Showing papers in "Earth and Planetary Science Letters in 2020"

TL;DR: In this article, the formation of porphyry copper deposits (PCDs) requires a complex sequence of intra-crustal magmatic processes, from the lower crust to the upper crust.

TL;DR: In this article, the authors investigate the relationship between Hg concentrations and their relationship to TOC, TS, and Al in four modern marine settings (Black Sea, Japan Sea, Saanich Inlet, and Peru Margin) and six ancient marine formations (from Lower Cambrian to Lower Jurassic).

TL;DR: In this article, a centimeter-resolution palynological, sedimentological, carbon stable isotope and paleobotanical investigations of strata spanning the end-Permian mass-extinction event at the Frazer Beach and Snapper Point localities, in the Sydney Basin, Australia was conducted.

TL;DR: In this article, the authors apply carbonate clumped isotope thermometry to well-dated carbonate paleosols and marls in the Gonjo Basin, SE Tibet, to reveal the topographic evolution of the basin.

TL;DR: In this article, a short-period magmatic event occurred during the latest stage of continental rifting and intruded the edge of the thinned continental crust, triggering crustal breakup and onset of steady-state seafloor spreading.

TL;DR: This paper applied the Climate-Leaf Analysis Multivariate Program (CLAMP) and moist enthalpy method to the newly discovered early Oligocene (30.8 Ma) fossil leaves from the Qaidam Basin, to reconstruct quantitatively the paleoclimate and paleoelevation of this critical part of northern Tibet.

TL;DR: In this paper, a high-resolution magnetostratigraphy of a ∼3.5 km thick sedimentary sequence in the syn-contractional Gonjo Basin, east-central Tibet is presented.

TL;DR: In this article, the authors analyzed the whole crustal architecture of the Cathaysia Block, South China, through a ∼300 km-long SINOPROBE deep seismic reflection profile.

TL;DR: The average abundance of S-type granites has been quantified using two methods: (i) comparing the cumulative distribution of P concentrations for selected time intervals, and (ii) using plots of molar P against rare earth elements (REE) plus Y.

TL;DR: In this article, the authors used high-resolution gamma ray logs to conduct a cyclostratigraphic analysis of the Shahejie Formation, which is a Paleogene succession in the Dongpu Depression characterized by sandstones and dark mudstones interbedded with thin salt rocks.

TL;DR: In this article, the authors assess the progressive mobility of the drainage divide in three lithologically and structurally distinct groups of bedrock in the High Atlas (NW Africa) and track both variations in rock strength and structural configuration which influence drainage mobility during erosion through an exhuming mountain belt.

TL;DR: In this paper, the authors show how turbidity currents evolve using the first detailed measurements from multiple locations along their pathway, which come from Monterey Canyon offshore California and show that initially-faster flows then achieve near-uniform velocities (autosuspension), whilst slower flows dissipate.

TL;DR: In this article, the authors investigated the Neoarchean Dengfeng Complex, a typical granite-greenstone belt in the southern part of the North China Craton (NCC), using petrography, geochronology, and phase equilibrium constraints on rocks from different lithostructural units.

TL;DR: In this paper, a suite of isotopic systems (i.e., δ 41 K, δ 7 Li, 87Sr/86Sr) and major/minor elements in bulk rock, veins and mineral separates from the upper volcanic section of Cretaceous (Troodos ophiolite) and Jurassic (Ocean Drilling Program Hole 801C) oceanic crust.

TL;DR: Li et al. as mentioned in this paper used low-Mg calcite shells of brachiopods (bLMCs) from a single stratigraphic section in central China to reconstruct paleotemperature changes from the middle to the latest Permian.

TL;DR: In this article, the authors used the most detailed luminescence dating age model for arid Central Asia (ACA) for three loess records in the Tianshan Mountains spanning the past 250 ka to show a sharp dichotomy in moisture variation between lowland and high mountain areas.

TL;DR: In this article, the authors show that sulfide-bearing cumulates represent the missing reservoir with both high Cu concentrations and high Cu/Ag ratios, complementary to the low Cu abundance in felsic arc magmas and the continental crust.

TL;DR: In this article, the spatial distribution of reappraised aftershocks and landslides, and provide new field evidence for its hitherto unknown surface rupture extent along the Mishmi and Abor Hills, were jointly analyzed.

TL;DR: In this article, detrital zircon U-Pb dating, bedrock (U-Th)/He thermochronometry, topographic analysis and numerical modeling were used to explore the paleo-drainage pattern of the Dadu and Anning Rivers, eastern Tibet.

TL;DR: In this article, the authors measured K isotopic compositions in two sets of bauxite developed on the Columbia River Basalts, together with fresh parental basalt and aeolian deposit samples using a recently developed high-precision method.

TL;DR: In this paper, the authors constrain the activity history of the Cona rift, the only north-trending rift currently recognized in the eastern Himalaya, based on biotite and K-feldspar 40Ar/39Ar and zircon and apatite (U-Th)/He thermochronology, to evaluate these proposed rifting mechanisms.

TL;DR: In this paper, the authors focus on five dredges from the Shaka and Prince Edward OTFs on the ultraslow spreading Southwest Indian Ridge that recovered significant volumes of deformed mantle rocks.

TL;DR: In this paper, the authors explore the evolution of global marine redox chemistry using U isotopes of marine limestones and find that marine anoxia expanded in the latest Devonian oceans to cover >5% of the continental shelf seafloor area.

TL;DR: In this paper, the authors demonstrate that the geochemical signature of the Georgetown TTG suite in the Georgetown Inlier, NE Australia, was derived from partial melting of spatially-associated mafic rocks in a post-collisional setting.

TL;DR: In this paper, the authors demonstrate that peel-back convergence can explain the thermobaric bimodality of late Archean rocks within an asymmetric tectono-thermal framework.

TL;DR: In this paper, the authors obtained the first combined O, Ti, and Cr isotope data for individual chondrules from enstatite, ordinary, and carbonaceous chondrites.

TL;DR: In this article, the generation and differentiation of continental crust by arc magmatism is strongly influenced by episodes of high magmatic flux (flare-ups) which encourage the development of deep crustal hot zones where magmatic differentiation and density stratification combine to form the upper felsic and lower mafic continental crust.

TL;DR: It is identified that the Ordovician Fezouata Shale has a clear taphonomic difference when compared to the Cambrian Burgess Shale and Chengjiang Biota, indicating that the classic Burgess shale was the acme for soft tissue preservation.

TL;DR: In this paper, the density and bulk sound velocity of liquid iron alloys, (Fe, Ni)X(H, Si, O, S, C)1-X, at Earth's outer core pressure and temperature conditions based on first-principles molecular dynamics simulations were examined.

TL;DR: In this paper, a new GPS velocity field is presented with new permanent station velocities in Albania, Bulgaria, Kosovo, Montenegro, and Northern Macedonia, providing insights into previously unresolved aspects on the large-scale dynamics of continental lithosphere and on the relation between long and short-term kinematics.