Trace metal distribution in Baltic Sea ferromanganese concretions: inferences on accretion rates     

Erwin Suess  Djafar Djafari 《Earth and Planetary Science Letters》1977,35(1):49-54

The usually high concentrations of Zn, Pb, Cd, and Cu in the most recently accreted portions of ferromanganese nodules from the western Baltic Sea are thought to reflect increased metal input due to anthropogenic mobilization. If so, the point of increase represents a time horizon within the structure of the nodule. Similar trace metal distributions of radiometrically dated sediments from the same area suggest that the ferromanganese nodules have grown in thickness between 0.02 and 0.16 mm yr^?1. From this growth rate anthropogenic Zn flux to the nodule surface was calculated to be 80 mg m^?2 yr^?1.  相似文献   

A remark on M. Heikkinen’s paper “On the Honkasalo term in tidal corrections to gravimetric observations”, B.G. 53, 3, 239–245     

Erwin Groten 《Journal of Geodesy》1980,54(2):221-222

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Ellipsoidal density models and hydrostatic equilibrium: Interim report     

A. Marussi  H. Moritz  R.H. Rapp  R.O. Vicente 《Physics of the Earth and Planetary Interiors》1974,9(1):4-6

From the point of view of consistency with the Geodetic Reference System 1967, it would be desirable that the boundary surface of a Standard Earth Model is an exact equipotential ellipsoid. This is incompatible with the requirement that it be a figure of hydrostatic equilibrium. The report investigates the relation between equipotential ellipsoids and equilibrium figures. The principal conclusion is that it is possible to find an ellipsoidal model that has the same distribution of density and flattening (more precisely, of the parameter f′ as defined in the paper) as a hydrostatic model, the deviations being only of second order in the flattening.  相似文献   

Die physikalische und chemische Erforschung der Donau     

Grozdana Petrović  Erwin Märki 《Aquatic Sciences - Research Across Boundaries》1971,33(1):269-286

Ohne Zusammenfassung  相似文献   

On the covariance function of the terrain correction     

Erwin Groten 《Studia Geophysica et Geodaetica》1970,14(2):264-269

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Some geochemical aspects of sedimentary rocks in proximity of coals, sydney coalfield (upper carboniferous), cape breton island, nova scotia, canada     

Erwin L. Zodrow 《International Journal of Coal Geology》1983,2(4):299-320

Channel samples of roof and seat rocks (lutites, siltstone)) of 10 successional coals, in addition to red mudstone and calcareous siltstones, have been collected from the Sydney Coalfield, Nova Scotia. The channel samples are confined to within 150 cm above the top of coals, and to within 20 cm below the bottom of coals. Whole-rock and trace-elemental analyses are reported: wt. % of oxides of Si, Al, total Fe, Ca, Mg, Na, K, T1, Mn; and ppm's for Cu, Ni, Pb, Zn, Cr, Co, Ga, V, As, U, and Th, respectively. Th/U ratios, organic carbon and carbonate carbon of selected roof rock samples are also reported.The comparatively small stratugraphic mean variations of Na₂/K₂O and Na₂O/Al₂O₃ are open to interpretation but may indicate either a common sedimentary source, or a similar diagenetic history during basin development. Assumed is that the oxide ratios originated from detrital feldspars and clays. The probability model for uranium is Pearson's Type VII curve. The relationship between uranium (thorium) and (assumed) organic calcite in selected calcareous siltstones is examined. Stratigraphic variation of the geochemistry is assumed to be cycle-controlled, excepting probably As, V, and Cu,which under the stated conditions are amenable to mathematical modeling (of sedimentary cycles).  相似文献   

Imaging and regional distribution of basalt flows in the Faeroe-Shetland Basin   总被引：1，自引：1，他引：0  

Robert S. White  John R. Smallwood  Moritz M. Fliedner †  Brian Boslaugh  Jenny Maresh  Juergen Fruehn ‡ 《Geophysical Prospecting》2003,51(3):215-231

We demonstrate that the use of long-offset seismic data allows wide-angle reflections and diving waves to be recorded, and that these can be used in conjunction with prestack depth migrations to constrain and to image the base of the basalt flows and the underlying structure in the Faeroe-Shetland Basin. Crustal velocity models are built first by inverting the traveltimes of the recorded reflections and diving waves using ray-tracing methods. Finer details of the velocity structure can then be refined by analysis of the amplitudes and waveforms of the arrivals. We show that prestack depth migration of selected wide-angle arrivals of known origin, such as the base-basalt reflection, using the crustal velocity model, allows us to build a composite image of the structure down to the pre-rift basement. This has the advantage that the wide-angle first-arriving energy must be primary, and not from one of the many multiples or mode-converted phases that plague near-offset seismic data. This allows us to ‘tag’ these primary arrivals with confidence and then to identify the same arrivals on higher-resolution prestack migrations that include data from all offsets. Examples are drawn from the Faeroe-Shetland Basin, with a series of regional maps of the entire area showing the basalt depths and the thickness of the basalt flows and underlying sediment down to the top of the pre-rift basement. The maps show how the basalts thin to the southeast away from their presumed source west of the present Faeroe Islands, and also show the extent to which the structure of the pre-rift basement controls the considerable variations in sediment thickness between the basement and the cap formed by the overlying basalt flows.  相似文献   

Authigenic gypsum found in gas hydrate-associated sediments from Hydrate Ridge, the eastern North Pacific   总被引：4，自引：0，他引：4  

Erwin Suess  Dirk Rickert 《中国科学D辑(英文版)》2004,47(3)

Hydrate Ridge is located at the second accretion-ary ridge along the Cascadia margin of Oregon in the eastern North Pacific (fig. 1). The Bottom Simulating Reflector (BSR) underlies the entire Hydrate Ridge[1]. The Ocean Drilling Program (ODP) in 1992 at Site 892 and the TECFLUX99 and 2000 showed that the gas hydrate occurs just beneath the thin sediment- covered surface and at the horizon of around 64 meter below seafloor (mbsf) on Hydrate Ridge[25]. The col-lision of the Juan de …  相似文献   

3-2: The Chelopech high-sulphidation epithermal Cu–Au deposit: Ore deposit: Lat. 42°41′ N, Long. 24°05′ E     

Robert Moritz  Isabelle Chambefort  Silvina Georgieva  Stphane Jacquat  Rumen Petrunov 《Ore Geology Reviews》2005,27(1-4):130

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Earthquake scaling: the effect of a viscoelastic asthenosphere     

Moritz Heimpel 《Geophysical Journal International》2006,166(1):170-178

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