-constraints from numerical heat and fluid flow modeling. / Schardt, C.; Yang, J.; Large, R.

In: Journal of Geochemical Exploration, Vol. 78-79, 01.01.2003, p. 257-259.

Research output: Contribution to journalArticle

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