Shallow Drilling of Seafloor Hydrothermal Systems Using the BGS Rockdrill: Conical Seamount (New Ireland Fore-Arc) and PACMANUS (Eastern Manus Basin), Papua New Guinea

Petersen, Sven, Herzig, Peter, Kuhn, Thomas, Monecke, T., Franz, L., Hannington, Mark D. and Gemmel, J.B. (2005) Shallow Drilling of Seafloor Hydrothermal Systems Using the BGS Rockdrill: Conical Seamount (New Ireland Fore-Arc) and PACMANUS (Eastern Manus Basin), Papua New Guinea Marine Georesources & Geotechnology, 23 (3). pp. 175-193. DOI 10.1080/10641190500192185.

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Abstract

From September to October 2002, shallow drilling, using the submersible (5 m) Rockdrill of the British Geological Survey and the German R/V Sonne revealed critical information on the subsurface nature of two distinct hydrothermal systems in the New Ireland fore-arc and the Manus Basin of Papua New Guinea. Drilling at Conical Seamount significantly extends the known surface extent of the previously discovered vein-style gold mineralization (up to 230 g/t Au) at this site. Drilling the conventional PACMANUS volcanic-hosted massive sulfide deposit recovered complexly textured massive sulfide with spectacular concentrations of gold in several core sections including 0.5 m @ 28 g/t Au, 0.35 m @ 30 g/t Au, and 0.20 m @ 57 g/t Au. Shallow drilling is a fast and cost efficient method that bridges the gap between surface sampling and deep (ODP) drilling and will become a standard practice in the future study of seafloor hydrothermal systems and massive sulfide deposits.

Document Type: Article
Keywords: Seafloor massive sulfides, shallow drilling, conical seamount, PACMANUS, gold, RV Sonne, SO166
Research affiliation: OceanRep > GEOMAR > D-DIR Directorate
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems
Refereed: Yes
DOI etc.: 10.1080/10641190500192185
ISSN: 1064-119X
Projects: IGCP Project 502
Expeditions/Models:
Date Deposited: 03 Dec 2008 16:51
Last Modified: 22 Jun 2017 10:13
URI: http://eprints.uni-kiel.de/id/eprint/6260

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