Extraterrestrial spinels and the astronomical perspective on Earth's geological record and evolution of life
B Schmitz - Geochemistry, 2013 - Elsevier
Relict spinel grains (~ 25–250μm in diameter) from decomposed extraterrestrial material in
Archean to Recent sediments can be used to reconstruct variations in the flux of different …
Archean to Recent sediments can be used to reconstruct variations in the flux of different …
A single asteroidal source for extraterrestrial Ordovician chromite grains from Sweden and China: High-precision oxygen three-isotope SIMS analysis
We examined oxygen three-isotope ratios of 48 extraterrestrial chromite (EC) grains
extracted from mid-Ordovician sediments from two different locations in Sweden, and one …
extracted from mid-Ordovician sediments from two different locations in Sweden, and one …
Extraterrestrial chromite distribution across the mid-Ordovician Puxi River section, central China: evidence for a global major spike in flux of L-chondritic matter
A Cronholm, B Schmitz - Icarus, 2010 - Elsevier
Previous studies of mid-Ordovician limestone in Sweden have shown that over a
stratigraphic interval representing a few million years there is a two orders-of-magnitude …
stratigraphic interval representing a few million years there is a two orders-of-magnitude …
A search for H-chondritic chromite grains in sediments that formed immediately after the breakup of the L-chondrite parent body 470 Ma ago
A large abundance of L-chondritic material, mainly in the form of fossil meteorites and
chromite grains from micrometeorites, has been found in mid-Ordovician 470 Ma old …
chromite grains from micrometeorites, has been found in mid-Ordovician 470 Ma old …
[HTML][HTML] Fragments of Late Eocene Earth-impacting asteroids linked to disturbance of asteroid belt
B Schmitz, S Boschi, A Cronholm, PR Heck… - Earth and Planetary …, 2015 - Elsevier
The onset of Earth's present icehouse climate in the Late Eocene coincides with
astronomical events of enigmatic causation. At∼ 36 Ma ago the 90–100 km large Popigai …
astronomical events of enigmatic causation. At∼ 36 Ma ago the 90–100 km large Popigai …
The mid-Ordovician Osmussaar breccia in Estonia linked to the disruption of the L-chondrite parent body in the asteroid belt
C Alwmark, B Schmitz, K Kirsimäe - Bulletin, 2010 - pubs.geoscienceworld.org
Abstract The Middle Ordovician (466 Ma) Osmussaar breccia, situated along the
northwestern coast of Estonia, is rich in angular chromite grains of extraterrestrial origin (> …
northwestern coast of Estonia, is rich in angular chromite grains of extraterrestrial origin (> …
A Russian record of a Middle Ordovician meteorite shower: extraterrestrial chromite at Lynna River, St. Petersburg region
A Lindskog, B Schmitz, A Cronholm… - Meteoritics & Planetary …, 2012 - Wiley Online Library
Numerous fossil meteorites and high concentrations of sediment‐dispersed extraterrestrial
chromite (EC) grains with ordinary chondritic composition have previously been …
chromite (EC) grains with ordinary chondritic composition have previously been …
Determining the impactor of the Ordovician Lockne crater: oxygen and neon isotopes in chromite versus sedimentary PGE signatures
Abundant chromite grains with L-chondritic composition in the resurge deposits of the
Lockne impact crater (458 Myr old; dia.~ 10 km) in Sweden have been inferred to represent …
Lockne impact crater (458 Myr old; dia.~ 10 km) in Sweden have been inferred to represent …
Large spinel grains in a CM chondrite (Acfer 331): Implications for reconstructions of ancient meteorite fluxes
K Bjärnborg, B Schmitz - Meteoritics & Planetary Science, 2013 - Wiley Online Library
By dissolving 30–400 kg of marine limestone in HC l and HF acid, our group has previously
recovered common relict chromite grains (approximately 63–250 μm) from ordinary …
recovered common relict chromite grains (approximately 63–250 μm) from ordinary …
A 3‐D study of mineral inclusions in chromite from ordinary chondrites using synchrotron radiation X‐ray tomographic microscopy—Method and applications
C Alwmark, B Schmitz, S Holm… - … & Planetary Science, 2011 - Wiley Online Library
A method is described for imaging in 3‐D the interiors of meteoritic chromite grains and their
inclusions using synchrotron radiation X‐ray tomographic microscopy. In ordinary …
inclusions using synchrotron radiation X‐ray tomographic microscopy. In ordinary …