H
Henning Haack
Researcher at University of Copenhagen
Publications - 70
Citations - 3124
Henning Haack is an academic researcher from University of Copenhagen. The author has contributed to research in topics: Meteorite & Chondrite. The author has an hindex of 28, co-authored 70 publications receiving 2942 citations. Previous affiliations of Henning Haack include Bethel University & University of Hawaii at Manoa.
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Mg isotope evidence for contemporaneous formation of chondrules and refractory inclusions
TL;DR: The presence of excess 26Mg resulting from in situ decay of the short-lived 26Al nuclide in CAIs and chondrules from the Allende meteorite is reported, indicating that Allende chondrule formation began contemporaneously with the formation of CAIs, and continued for at least 1.4 Myr.
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Early planetesimal melting from an age of 4.5662 Gyr for differentiated meteorites
TL;DR: The results indicate that the accretion of differentiated planetesimals pre-dated that of undifferentiated planetesIMals, and reveals the minimum Solar System age to be 4.5695 ± 0.0002 billion years.
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Rapid Timescales for Accretion and Melting of Differentiated Planetesimals Inferred from 26Al-26Mg Chronometry
TL;DR: In this paper, high-precision Mg isotope measurements of bulk samples of basalt, gabbro, and pyroxenite meteorites obtained by multiple-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) are reported.
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Icelandic analogs to Martian flood lavas
Laszlo P. Keszthelyi,Thorvaldur Thordarson,Alfred S. McEwen,Henning Haack,Marie-Noëlle Guilbaud,Stephen Self,Matti J. Rossi +6 more
TL;DR: In this article, the same authors report on field observations from Icelandic lava flows that have the same surface morphology as many Martian flood lava flows and conclude that these breccias are formed by the disruption of an initial pahoehoe surface by a large flux of liquid lava within the flow.
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Early history of Earth's crust-mantle system inferred from hafnium isotopes in chondrites
TL;DR: This λ176Lu value indicates that Earth's oldest minerals were derived from melts of a mantle source with a time-integrated history of depletion rather than enrichment, consistent with timing inferred from extinct radionuclides.