Showing papers in "Earth and Planetary Science Letters in 2006"

TL;DR: In this article, geochemical data for Pleistocene magmatic rocks from the Surigao peninsula, eastern Mindanao, the Philippines, demonstrate typical adakitic traits, including elevation of Sr/Y and depletion of the heavy rare earth elements.

TL;DR: Uranium-lead ages obtained by LA-ICP-MS analyses of zircon cores from a high-grade Armorican metasediment from the Mid-German Crystalline Rise, Central Germany, yield results which are identical to, but more precise than those previously obtained by SHRIMP dating.

TL;DR: In this paper, the effect of radiation damage on apatite diffusion has been investigated and shown to be positively correlated with the radiogenic 4He concentration in each sample, which is a proxy for a sample's natural exposure to actinide radioactivity below the closure temperature.

TL;DR: In this paper, the authors report in situ U-Pb ages and Hf isotopic data on detrital zircons from Paleozoic to Late Mesozoic strata in the Xishan area near Beijing that provide important constraints on the evolution and paleogeography of the northern part of the North China Craton.

TL;DR: In this article, a shears-shaped lithospheric delamination mechanism is proposed to construe the geodynamic scenario of northeastern Asia during Late Mesozoic: the collision between north China and Siberia around ∼Â160 ǫ Ma obstructed the westwards movement of the lithosphere induced by the subduction of Pacific plate, this tremendous stress caused the thickened lithosphere delaminating from west edge of the northeast China-Mongolia block at ∼Â 160 ǔ Ma and extended gradually eastwards, resulting volcanism migration from west to east in northeastern

TL;DR: In this paper, the melting behavior of a primitive undepleted peridotite composition has been determined over a pressure range of 1.2-3.2 -GPa at H2O saturated conditions.

TL;DR: In this paper, the authors combine thermal models of the Pacific lithosphere and pressure and temperature estimates from mantle nodules brought up by kimberlites with three dimensional models of Vs from surface wave tomography to obtain an empirical relation for Vs(P,T), where P is the pressure.

TL;DR: In this paper, the authors present the results of an experimental study of the partitioning of water between common upper mantle minerals (olivine, orthopyroxene, clinopyroxenes, garnet) and silicate melt, consisting of 352 measurements in 23 hydrous melting experiments.

TL;DR: G Gonfiantini et al. as discussed by the authors found that the oxygen isotopic compositions of carbonates deposited in the northern Altiplano demonstrate a rapid change in late Miocene time, which they attribute to an increase in elevation.

TL;DR: In this article, a new compilation of seismic data from the marginal seas of Asia now shows that only the Red River reached its historic peak after 4 Ma, and that sediment flux from Asia first peaked in the early-middle Miocene (24-11 Ma), well before the initiation of a glacial climate, indicating that rock uplift and especially precipitation are the key controls on erosion.

TL;DR: Granitic intrusions emplaced within Laurentia during the Grenville Orogeny (1.15-1.05 Ga) are exceptionally Zr-rich, primarily a function of high modal zircon, relative to Paleozoic granitoids emplaced in eastern Laurentia as mentioned in this paper during phases of Appalachian orogenesis.

TL;DR: In this article, the boron isotope equilibrium constant (11 − 10 K B ) was determined empirically from the difference in the dissociation constants of 11 − 10 B(OH) 3 and 10 − 3 in pure water, 0.6 − 1 H 2 O KCl and artificial seawater.

TL;DR: In this article, the authors discuss the possibility that the North Anatolian fault (NAF) results from the deep deformation of the slab beneath the Bitlis-Hellenic subduction zone.

TL;DR: In this article, a series of experiments were described where dyed water (a magma analogue) was intruded into solid gelatine (a crustal analogue) to investigate the formation of sills.

TL;DR: Fission-track data from apatite in Early Cretaceous sedimentary strata exposed on the hanging-wall of Liupan Shan thrust fault in northeastern Tibet suggest that a late Cenozoic rapid cooling events occurred at 7.3-8.2-Ma or ~8.8-Ma as discussed by the authors.

TL;DR: In this article, four populations of zircons are recognized by U-Pb analyses of the Neoproterozoic Liantuo Formation in the northern part of the Yangtze Block, South China.

TL;DR: In this article, the authors present a continuous temperature record based on high resolution δ15N measurements and firn model studies, which covers a sequence of 9 Dansgaard-Oeschger (DO) events (9−17) during the time period from 38 to 64 kyr BP for which temperature changes of 8 to 15 °C were estimated.

TL;DR: In this article, microstructural analyses of peridotite mylonites from the oceanic lithosphere indicate that shear localization results from the combined effects of grain size reduction, grain boundary sliding and second phase pinning during deformation.

TL;DR: In this article, the isotopic composition of organic compounds synthesized by abiotic processes under hydrothermal conditions was evaluated and it was shown that carbon isotopic compositions may not be a particularly effective diagnostic means to differentiate between biologic and non-biologic sources.

TL;DR: Ono et al. as discussed by the authors used a combination of advanced ab initio simulation techniques and high-pressure experiment to determine the crystal structure of CaCO 3 post-aragonite, which is believed to be a major carbon-containing mineral in the Earth's mantle.

TL;DR: In this paper, detrital zircons from the Wulashan khondalites in the Ordos Terrane, western block of the North China Craton, give U-Pb ages between 1.84 and 2.32 Ga, showing that their provenance was dominated by Paleoproterozoic rocks.

TL;DR: In this article, it was shown that the oxidation of at least 5000 Gt C of organic carbon is the most likely explanation for the observed geochemical and climatic changes during the PETM, for which there are several potential mechanisms.

TL;DR: The authors measured the magnesium isotope ratios in 45 rivers including 16 of the largest rivers in the world, covering a range of geologic, tectonic and climatic drainage basin environments.

TL;DR: The Transgondwanan Supermountain this paper was formed by a collision between East and West Gondwana during the early Early Cambrian period (∼ 500 to 260myr).

TL;DR: In this article, it was shown that a significant portion of the methane from discharged methane bubbles can reach the upper water column, which may be explained due to the formation of hydrate skins.

TL;DR: In this paper, the authors reported the presence of clear annual cycles in trace-element (Mg/Ca, Sr/Ca and Ba/Ca), and stable isotope (δ18O and δ13C) composition in an annually banded stalagmite from Heshang Cave, Hubei Province, China (30.44°N, 110.42°E).

TL;DR: In this article, the authors analyzed the M_w 7.6 Kashmir earthquake of October 8, 2005, using sub-pixel correlation of ASTER images to measure ground deformation, and modeling seismic waveforms.

TL;DR: The Xuelongbao plutonic complex in the eastern margin of the Tibetan Plateau is dated at 748-±-7-Ma using the SHRIMP zircon U-Pb method and represents part of the Neoproterozoic igneous assemblage of South China as mentioned in this paper.

TL;DR: In this paper, the authors analyzed river water, rock, travertine and soil from the high altitude, negligible vegetation setting of the Southern Tibetan Plateau and demonstrated that Ca and Mg isotope ratios are fractionated during weathering.

TL;DR: In this paper, the authors examined the role that flood basalt eruptions may have played during times of mass extinction through the release of volcanic gases, and estimated the potential mass of CO 2 and SO 2 released during formation of the ∼65-Ma Deccan province.