A Rb–Sr and Sm–Nd isotope geochronology and trace element study of lunar meteorite LaPaz Icefield 02205

Rankenburg, Kai; Brandon, A. D.; Norman, Marc D.

doi:10.1016/j.gca.2007.01.014

Cited by 39 publications

(39 citation statements)

References 72 publications

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“…This age is in agreement with ages determined using other isotopic systematics ( Fig. 10d; Nyquist et al 2005;Anand et al 2006;Rankenburg et al 2007). The three fragments analysed from basaltic fragmental breccia EET 96008 show evidence for a disturbance at ~631 Ma at the low temperature steps.…”

Section: Discussionsupporting

confidence: 91%

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⁴⁰Ar‐³⁹Ar age determinations of lunar basalt meteorites Asuka 881757, Yamato 793169, Miller Range 05035, La Paz Icefield 02205, Northwest Africa 479, and basaltic breccia Elephant Moraine 96008

Fernandes

Burgess

Morris

2009

Meteorit & Planetary Scien

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Ar analyses of several bulk fragments of related meteorites A-881757, Y-793169 and MIL 05035 give crystallization ages of 3.763 ± 0.046 Ga, 3.811 ± 0.098 Ga and 3.845 ± 0.014 Ga, which are comparable with previous age determinations by Sm-Nd, U-Pb Th-Pb, Pb-Pb, and Rb-Sr methods. These three meteorites differ in the degree of secondary 40 Ar loss with Y-793169 showing relatively high Ar loss probably during an impact event ~200 Ma ago, lower Ar loss in MIL 05035 and no loss in A-881757. Bulk and impact melt glass-bearing samples of LAP 02205 gave similar ages (2.985 ± 0.016 Ga and 2.874 ± 0.056 Ga) and are consistent with ages previously determined using other isotope pairs. The basaltic portion of EET 96008 gives an age of 2.650 ± 0.086 Ga which is considered to be the crystallization age of the basalt in this meteorite. The Ar release for fragmental basaltic breccia EET 96008 shows evidence of an impact event at 631 ± 20 Ma. The crystallization age of 2.721 ± 0.040 Ga determined for NWA 479 is indistinguishable from the weighted mean age obtained from three samples of NWA 032 supporting the proposal that these meteorites are paired. The similarity of 40 Ar-39 Ar ages with ages determined by other isotopic systems for multiple meteorites suggests that the K-Ar isotopic system is robust for meteorites that have experienced a significant shock event and not a prolonged heating regime.

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Section: Discussionsupporting

confidence: 91%

“…Previous age determinations for LAP 02205 are summarized in Table 1 and range between an Ar-Ar age of 2.95 ± 0.04 Ga and a Sm-Nd age of 3.15 ± 0.04 Ga (Nyquist et al 2005;Rankenburg et al 2007) and are indistinguishable from the Ar-Ar age of 2.985 ± 0.008 Ga obtained in this study. (Fig.…”

Section: Summary Of Ages and Comparison With Literature Datasupporting

confidence: 53%

⁴⁰Ar‐³⁹Ar age determinations of lunar basalt meteorites Asuka 881757, Yamato 793169, Miller Range 05035, La Paz Icefield 02205, Northwest Africa 479, and basaltic breccia Elephant Moraine 96008

Fernandes

Burgess

Morris

2009

Meteorit & Planetary Scien

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“…Both fractions came from the same 30 mg of homogenized powder. Crystallization ages for the samples in this study are from Rankenburg et al (2006), Rankenburg et al (2007), and references therein.…”

Section: Analytical Techniquesmentioning

confidence: 99%

“…Sources were evolved to the present-day so that the sources derived for samples with different crystallization ages can be compared directly. Crystallization ages for the samples in this study are from Rankenburg et al (2006), Rankenburg et al (2007), and references therein and listed in Table 1. Crystallization ages for the samples from Boyet and Carlson (2007) are listed in that paper.…”

Section: Coupled 142 Nd-143 Nd Models For Early Lunar Evolutionmentioning

confidence: 99%

“…Coupled 142 Nd-143 Nd isotope systematics have also been used in a variety of materials to determine the differentiation timescales and evolution of terrestrial bodies in the first several hundred million years of the solar system history (e.g. Nyquist et al, 1995;Harper et al, 1995;Borg et al, 1999;Caro et al, 2003;Foley et al, 2005;Boyet and Carlson, 2005;Andreasen and Sharma, 2006;Caro et al, 2006;Rankenburg et al, 2007;Debaille et al, 2007;Bennett et al, 2007;Boyet and Carlson, 2007;Caro et al, 2008). These studies have documented that early differentiation leading to Sm/ Nd ratios that are fractionated relative to average chondrites did occur during in the earliest histories of Earth, Mars, Moon, and the Eucrite Parent Body.…”

Section: Introductionmentioning

confidence: 99%

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Re-evaluating 142Nd/144Nd in lunar mare basalts with implications for the early evolution and bulk Sm/Nd of the Moon

Brandon

Lapen

Debaille

et al. 2009

Geochimica et Cosmochimica Acta

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ANSMET Meteorites from the Moon

Korotev

Zeigler

2014

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A Rb–Sr and Sm–Nd isotope geochronology and trace element study of lunar meteorite LaPaz Icefield 02205

Cited by 39 publications

References 72 publications

⁴⁰Ar‐³⁹Ar age determinations of lunar basalt meteorites Asuka 881757, Yamato 793169, Miller Range 05035, La Paz Icefield 02205, Northwest Africa 479, and basaltic breccia Elephant Moraine 96008

⁴⁰Ar‐³⁹Ar age determinations of lunar basalt meteorites Asuka 881757, Yamato 793169, Miller Range 05035, La Paz Icefield 02205, Northwest Africa 479, and basaltic breccia Elephant Moraine 96008

Re-evaluating 142Nd/144Nd in lunar mare basalts with implications for the early evolution and bulk Sm/Nd of the Moon

ANSMET Meteorites from the Moon

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A Rb–Sr and Sm–Nd isotope geochronology and trace element study of lunar meteorite LaPaz Icefield 02205

Cited by 39 publications

References 72 publications

40Ar‐39Ar age determinations of lunar basalt meteorites Asuka 881757, Yamato 793169, Miller Range 05035, La Paz Icefield 02205, Northwest Africa 479, and basaltic breccia Elephant Moraine 96008

40Ar‐39Ar age determinations of lunar basalt meteorites Asuka 881757, Yamato 793169, Miller Range 05035, La Paz Icefield 02205, Northwest Africa 479, and basaltic breccia Elephant Moraine 96008

Re-evaluating 142Nd/144Nd in lunar mare basalts with implications for the early evolution and bulk Sm/Nd of the Moon

ANSMET Meteorites from the Moon

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⁴⁰Ar‐³⁹Ar age determinations of lunar basalt meteorites Asuka 881757, Yamato 793169, Miller Range 05035, La Paz Icefield 02205, Northwest Africa 479, and basaltic breccia Elephant Moraine 96008

⁴⁰Ar‐³⁹Ar age determinations of lunar basalt meteorites Asuka 881757, Yamato 793169, Miller Range 05035, La Paz Icefield 02205, Northwest Africa 479, and basaltic breccia Elephant Moraine 96008