Randy L. Korotev, Ryan A. Zeigler, & Bradley L. Jolliff Do we have a

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Presentation transcript:

Randy L. Korotev, Ryan A. Zeigler, & Bradley L. Jolliff Do we have a meteorite from the South Pole-Aitken Basin of the Moon?

lunar farside %FeO ppm Th 5 10 15 20 2 6 10 12 4 8 feldspathic highlands feldspathic highlands Clementine Lucey et al. (2000) Lunar Prospector Lawrence et al. (2000) 5 10 15 20 2 6 10 12 4 8 %FeO ppm Th

lunar farside %FeO ppm Th 5 10 15 20 2 6 10 12 4 8 SPA SPA Clementine Lucey et al. (2000) Lunar Prospector Lawrence et al. (2000) 5 10 15 20 2 6 10 12 4 8 %FeO ppm Th

all lunar meteorites

linear Sm log Sm all lunar meteorites KREEPic basaltic feldspathic

linear Sm log Sm all lunar meteorites KREEPic basaltic feldspathic Calcalong Creek Dhofar 961 basaltic feldspathic

nonmare lunar meteorites (i.e., those with <12% FeO) “KREEP” nonmare lunar meteorites (i.e., those with <12% FeO) SaU 169 anorthosite Dhofar 489

nonmare lunar meteorites (i.e., those with <12% FeO) Dhofar 733

nonmare lunar meteorites (i.e., those with <12% FeO) SaU 169 IMB SaU 169 RB NWA 4472/85 Calcalong Creek Dhofar 961

most ferroan anorthosite is An96-97 and 0.8 ± 0.1 µg/g Eu

Dhofar 733 Kalahari 008 Yamato 82/86

nonmare Apollo samples N = 1860, 10-100 mg <12% FeO & <30 ppm Sc

nonmare Apollo samples with nonmare lunar meteorites SaU 169

increasing phosphates Na in plagioclase alkali anorthosite KREEP SaU 169 plag increasing phosphates ol & px

nonmare Apollo samples with nonmare lunar meteorites

Dhofar 733 Calcalong Creek Dhofar 961

Dhofar 961

Calc. Cr. Dhofar 961

Apollo Mg-suite norites & troctolites Calc. Cr. Dhofar 961

probably paired Dhofar 961 – our sample Dhofar 925, 49 g photos by Norbert Classen

big grains of FeNi with composition like IAB irons 1 2 3 4 5 mm big grains of FeNi with composition like IAB irons our sample contains 0.7% metal by mass