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Articles by Andreas Pack
Triple Oxygen Isotope Compositions of Isotopic Reference Waters: Implications for VSMOW-Scale and VSMOW–SLAP-Scale Δ ′ 17 O Calibration
Filename Description ggr70058-sup-0001-TableS1.pdfPDF document, 252.7 KB Table S1. Compiled triple oxygen isotope data for isotope reference materials (iRMs). This material is available from: http://onlinelibrary.wiley.com/doi/10.1111/ggr.70058/abstract (This link will take you to the article abstract).
Fossil wood cells recorded 300 million years of Europe’s tectonic history
Abstract Woody debris undergoes the same processes of deposition and diagenesis as its embedding sediments, making its fossilized products potentially good archives of basin evolution. We review this hypothesis by reconstructing the timelines, source and physicochemical conditions of mineralization in silicified Pennsylvanian wood from the Kyffhäuser, central Germany.
Formation of iron oxide-apatite deposits triggered by magmatic assimilation of evaporitic sulfate
Abstract The geological origins of iron oxide-apatite (IOA) rocks, important resources for iron and rare-earth elements, are intensely debated. Using triple oxygen isotope data, we here show that magnetite from IOA deposits near Kiruna, northern Sweden, and related igneous rocks contain high concentrations of oxygen derived from evaporitic sulfate. To explain these observations, we propose that the Kiruna IOA assemblage formed in response to massive assimilation of evaporites by silicate magmas.
A Unified Method for Triple Oxygen Isotope Analysis of Sulfate, Water, and Organics
Yield of the Oxygen Extraction High-temperature TC/EA reduction oxygen extraction yields obtained by the TORCH method were generally at or above stoichiometric expectations across all solid standards. Absolute TC/EA yields for water are not provided due to uncertainties in water volume determination, which result from variability in capsule mass and geometry relative to the water mass.
Six Ca‐Mg‐Fe Carbonate Reference Materials for In Situ Measurement of Oxygen and Carbon Isotope Ratios
Sixty-four percent of the land above sea level is covered by sediments, a third of which are carbonates (Hartmann and Moosdorf 2012) consisting predominantly of calcite, aragonite and minerals of the dolomite-ankerite solid-solution series. Carbonates can provide a key archive about the evolution of both marine and terrestrial environments over the course of the last ~ 3.8 billion years (Śliwiński et al. 2016a, and references therein).
Water on the Moon and Mars
Water on the Moon and Mars The Special Feature "Water on the Moon and Mars" explores the critical role of water on the Moon and Mars for human exploration, with a focus on NASA's Artemis program, which aims to return humans to the Moon. The collection highlights water's significance for sustainability in future lunar and Martian habitats, addressing scientific aspects such as water origins, mining, and its physical and chemical properties in extreme environments.
The catastrophic break‐up of the ureilite parent body: Modeling constraints on the debris size
INTRODUCTION Ureilites are achondrites consisting of mafic silicates (olivines, pyroxenes) and minor interstitial material that is metal- and carbon-rich. The entire range of forsterite (Mg2SiO4) contents observed in the olivine cores is Fo74 to Fo97 among all ureilites, but there is a clear peak at the low end of the distribution with many samples clustering at Fo79-81 (Goodrich et al., 2015; Mittlefehldt et al., 1998, see also Downes et al., 2008).
A CO2 greenhouse efficiently warmed the early Earth and decreased seawater 18O/16O before the onset of plate tectonics
A CO2 greenhouse efficiently warmed the early Earth and decreased seawater 18O/16O before the onset of plate tectonics By Daniel Herwartz, Andreas Pack, and Thorsten J. Nagel Significance Due to the lower luminosity of the young Sun, climate modelers struggle to explain why the climate on early Earth was not freezing cold.
Ingredients for microbial life preserved in 3.5 billion-year-old fluid inclusions
Abstract It is widely hypothesised that primeval life utilised small organic molecules as sources of carbon and energy. However, the presence of such primordial ingredients in early Earth habitats has not yet been demonstrated. Here we report the existence of indigenous organic molecules and gases in primary fluid inclusions in c. 3.5-billion-year-old barites (Dresser Formation, Pilbara Craton, Western Australia).
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