It is well known that intraday returns tend to reverse the following period, conditional on excess buying pressure bid or ask side. This suggests liquidity providers “overreact” order imbalance (OIB) by initially altering quotes so much a negative autocorrelation seen in mid-price returns. We investigate under which circumstances this behavior most common. Specifically, it seems tick size augme...

The mantle beneath coastal SE China evolved from enriched to depleted between the Cretaceous and Neogene, although precise timing of this change remains unclear. Here, we focus on a newly discovered Eocene mafic volcanic neck that contains peridotite xenoliths in Fuding area Fujian Province, present new whole-rock Ar–Ar data which indicate flood basalts formed during (ages 38.5 ± 1.2 42.3 2 Ma)...

Abstract Most efforts to characterize the size and composition of mantle that complements continental crust have assumed mid‐ocean ridge basalt (MORB) source is incompatible‐element depleted residue extraction. The use Nd isotopes model this process led conclusion “depleted MORB reservoir” confined upper ∼30% mantle, leaving lower in a more “primitive” state. Here, we Nb/U Ta/U evaluate mass re...

Lithological heterogeneity is a widely accepted feature of the Earth’s mantle, with recycled crustal material accounting for significant part in ocean island basalt (OIB) geochemistry. Fe isotopes have been used to link geochemical OIB sources distinct mantle lithologies due their mineral-specific equilibrium fractionation effects, or composition, such as incorporation kinetically-fractionated ...

Halogens show a range from moderate (F) to highly (Cl, Br, I) volatile and incompatible behavior, which makes them excellent tracers for volatile transport processes in the Earth's mantle. Experimentally determined fluorine and chlorine partitioning data between mantle minerals and silicate melt enable us to estimate Mid Ocean Ridge Basalt (MORB) and Ocean Island Basalt (OIB) source region conc...

New H2O, CO2 and S concentration data for basaltic glasses from ‘hotspot’, with temperature differences of 200°C or more between hotter upwelling plumes and the ambient mantle Loihi seamount, Hawaii, allow us to model degassing, assimilation, adiabat (e.g. White & McKenzie, 1989; Campbell, 1998; and the distribution of major volatiles within and around the Davies, 1998). In contrast, it has lon...

به کمک شبیه ­سازی دینامیک مولکولی می ­توان تحلیل کوتاه مدت در مقیاس زمانی چند ده پیکوثانیه ­ای را برای مواد آسیب دیده­ی تابشی مورد مطالعه قرار داد. بر همین مبنا این ­سازی، تعداد تعادلی عیوب نقطه بین ­نشین و تهی ­جای مختصات مکانی آن­ها آهن- آلفا دست آورده شد. سپس با استفاده از نتایج حاصل شده، مونت کارلوی جنبشی شیء منظور بررسی تأثیر بازپخت آلفای انجام نشان دادند که یکنواخت دیده­ ی تنها خوشه جای ب...