Showing papers in "Earth and Planetary Science Letters in 1996"

TL;DR: In this paper, the influence of water on the dynamics of the oceanic upper mantle is re-evaluated based on recent experimental constraints on the solubility of water in mantle minerals and earlier experimental studies of olivine rheology.

TL;DR: The age of the collision of India with Asia is poorly constrained as mentioned in this paper, with the literature replete with estimates that range from the Late Cretaceous (> 65 Ma) to the latest Eocene (late Eocene).

TL;DR: In this article, the authors present sedimentary Re and Mo data from box-and multi-cores spanning a range of redox conditions, from well-oxygenated sites to locations with substantial sulfide concentrations.

TL;DR: A major discrepancy between the Late Quaternary sea level changes derived from raised coral reef terraces at the Huon Peninsula in Papua New Guinea and from oxygen isotopes in deep sea cores is resolved in this paper.

TL;DR: In this paper, positive Gd anomalies in shale-normalised rare earth element (REESN) patterns of natural waters may provide information on the types of ligands which control surface complexation of REE on particle surfaces.

TL;DR: The best fit of linear regression is very similar to the equation calculated from the phosphate and carbonate palaeotemperature equations as mentioned in this paper, and it is possible to use these measurements for monitoring fossil bone and tooth diagenetic alteration.

TL;DR: In this article, a total of 145 inclusions, trapped and isolated in Mg-rich olivine phenocrysts (Fo0.87-0.94) from basalts and ultramafic lavas, and representing the most primitive mantle melts known, have been analysed by ion microprobe for their H2O contents.

TL;DR: In this paper, a Tarim to Indus traverse provides insight into the tectonics of western Tibet, where strike-slip motion along the Karakorum and Altyn Tagh faults has been coeval with overthrusting in the Himalayas and Kunlun.

TL;DR: In this paper, the authors evaluated factors that influence the concentration of radon in the water column (i.e., productiondecay, horizontal transport, and loss across the pycnocline) using a linked benthic exchange-horizontal transport model.

TL;DR: In this paper, a two-dimensional numerical convection model was used to study the influence of trench migration on the ability of subducted slabs to penetrate an endothermic phase boundary at 660 km depth.

TL;DR: In this paper, the authors present data on clay mineralogy, major element, stable and radiogenic isotope abundances from Lower Miocene-Pleistocene sediments from ODP Leg 116 Nd and Sr isotope data show that the Himalayan provenance for the eroded material has varied little since > 17 Ma.

TL;DR: U Pb isotope systematics of shock metamorphosed zircon grains from pseudotachylitic breccias and Granophyre from the controversial Vredefort Structure, South Africa, provide new and compelling evidence for an impact origin for this structure as mentioned in this paper.

TL;DR: This article showed that, while North Atlantic Deep Water variability manifests itself clearly in Southern Ocean nutrient proxy records over periods as short as 500 yr, this deep water variability did not promote a direct link between climate variability in the high latitudes of the two hemispheres on millennial timescales.

TL;DR: In this article, a single set of experiments was conducted to investigate the relative mobilities of many subduction zone volatiles and trace elements in hydrothermal fluids, and the experimental results demonstrate that the composition of slab-derived fluids has great implications for the recycling of elements; not only in arc magmas but also in mantle plumes.

TL;DR: In this article, a physical model of continental subduction is presented, which reveals two principal regimes: a highly compressional (HC) regime and a low compressional regime characterised by high and low pressure between the overriding and subducting plates, respectively.

TL;DR: In this paper, the authors compare sea-level change in the Persian Gulf since the time of the last maximum glaciation at about 18 000 yr BP with observations of sea level change and palaeoshoreline reconstructions of the Gulf.

TL;DR: In this paper, the authors present 3D finite element models of the regional geoid of the Western Pacific subduction zones and define buoyancy and viscosities using the distribution of seismicity.

TL;DR: In this paper, the authors measured element partition coefficients in foraminiferal calcium carbonate relative to sea water (D) and showed that the difference between waters shallower and deeper than ∼ 2500 m is due to dissolution or a calcification response to a lower carbonate saturation state.

TL;DR: A peat core from a Swiss bog reveals significant enrichments of As, Sb and Pb extending back to Roman times, indicating that anthropogenic fluxes of these metals have exceeded the natural fluxes for more than 2000 years.

TL;DR: In this paper, four-layer models were constructed with sand and silicone putty, respectively, to represent the brittle and ductile layers of both crust and mantle, and the experimental results were used to propose a general model of passive margin formation leading to mantle exhumation.

TL;DR: In this article, the authors used 40Ar39Ar step-heating studies of whole-rock (WR) samples to date basaltic continental flood volcanism (CFV) in northwestern and southwestern Yemen.

TL;DR: The Ponta Grossa Dike Swarm (PGDS) as mentioned in this paper is the failed arm of a rift-rift-rift triple junction, related to the separation of South America and Africa.

TL;DR: In this paper, it was shown that the modally graded bedding, which is an important feature of the lower layered gabbros, may have similarly originated as sills.

TL;DR: U Pb dating of zircon and baddeleyite extracted from orthopyroxene megacrysts yield emplacement ages of 929 ± 2, 932 ± 3, and 9 32 ± 3 Ma for the Egersund-Ogna, Helleren, andAna-Sira massif-type anorthosites, respectively as discussed by the authors.

TL;DR: New ages from both surface and borehole samples confirm a 10-12 million year duration of magmatism, which post-dates the Tithonian mass extinction, and provide a unique 3-dimensional picture of the spatial and temporal eruption of the lava pile as discussed by the authors.

TL;DR: In this article, a suite of lavas which span the length of the Lesser Antilles island arc are presented from high precision TIMS230Th232Th isotope ratios, which imply channelled flow through the mantle wedge.

TL;DR: In this article, the accuracy and resolution of dating (mostly deduced from isotopic stratigraphy) were identified as significant factors of distortion; they found also that different time scales have been used by authors.

TL;DR: In this article, the Matuyama-Brunhes boundary (MBB) has been reasonably well constrained within the astronomically forced stratigraphic framework using oxygen isotopes by correlation of the δ18O data to a timescale based on astronomical forcing, they estimate astronomical ages for each of the MBB horizons.

TL;DR: In this article, the first measurements of carbonate melt viscosity and density at mantle pressures and temperatures were presented, which provided important data for modelling carbonatite behaviour within the mantle.

TL;DR: In this article, a new technique for interpretation of 3D seismic tomographic models in terms of temperature, degree of partial melt and rock composition is presented and tested, considering both anharmonic and anelastic temperature effects on seismic velocities as well as the effects of mineral reactions, composition and partial melt.