357,571 Works

Annotated record of the detailed examination of a Mn components of Core 16 recovered during R/V Eltanin Cruise 36, supplement to: Margolis, Stanley V; Glasby, Geoffrey P (1973): Micro-laminations in marine manganese nodules as revealed by scanning electron microscopy. In: Phase I Report - Inter-University Program of Research on Ferromanganese Deposits of the Ocean Floor. Seabed Assessment Program, IDOE, NSF, Washington D.C., USA, pdf 500 kB, 77-83

Stanley V Margolis & Geoffrey P Glasby
Manganese nodules and micronodules from a series of deep-sea and shelf environments displaying a range of morphological features were selected for detailed examination by scanning electron microscopy (SEM). A summary of the morphological and petrographic characteristics of these nodules are presented. They are representative of areas in the Philippine Sea, the Tasman Sea and the Indian-Antarctic Ridge.

Annotated record of the detailed examination of a Mn deposits from the Carnegie Ridge in the Pacific Ocean, supplement to: Malfait, Bruce Terry (1975): The Carnegie Ridge near 86? W. : structure, sedimentation and near bottom observations. Ph. D. Dissertation), Oregon State University, USA, 142 pp

Bruce Terry Malfait
The Carnegie Ridge is a linear, aseismic, submarine ridge lying between the Galapagos Islands and the coast of South America. Surface ship, near bottom, and grain size studies from the saddle have been used to delineate the present geological environment and history of the ridge. Structurally the Carnegie Ridge is rather simple in profile, being bounded by east-west trending scarps which give the ridge a block-faulted appearance. Acoustic basement over the ridge appears smooth on...

Different gene flow determination in ciliate microcosms experiments, supplement to: Jacob, Staffan; Legrand, Delphine; Chaine, Alexis S; Bonte, Dries; Schtickzelle, Nicolas; Huet, Michèle; Clobert, Jean (in press): Gene flow favours local adaptation under habitat choice in ciliate microcosms. Nature Ecology & Evolution

Staffan Jacob, Delphine Legrand, Alexis S Chaine, Dries Bonte, Nicolas Schtickzelle, Michèle Huet & Jean Clobert
Local adaptation is assumed to occur under limited gene flow. However, habitat-matching theory predicts dispersal should favour rather than hinder local adaptation when individuals selectively disperse towards habitats maximizing their performance. We provide experimental evidence that local adaptation to the upper margin of a species' thermal niche is favoured by dispersal with habitat choice, while hindered under random dispersal. Our study challenges the idea that high gene flow precludes local adaptation, and provides unique experimental...

Photographs of tiles installed at Huinay Jetty, Comau Fjord, Chile, at 2016-09-07

Jürgen Laudien, Verena Häussermann & Günter Försterra

Photographs of tiles installed at Huinay Jetty, Comau Fjord, Chile, at 2014-08-26

Jürgen Laudien, Verena Häussermann & Günter Försterra

Photographs of tiles installed at Huinay Jetty, Comau Fjord, Chile, at 2014-08-15

Jürgen Laudien, Verena Häussermann & Günter Försterra

Photographs of tiles installed at Huinay Jetty, Comau Fjord, Chile, at 2014-02-19

Jürgen Laudien, Verena Häussermann & Günter Försterra

Basic and other measurements of radiation at Concordia Station (2015-02)

Angelo Lupi

Basic and other measurements of radiation at Concordia Station (2015-03)

Angelo Lupi

Semi-quantitive microplankton analysis (Sylt Roads Time Series) in the Wadden Sea off List, Sylt, North Sea in 2016

Johannes J Rick, Malte Elbrächter, Alfonso López & Karen Helen Wiltshire

Semi-quantitive microplankton analysis (Sylt Roads Time Series) in the Wadden Sea off List, Sylt, North Sea in 2015

Johannes J Rick, Malte Elbrächter, Alfonso López & Karen Helen Wiltshire

Semi-quantitive microplankton analysis (Sylt Roads Time Series) in the Wadden Sea off List, Sylt, North Sea in 2014

Johannes J Rick, Hannelore Halliger, Malte Elbrächter & Karen Helen Wiltshire

Basic and other measurements of radiation at Concordia Station (2015-01)

Angelo Lupi

Linking catchment hydrology and ocean circulation in Late Holocene southernmost Africa, supplement to: Hahn, Annette; Schefuß, Enno; Andó, Sergio; Cawthra, Hayley; Frenzel, Peter; Kugel, Martin; Meschner, Stephanie; Mollenhauer, Gesine; Zabel, Matthias (2017): Southern Hemisphere anticyclonic circulation drives oceanic and climatic conditions in late Holocene southernmost Africa. Climate of the Past, 13, 649-665

Annette Hahn, Enno Schefuß, Sergio Andó, Hayley Cawthra, Peter Frenzel, Martin Kugel, Stephanie Meschner, Gesine Mollenhauer & Matthias Zabel
Due to the high sensitivity of southern Africa to climate change, a reliable understanding of its hydrological system is crucial. Recent studies of the regional climatic system have revealed a highly complex interplay of forcing factors on precipitation regimes. This includes the influence of the tropical easterlies, the strength of the southern hemispheric westerlies as well as sea surface temperatures along the coast of the subcontinent. However, very few marine records have been available in...

Annotated record of the detailed examination of an Mn deposit surveyed in the North Atlantic Ocean (R/V Robert Conrad, Cruise 15), supplement to: Amos, A F; Garside, Christopher; Gerard, Robert D; Levitus, Sydney; Malone, T C; Paul, Allen Z; Roels, Oswald A (1973): Study of the impact of manganese nodule mining on the seabed and water column. In: Phase I Report - Inter-University Program of Research on Ferromanganese Deposits of the Ocean Floor. Seabed Assessment Program, International Decade of Ocean Exploration, National Science Foundation, Washington D.C., USA, 221-264

A F Amos, Christopher Garside, Robert D Gerard, Sydney Levitus, T C Malone, Allen Z Paul & Oswald A Roels
he proposed mining of ferromanganese deposits from the deep sea will affect benthic and pelagic environments depending to a great extent on the method of nodule retrieval and separation. Three basic deep-ocean mining systems have been proposed, each of which will effect the removal under varying conditions of water, sediment and nodules from the ocean floor. This report summarizes existing oceanographhic information on potential manganese nodule mining areas at the date of publication and presents...

Annotated record of the detailed examination of Mn deposits in the Atlantic Ocean, supplement to: Ericson, David B; Wollin, Goesta (1973): Precipitation of manganese oxide in deep-sea sediments. In: Phase I Report - Inter-University Program of Research on Ferromanganese Deposits of the Ocean Floor. Seabed Assessment Program, IDOE, NSF, Washington D.C., USA, 99-103

David B Ericson & Goesta Wollin
In addition to the large nodules of manganese dioxide that pave some regions of the ocean floor, much finely divided (<1 mm) manganese dioxide occurs within the sediment column. The fine material is a good deal more widely distributed than the large nodules, but because of the almost microscopic size of the finely divided manganese oxide, it is easily overlooked. However, the micronodules and specks of manganese oxide on the tests of forarainifera are conspicuous...

Determination of stable noble gases from the Antrim Shale in the Michigan Basin, supplement to: Wen, Tao; Castro, Clara M; Ellis, Brian R; Hall, Chris M; Lohmann, Kyger C (2015): Assessing compositional variability and migration of natural gas in the Antrim Shale in the Michigan Basin using noble gas geochemistry. Chemical Geology, 417, 356-370

Tao Wen, Clara M Castro, Brian R Ellis, Chris M Hall & Kyger C Lohmann
This study uses stable noble gases' (He, Ne, Ar, Kr, Xe) volume fractions and isotopic ratios from Antrim Shale natural gas to assess compositional variability and vertical fluid migration within this reservoir, in addition to distinguishing between the presence of thermogenic versus biogenic methane. R/Ra values, where R is the measured 3He/4He ratio and Ra is the atmospheric value of 1.384 ± 0.013 × 10**- 6, vary from 0.01 to 0.34 suggesting a largely dominant...

(Table 4) Mineralogical composition of heavy minerals in silt and sand fraction (15-500 µm) of marine sediments from sediment core GeoB18308-1 and Gouritz River catchment

Annette Hahn, Enno Schefuß, Sergio Andó, Hayley Cawthra, Peter Frenzel, Martin Kugel, Stephanie Meschner, Gesine Mollenhauer & Matthias Zabel

(Table 3) Geochemical downcore analyses of sediment core GeoB18308-1

Annette Hahn, Enno Schefuß, Sergio Andó, Hayley Cawthra, Peter Frenzel, Martin Kugel, Stephanie Meschner, Gesine Mollenhauer & Matthias Zabel

(Table 2) n-Alkane isotopic composition and distribution descriptive parameters averaged

Annette Hahn, Enno Schefuß, Sergio Andó, Hayley Cawthra, Peter Frenzel, Martin Kugel, Stephanie Meschner, Gesine Mollenhauer & Matthias Zabel

(Table 1) AMS radiocarbon analyses of bulk TOC and carbonate material from sediment core GeoB18308-1

Annette Hahn, Enno Schefuß, Sergio Andó, Hayley Cawthra, Peter Frenzel, Martin Kugel, Stephanie Meschner, Gesine Mollenhauer & Matthias Zabel

Fe/Ca ratios of sediment core GeoB18308-1

Annette Hahn, Enno Schefuß, Sergio Andó, Hayley Cawthra, Peter Frenzel, Martin Kugel, Stephanie Meschner, Gesine Mollenhauer & Matthias Zabel

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