Drilling of shallow marine sulfide-sulfate mineralisation in south-eastern Tyrrhenian Sea, Italy; Seafloor sulfides, Tyrrhenian Sea, highsulfidation; hydrothermal systems, Palinuro.

Gemmell, J. B., Petersen, Sven , Monecke, T., Hannington, Mark D., Lackschewitz, Klas, Augustin, Nico , Gibson, H., Perrin, K., Sharpe, R. and Simpson, K. (2009) Drilling of shallow marine sulfide-sulfate mineralisation in south-eastern Tyrrhenian Sea, Italy; Seafloor sulfides, Tyrrhenian Sea, highsulfidation; hydrothermal systems, Palinuro. [Paper] In: 10. Biennial SGA Meeting. , 17.-20.08.2009, Townsville, Australia . Smart Science for Exploration and Mining : proceedings of the Tenth Biennial SGA Meeting. ; pp. 438-440 .

[img]
Preview
Text
775_Gemmell_2009_DrillingOfShallowMarineSulfidesulfate_Arttagu_pubid12320.pdf - Reprinted Version

Download (154Kb)

Abstract

Semi-massive to massive sulfides with abundant late native sulfur were drilled in a shallowwater hydrothermal system in an island arc volcanic setting at the Palinuro volcanic complex in the Tyrrhenian Sea, Italy. Overall, 12.7 m of sulfide mineralisation were drilled in a sediment-filled
depression at a water depth of 630 - 650 m using the
lander-type Rockdrill I drill rig of the British Geological
Survey. Polymetallic (Zn, Pb, Sb, As, Ag) sulfides
overlie massive pyrite. The massive sulfide mineralisation contains a number of atypical minerals, including enargite-famatinite, tennantite-tetrahedrite, stibnite, bismuthinite, and Pb-,Sb-, and Ag-sulfosalts, that do not commonly occur in mid-ocean ridge massive sulfides. Analogous to subaerial epithermal deposits, the occurrence of these minerals and the presence of abundant native sulfur suggest an intermediate to high sulfidation and/or high oxididation state of the hydrothermal fluids in contrast to the near-neutral and reducing fluids from which base metal-rich massive sulfides along mid-ocean ridges typically form. Oxidised conditions during sulfide deposition are likely related to the presence of magmatic volatiles in the mineralising fluids that were derived from a degassing magma chamber below the Palinuro volcanic complex.

Document Type: Conference or Workshop Item (Paper)
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems
Refereed: Yes
Projects: Future Ocean
Date Deposited: 26 Oct 2009 12:09
Last Modified: 28 Jan 2014 11:25
URI: http://oceanrep.geomar.de/id/eprint/517

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...