Arc rifting, metallogeny and microplate evolution: An integrated geodynamic, magmatic and hydrothermal study of the Bismarck Archipelago, Papua New Guinea, Cruise No. SO299, DYNAMET, 6 JUNE - 29 JULY 2023, Townsville (Australia) - Singapore.

Brandl, Philipp A. , Beier, Christoph, Abegg, Friedrich, Acuna Avendano, Octavio, Baxter, Alan T., Cuno, Patrick, Falkenberg, Jan, Galerne, Christophe , Gautreau, Louis-Maxime, Genz, Johannes, Hagedorn, Dennis, Hannington, Mark D., Hansteen, Thor H. , Heyde, Ingo, Kaufmann, Max, Klein, Johanna, Konabe, Stanis, Lange, Sabine, Maicher, Doris , Matthiessen, Torge, McInnes, Brent I. A., Panachi, Esther, Petersen, Sven , Pieper, Martin, Reeck, Konstantin, Riemer, Egor, Ruth, William, Schenk, Johanna, Striewski, Peter, Suck, Inken, Taylor, James, Vahrenkamp, Sarima, Waßmund, Leon, Wenske, Julia, Zimmer, Hannah and Zitoun, Rebecca (2023) Arc rifting, metallogeny and microplate evolution: An integrated geodynamic, magmatic and hydrothermal study of the Bismarck Archipelago, Papua New Guinea, Cruise No. SO299, DYNAMET, 6 JUNE - 29 JULY 2023, Townsville (Australia) - Singapore. Open Access . SONNE-Berichte, SO299 . UNSPECIFIED, 257 pp. DOI 10.48433/cr_so299.

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Abstract

Cruise SO299 DYNAMET from Townsville (Australia) to Singapore aimed at studying the links
between geodynamics (regional-scale plate tectonics, local structural geology and volcanism) and
metallogeny with a special emphasis on the Au-rich mineralisation on and in the vicinity of Lihir
Island, Papua New Guinea. The research programme started on 13th June and ended on 15 th July
2023, totalling to 32.5 working days within the Exclusive Economic Zone of Papua New Guinea
and international waters. Underway hydroacoustic and gravity data were additionally recorded in
international waters during the transit towards Singapore. The three main working areas targeted
the New Ireland Basin at the newly discovered Karambusel vent field (Conical Seamount) and
Mussel Cliff, the Weitin Fault area south of New Ireland, and the Mussau Ridge. We performed
>4,800 kilometers of hydroacoustic (multibeam echosounder and sub-bottom profiler) and
gravimetric surveys, twelve dives with the remotely operated vehicle (ROV) KIEL 6000 from
GEOMAR, 16 stations with the TV-guided grab, 20 chain bag dredge and 20 heat flow stations.
We recovered a total of 447 rock and 346 sediment samples and took 570 individual gas and fluid
samples. We deployed and recovered 18 ocean bottom seismometers (OBS) and 16 ocean bottom
magneto-telluric (OBMT) instruments in the vicinity of Lihir island. The wealth of samples and
data collected during the cruise and complemented by a variety of geophysical, petrological and
geochemical analyses post-cruise will aid the development of a new spatial and temporal model
of the magmatic and hydrothermal evolution in response to recent plate tectonic changes.

Document Type: Report (Cruise Report)
Additional Information: GEOMAR, FAU Erlangen-Nürnberg, BGR, Univ. Helsinki, Univ. Ottawa
Keywords: RV Sonne, SO299, DYNAMET, cruise report, geodynamics, magmatism, hydrothermal study, Bismarck Archipelago, Papua New Guinea
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS > Marine Mineralische Rohstoffe
OceanRep > GEOMAR > ZE Central Facilities > ZE-TLZ Technical and Logistics
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS
Expeditions/Models/Experiments:
Date Deposited: 29 Feb 2024 10:45
Last Modified: 07 Mar 2024 10:36
URI: https://oceanrep.geomar.de/id/eprint/60049

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