Abstract. Estimations of the reproducibility U–Pb ages from SHRIMP (Sensitive High-Resolution Ion MicroProbe) instruments are based on data studies that nearly 2 decades old. Since time, refinement analytical procedures and operational improvements have reduced historically identified uncertainties analysis. This paper investigates 36 thermal ionisation mass spectrometry (TIMS) double-dated “re...

The natural chemical and physical variations that occur within volcanic rocks (petrology) provide critical insights into mantle crust conditions on terrestrial bodies. Visible/near-infrared (VNIR; 0.3–2.5 ?m) thermal infrared (TIR; 5–50 spectroscopy are the main tools available to remotely characterize these materials from satellites in orbit. However, accuracy of petrologic information can be ...

Long-term instrumental monitoring of open-vent volcanoes provides the necessary datasets to characterize volcanic activity and unravel its temporal changes. This is particularly important for active lava domes, which can undergo rapid transitions in behavior over course their eruption. Here, we analyzed seismic, acoustic infrasound thermographic data collected between January 2018 September 202...

First posted February 19, 2021 For additional information, contact: Director, Geology, Geophysics, and Geochemistry Science CenterU.S. Geological SurveyBox 25046, MS-973Denver, CO 80225-0046 The igneous geology of the St. Francois Mountains terrane in southeast Missouri is dominated by products 1.48 to 1.45 billion year old volcanic plutonic magmatism but also includes volumetrically minor, com...

The thorough interpretation of the South Atlantic long offset seismic lines provides a new view magmatic and crustal architecture evolution conjugate volcanic passive margins (VPM) along austral segment Ocean. In this study, we make synthesis previously published unpublished profiles that are reinterpreted consistently, and, for first time, displayed in view. seaward dipping reflector sequences...

In the Central Andes, large (> 500 km2) and long-lived (1–5 Ma) volcanic clusters (LVCs) are less explored their eruptive history magmatic regimes understood than smaller, short-lived (<0.5 Ma), individual stratocones. The Chachani-large cluster (C-LVC) sizeable volume (c. 290 km3) consists of twelve edifices forming 1.06–0.64 Ma group stratovolcanoes 0.46–0.05 domes coulees block-lava flow fie...

Ciomadul is the youngest volcano in eastern-central Europe. Although its last eruption occurred at ca. 30 ka, there are independent indications for a high-crystallinity magma reservoir persisting beneath until present. In order to further test hypothesis of long-lived melt presence and better constrain nature timescales associated with subvolcanic storage system, over 500 zircon U-Th U-Pb spot ...

Abstract The microstructure and mineralogy of volcanic rocks is varied complex, their mechanical behaviour similarly complex. This review summarises recent developments in our understanding the failure modes rocks. Compiled data show that, although porosity exerts a first-order influence on uniaxial compressive strength rocks, parameters such as partitioning void space (pores microcracks), pore...

Abstract Zircon occasionally crystallizes in evolved melt pockets mafic large igneous province (LIP) magmas, and these cases, it is used to provide high-precision age constraints on LIP events. The precision accuracy of ages from LIPs are crucially important, because they may be implicated mass extinctions. However, why zircon magmas not clearly understood, since their compositions should limit...