Hydrothermal activity at Hook Ridge in the Central Bransfield Basin, Antarctica

被引：32

作者：

Bohrmann, G

Chin, C

Petersen, S

Sahling, H

Schwarz-Schampera, U

Greinert, J

Lammers, S

Rehder, G

Daehlmann, A

Wallmann, K

Dijkstra, S

Schenke, HW

机构：

[1] GEOMAR Res Ctr Marine Geosci, D-24148 Kiel, Germany

[2] Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA

[3] TU Bergakad Freiberg, D-09596 Freiberg, Germany

[4] Alfred Wegener Inst Polar & Meeresforsch, D-27568 Bremerhaven, Germany

来源：

GEO-MARINE LETTERS | 1999年 / 18卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1007/s003670050080

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Hydrothermal activity in the Central Bransfield Basin revealed an active low-temperature vent field on top of a submarine volcanic structure. A temperature anomaly was detected and the sea floor showed various patches of white silica (opal-A) precipitate exposures and some yellow-brown Fe-oxyhydroxide crusts. Enriched dissolved methane concentrations were encountered. Sediment was near 24 degrees C just after the grab came on deck. No dense population of chemosynthetically based macrofauna known from other hydrothermal venting areas was present, except for pogonophora. The observations suggest that the sedimented hydrothermal field at Hook Ridge is a low-temperature end-member branch from a deeper hydrothermal source.

引用

页码：277 / 284

页数：8

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