7,710 Works

GEOFON event gfz2010gtdx (Northern Sumatra, Indonesia)

Earthquake, 2010-04-06 22:15:02, Northern Sumatra, Indonesia

GEOFON event gfz2011axdw (Loyalty Islands)

Earthquake, 2011-01-13 16:16:42, Loyalty Islands

CH-ME-2-PLP corrected magnetic field in ECEF/NEC system

Hermann Luehr & Martin Rother
CHAMP, Magnetic and Electric Field

CHAMP Orbit Predictions - CPF

Markus Rothacher, Rolf Koenig, Krzystof Snopek & Roland Schmidt
This data set features the CHAMP orbit predictions in the CPF format.

GPS C/A Navigation Message Data Bits

Markus Rothacher & Georg Beyerle
GPS C/A navigation message data bits. The tar archive containsup to 32 files. Each file covers 24 hours of navigation messages.

Final GPS Earth Rotation Parameters

Markus Rothacher, Reinhard Dietrich, Peter Steigenberger, Mathias Fritsche & Axel Ruelke
Final GPS Earth Rotation Parameters (homogenesouly reprocessed with Bernese GPSSoftware by TU Munich and TU Dresden).

TerraSAR-X Predicted Orbit

Rolf Koenig, Markus Rothacher, Krzysztof Snopek & Daniel Koenig
This data set features a TerraSAR-X Orbit Prediction Product.

High temperature measurement of the saturation magnetisation for VER98-1-1

Francois Demory, Hedi Oberhänsli, Norbert Nowaczyk, Matthias Gottschalk, Richard Wirth & Rudolf Naumann
It shows a loss of a part of the signal at temperatures between 350 and 400 °C, typical disintegration temperatures for greigite. The remaining signal disappears above a temperature of 590 °C, typical for magnetite.

Downcore variations of total sulphur for VER98-1-14

Francois Demory, Hedi Oberhänsli, Norbert Nowaczyk, Matthias Gottschalk, Richard Wirth & Rudolf Naumann
Higher abundance of greigite during glacial intervals coincides with small increases of the S content (Fig. 11B). Greigite levels in glacial sediments cannot be correlated between cores (Fig. 12), which suggests that greigite concentrations are driven by local processes. We suggest that faecal pellets could be a suitable microenvironment for sulphate reduction. And while greigite could potentially act as proxy for faecal pellets in glacial sediments, unfortunately, we cannot rely on this possible indicator since...

Downcore variations of the SIRM/κLF for CON01-603-2, CON01-604-2, CON01-605-3, VER98-1-1, VER98

Francois Demory, Hedi Oberhänsli, Norbert Nowaczyk, Matthias Gottschalk, Richard Wirth & Rudolf Naumann
Greigite levels in glacial sediments cannot be correlated between cores (Fig. 12), which suggests that greigite concentrations are driven by local processes. We suggest that faecal pellets could be a suitable microenvironment for sulphate reduction. And while greigite could potentially act as proxy for faecal pellets in glacial sediments, unfortunately, we cannot rely on this possible indicator since the greigite is very sensitive to onshore alterations after sampling (Snowball and Thompson, 1990).

The relationship between concentrations of chl-a calculated from SeaWiFS OC2 and chl-a calculated determined from ground truth measurements during field expeditions in Lake Baikal during 2001 and 2002

Birgit Heim, Hedi Oberhänsli, Susanne Fietz & Hermann Kaufmann
Values of measured chlorophyll (HPLC=High Pressure Liquid Chromatography) are the mean concentrations of each sampling point from 5 to 30 m depth. For the OC2 chl-a calculations, the least clouded acquisitions in 2001 (2001/07/19) and 2002 (2002/07/20) were chosen. Note the considerable chl-a overestimation caused by the influences of terrigenous input in case 2 waters.

δ13C(organic), C/N mass ratios and %TOC for Continent Ridge core CON01-603-5

George Swann, Anson Mackay, Melanie Leng & Francois Demory
C/N mass ratios remain constant throughout MIS 3 and into MIS 2, with values between 6.3 and 8.9, indicating no significant terrestrial input of organic matter (Fig. 3). Low %TOC values during the interstadial increase from 0.4 to 0.7 between 57.8 and 43.7 kyr BP with a concurrent gradual increase in δ13C(organic) amid oscillations between −23.2‰ and −26.1‰ (Fig. 3). %TOC falls to 0.4 between 40.9 and 39.4 kyr BP whereas δ13C(organic) remains high at...

Trace element composition of concretions, ICP–MS measurements

Natalie Fagel, Laurent Alleman, L Granina, F Hatert, Edit Thamo-Boszo, R Cloots & Luc André
In order to get a complete geochemical signature, 14 P-rich concretions, chosen among the different cores, were acid digested (Table 3a and Table 3b). In a clean laboratory, 1.7 to 36 mg of concretions were digested overnight in a concentrated mixture of Suprapur acid (3 ml HCl/2 ml HNO3/1 ml HF) at 90 °C in sealed Teflon beakers. After evaporation to dryness, the residue was dissolved in 2.5 ml of 2% HNO3 Suprapur and diluted...

Selected electron-microprobe analyses of vivianite and santabarbaraite from Lake Baikal

Natalie Fagel, Laurent Alleman, L Granina, F Hatert, Edit Thamo-Boszo, R Cloots & Luc André
Electron-microprobe analyses (Table 5) were completed on a selection of grains from 11 samples, with a CAMECA SX-50 instrument (University of Louvain-la-Neuve, Belgium), under an accelerating voltage of 15 kV and a probe current of 20 nA. The standards used were the Kabira graftonite (Fe, Mn, P; Fransolet, 1975), corundum (Al), olivine (Mg), wollastonite (Si), and willemite (Zn).

Gas mass spectrometry of gas samples from the KTB Main Hole HB1

H Kamm, L Machon & S Donner
The main objective of this drilling fluid analysis was the detection of inflows of formation fluids. Therefore different gases dissolved in the drilling mud were measured continuously and automatically at drill site with three different methods (Fig.: KTB-Report 92-2 page C13). The operation principles of the mass spectrometer and the gaschromatograph have been explained by STROH et al. (1988) and FIGGEMEIER et al. (1991). The principle of radon determination is published by ERZINGER et al....

Diatom-inferred snow accumulation models for BAIK38 (BAIK94-38A) using uncorrected and corrected relative abundance data of five dominant phytoplankton species.

Anson Mackay, D. Ryves, Rick Battarbee, Roger Flower, David Jewson, Patrick Rioual & Michael Sturm
Diatom-inferred snow depth reconstructions for BAIK38 using uncorrected taxa (Fig. 5a–c) show similar trends throughout the study period, with all or only five taxa in the model; snow depth levels are marginally higher in zone 2 in comparison to zones 1 and 3. However, error values are large in comparison to the changes observed. The snow depth reconstruction using corrected diatom abundances (Fig. 5d) shows a somewhat different response. Low values characterise the period coincident...

SAFOD Main Hole downhole logging data phase 1.2 1556-1744m

SAFOD is motivated by the need to answer fundamental questions about the physical and chemical processes controlling faulting and earthquake generation within a major plate-bounding fault. SAFOD will drill and instrument an inclined borehole across the San Andreas Fault Zone to a depth of 3.2 km, targeting a repeating microearthquake source. The drill site is located west of the vertical San Andreas Fault on a segment of the fault that moves through a combination of...

Borehole Temperature of HSDP-2-A on 13./14. April 1999

Grit Dannowski, Jörg Schrötter, Kemal Erbas, Andrea Förster & Ernst Huenges
The temperature pattern is attributed to a superposition of thermal and hydraulic processes. In the deeper borehole (HSDP-2, depth 3.1 km) detailed temperature monitoring was performed. Temperature measurements reveal two different thermal regimes. The upper part is characterised by cold temperatures and a negative temperature gradient similar to those observed in the shallow pilot borehole. Below 1100 m, increasing temperatures are observed. Different processes, such as topographically driven groundwater flow, ingress of salt water and...

Downhole Resistivity log for HSDP-2-A (environmentally corrected)

Arno Buysch, Renate Pechnig, Jürgen Wohlenberg, Jochem Kück & Ulrich Harms
The GFZ Potsdam started a log interpretation study in cooperation with the Technical University of Aachen. As a first result, the logged profile allows for a subdivision of the lithological profile into at least two major zones: (1) a subaerial zone (1900-3600ft) and (2) a submarine zone (3600-6100ft). In addition, the geophysical measurements indicate a further subdivision into the Log Units 1-4 , each unit distinguished by different geophyshical log responses: (Fig.2) (Fig.4) The basaltic...

SAFOD Main Hole downhole logging data phase 1.2 1932-2041m

SAFOD is motivated by the need to answer fundamental questions about the physical and chemical processes controlling faulting and earthquake generation within a major plate-bounding fault. SAFOD will drill and instrument an inclined borehole across the San Andreas Fault Zone to a depth of 3.2 km, targeting a repeating microearthquake source. The drill site is located west of the vertical San Andreas Fault on a segment of the fault that moves through a combination of...

SAFOD Main Hole downhole logging data phase 1.1

SAFOD is motivated by the need to answer fundamental questions about the physical and chemical processes controlling faulting and earthquake generation within a major plate-bounding fault. SAFOD will drill and instrument an inclined borehole across the San Andreas Fault Zone to a depth of 3.2 km, targeting a repeating microearthquake source. The drill site is located west of the vertical San Andreas Fault on a segment of the fault that moves through a combination of...

Geochemistry and age model of sediment core BDP96-1 (BDP-2-A)

Jens Müller & Martin Melles
Within the framework of the Baikal Drilling Project (BDP), a 192 m long sediment core (BDP-96-1) was recovered from the Academician Ridge, a submerged topographic high between the North and Central Basins of Lake Baikal. Sedimentological, clay mineralogical and geochemical investigations were carried out on the core interval between 90 and 124 m depth, corresponding to ca. 2.4–3.4 Ma. The aim was to reconstruct the climatic and tectonic history of the continental region during the...

Related material to A sedimentary record of Holocene surface runoff events and earthquake activity from Lake Iseo (Southern Alps, Italy)

Stefan Lauterbach, Emmanuel Chapron, Achim Brauer, Matthias Hüls, Adrian Gilli, Fabien Arnaud, Andrea Piccin, Jérôme Nomade, Marc Desmet, Ulrich Von Grafenstein &

Near Eastern radiocarbon CONTEXT database

Daniel Schyle & Utz Böhner
The radiocarbon CONTEXT database is intended to offer help in analyzing archaeological radiocarbon dates ranging from the Upper Paleolithic to the beginning of the Chalcolithic period in the Near East (20.000 - 5.000 calBC). Maps for defined absolute time ranges render up to date information easily accessible to scholars as well as to non-specialists. In addition, site specific data, bibliographical references and complementary context information are supplied.

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