Chronology of the Solar System’s Oldest Solids

By J. Connelly, Y. Amelin, A. Krot, M. Bizzarro. 2008

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In Astronomy and Astrophysics

Citations in the corpus

26 Al- 26 Mg and 207 Pb- 206 Pb systematics of Allende CAIs: Canonical solar initial 26 Al/ 27 Al ratio reinstated (2008, result): “…of fractions before leaching, between 20 and 71 ppb, and Pb concentrations between 56 and 252 ppb, are similar to the values reported previously for Allende and Efremovka CAIs (Chen and Tilton 1976; Tatsumoto et al., 1976; Chen and Wasserburg, 1981, Amelin et al., 2002; Connelly et al., 2008).”
U-Pb chronology of the Solar System's oldest solids with variable 238 U/ 235 U (2010, methodology): “The difference in Pb isotopic ages between CAI SJ101 (black rectangle) and Allende chondrules dated by Amelin and Krot 2007 (striped rectangle), and by Connelly et al. 2008 (grey rectangle).”
ALMA Survey of Lupus Protoplanetary Disks. II. Gas Disk Radii (2018, result): “…probe dust grains up to roughly cm sizes; this scenario is more consistent with evidence from our own solar system, which points to the formation of mm- to cm-sized chondrules (e.g., Connelly et al. 2008) and even the differentiation of asteroids (e.g., Kleine et al. 2002) within just a few Myr.”
Crustal evolution and the temporality of anorthosites (2017, background): “They are characterized by very calcic plagioclase (An93–98), and all have magmatic crystallization ages> 4.3 Ga, suggesting that the earliest planetary crust-forming processes on the Moon, and possibly elsewhere, involved substantial, if not total melting.”
The Birth Environment of the Solar System (2010, background): “Recent work (Connelly et al. 2008) measures the age of the lead system 207Pb–206Pb in the chondrules of Allende, and finds an age of 4565.45 ± 0.45 Myr.”
THE LONG-TERM EVOLUTION OF THE GALACTIC DISK TRACED BY DISSOLVING STAR CLUSTERS (2010, background): “…to produce enough of it in situ (7Be, 26Al, 26Cl, and 53Mn; Duprat & Tatischeff 2008), or because timing constraints show that the element in question must have been injected in a single burst rather than produced over an extended period (26Al; Thrane et al. 2006; Connelly et al. 2008).”
Hf-W chronology of the accretion and early evolution of asteroids and terrestrial planets (2009, background): “Based on 26Al–26Mg and Pb–Pb ages it is well established that most chondrules formed 2–3 Myr after CAIs (Kita et al., 2000; Amelin et al., 2002; Kunihiro et al., 2004; Rudraswami and Goswami, 2007; Connelly et al., 2008a; Kurahashi et al., 2008; Rudraswami et al., 2008).”
Hf–W mineral isochron for Ca,Al-rich inclusions: Age of the solar system and the timing of core formation in planetesimals (2008, methodology): “10 and is consistent with the conclusions of Amelin (2008a) and Connelly et al. (2008b) that the complex U–Pb systematics of Sahara 99555 compromise its use as an absolute time marker for short-lived chronometers.”
EVIDENCE FOR MAGNESIUM ISOTOPE HETEROGENEITY IN THE SOLAR PROTOPLANETARY DISK (2011, background): “The SAH99555 angrite is one of the most pristine basaltic meteorites and has been dated via both the Pb–Pb and 26Al–26Mg methods by a number of groups (Connelly et al. 2008b; Amelin 2008; Schiller et al. 2010).”
Chondrites as samples of differentiated planetesimals (2009, background): “10 Metamorphism of chondrite parent bodies appears to stretch for tens of millions of 11 years, though peak temperatures for the CV parent body were reached at 5 to 10 Ma after 12 CAIs, based on I-Xe chronometry for Allende (Swindle 1998).”
The lunar magma ocean: Reconciling the solidification process with lunar petrology and geochronology (2011, unknown): “calcium–aluminum inclusions in the meteorite Allende (Connelly et al., 2008).”