The vanadium isotopic composition of lunar basalts

Understanding the Chlorine Isotopic Composition of Apatites in Lunar Basalts

Introduction: On Earth δCl = ~0 ± 5 ‰ [1]. For lunar rocks elevated δCl values of up to 35 ‰ have been reported in apatites [1,2]. The initial study interpreted the elevated δCl in lunar rocks as a result of metal chlorides degassing in low-H2O environments [1]. Additional data [3,4] have shown high-δCl values in samples with apatite containing appreciable amounts of H2O (>2000 ppm). Metasomati...

Understanding the Chlorine Isotopic Compositions of Apatites in Lunar Basalts

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Oxygen Isotopic Composition of Mare- Basalts: Magma Ocean Differentiation

BASALTS: MAGMA OCEAN DIFFERENTIATION AND SOURCE HETEROGENEITY. L.J. Hallis, R.C. Greenwood, M. Anand, S.S. Russell, M. F. Miller and I. A. Franchi. [email protected]. Department of Mineralogy, The Natural History Museum, Cromwell Rd, London, SW7 5BD, UK. Dept. of Earth and Environmental Sciences, The Open University, Milton Keynes MK7 6AA, UK. PSSRI, The Open University, Milton Keynes MK7 6AA,...

Chlorine in Lunar Basalts

Petrogenetic association of the oldest lunar basalts: Combined Rb–Sr isotopic and trace element constraints

We report a new radiometric Rb–Sr age determination of 4.0370.04 Ga for high-Al basaltic clast 14321,1353, which is a Group B Apollo 14 high-Al basalt based on its whole-rock incompatible-traceelement chemistry. In addition, available literature Rb–Sr isotope data for Apollo 14 high-Al basalts were reprocessed using the same decay constant and data reduction protocol as used for sample 14321,13...