Discovery of new hydrothermal vent sites in Brans¢eld Strait, Antarctica
We carried out a search for hydrothermal vents in the Central Basin of Bransfield Strait, Antarctica. The ZAPS (zero angle photon spectrometer) chemical sensor and instrument package (Oregon State University), OFOS (ocean-floor observation system) camera sled and TVG (TV-grab) (GEOMAR) were used to...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.517.2476 2023-05-15T13:56:38+02:00 Discovery of new hydrothermal vent sites in Brans¢eld Strait, Antarctica G. P. Klinkhammer A C. S. Chin A R. A. Keller A A. Da«hlmann B H. Sahling B G. Sarthou B S. Petersen C F. Smith D C. Wilson E The Pennsylvania State University CiteSeerX Archives 2001 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.517.2476 http://www.science.oregonstate.edu/~kellerr/Klinkhammeretal01BSvents.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.517.2476 http://www.science.oregonstate.edu/~kellerr/Klinkhammeretal01BSvents.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.science.oregonstate.edu/~kellerr/Klinkhammeretal01BSvents.pdf text 2001 ftciteseerx 2016-01-08T09:55:35Z We carried out a search for hydrothermal vents in the Central Basin of Bransfield Strait, Antarctica. The ZAPS (zero angle photon spectrometer) chemical sensor and instrument package (Oregon State University), OFOS (ocean-floor observation system) camera sled and TVG (TV-grab) (GEOMAR) were used to explore the water column and underlying seafloor. These operations were supplemented with a series of dredges. Hydrothermal plumes over Hook Ridge at the eastern end of the basin are confined to the E ridge crest and SE flank. The plumes are complex and sometimes contain two turbidity maxima one widespread feature centered at 1150 m and a smaller, more localized but broad maximum at 600^800 m. We traced the source of the shallower plume to a sunken crater near the ridge crest using sensors on the ZAPS instrument package. Subsequently two TV-grabs from the crater brought back hot, soupy sediment (42^49‡C) overlain by hard, siliceous crusts and underlain by a thick layer of volcanic ash. We also recovered chimney fragments whose texture and mineralogy indicate venting temperatures in excess of 250‡C. Native sulfur and Fe-sulfides occur in fractures and porous layers in sediment from throughout the area. Pore water data from the crater site are consistent with venting into a thin sediment layer and indicate phase separation of fluids beneath Hook Ridge. The source of the deeper plumes at Hook Ridge has yet to be located. We also explored a series of three parallel volcanic ridges west of Hook Ridge called Three Sisters. We detected water column anomalies indicative of venting with Text Antarc* Antarctica Bransfield Strait Unknown Bransfield Strait Central Basin ENVELOPE(178.000,178.000,-72.300,-72.300) Hook Ridge ENVELOPE(-143.667,-143.667,51.500,51.500) Three Sisters ENVELOPE(-68.470,-68.470,-71.441,-71.441) |
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ftciteseerx |
language |
English |
description |
We carried out a search for hydrothermal vents in the Central Basin of Bransfield Strait, Antarctica. The ZAPS (zero angle photon spectrometer) chemical sensor and instrument package (Oregon State University), OFOS (ocean-floor observation system) camera sled and TVG (TV-grab) (GEOMAR) were used to explore the water column and underlying seafloor. These operations were supplemented with a series of dredges. Hydrothermal plumes over Hook Ridge at the eastern end of the basin are confined to the E ridge crest and SE flank. The plumes are complex and sometimes contain two turbidity maxima one widespread feature centered at 1150 m and a smaller, more localized but broad maximum at 600^800 m. We traced the source of the shallower plume to a sunken crater near the ridge crest using sensors on the ZAPS instrument package. Subsequently two TV-grabs from the crater brought back hot, soupy sediment (42^49‡C) overlain by hard, siliceous crusts and underlain by a thick layer of volcanic ash. We also recovered chimney fragments whose texture and mineralogy indicate venting temperatures in excess of 250‡C. Native sulfur and Fe-sulfides occur in fractures and porous layers in sediment from throughout the area. Pore water data from the crater site are consistent with venting into a thin sediment layer and indicate phase separation of fluids beneath Hook Ridge. The source of the deeper plumes at Hook Ridge has yet to be located. We also explored a series of three parallel volcanic ridges west of Hook Ridge called Three Sisters. We detected water column anomalies indicative of venting with |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
G. P. Klinkhammer A C. S. Chin A R. A. Keller A A. Da«hlmann B H. Sahling B G. Sarthou B S. Petersen C F. Smith D C. Wilson E |
spellingShingle |
G. P. Klinkhammer A C. S. Chin A R. A. Keller A A. Da«hlmann B H. Sahling B G. Sarthou B S. Petersen C F. Smith D C. Wilson E Discovery of new hydrothermal vent sites in Brans¢eld Strait, Antarctica |
author_facet |
G. P. Klinkhammer A C. S. Chin A R. A. Keller A A. Da«hlmann B H. Sahling B G. Sarthou B S. Petersen C F. Smith D C. Wilson E |
author_sort |
G. P. Klinkhammer A |
title |
Discovery of new hydrothermal vent sites in Brans¢eld Strait, Antarctica |
title_short |
Discovery of new hydrothermal vent sites in Brans¢eld Strait, Antarctica |
title_full |
Discovery of new hydrothermal vent sites in Brans¢eld Strait, Antarctica |
title_fullStr |
Discovery of new hydrothermal vent sites in Brans¢eld Strait, Antarctica |
title_full_unstemmed |
Discovery of new hydrothermal vent sites in Brans¢eld Strait, Antarctica |
title_sort |
discovery of new hydrothermal vent sites in brans¢eld strait, antarctica |
publishDate |
2001 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.517.2476 http://www.science.oregonstate.edu/~kellerr/Klinkhammeretal01BSvents.pdf |
long_lat |
ENVELOPE(178.000,178.000,-72.300,-72.300) ENVELOPE(-143.667,-143.667,51.500,51.500) ENVELOPE(-68.470,-68.470,-71.441,-71.441) |
geographic |
Bransfield Strait Central Basin Hook Ridge Three Sisters |
geographic_facet |
Bransfield Strait Central Basin Hook Ridge Three Sisters |
genre |
Antarc* Antarctica Bransfield Strait |
genre_facet |
Antarc* Antarctica Bransfield Strait |
op_source |
http://www.science.oregonstate.edu/~kellerr/Klinkhammeretal01BSvents.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.517.2476 http://www.science.oregonstate.edu/~kellerr/Klinkhammeretal01BSvents.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766264177564844032 |