Potassium and Calcium in Lunar Impact Spherules

نویسندگان

  • J. Levine
  • R. A. Muller
  • P. R. Renne
  • R. A. Rohde
چکیده

Renne, and R. A. Rohde, Department of Physics, University of California, Berkeley, California 94720, USA, Presently at Chicago Center for Cosmochemistry and Department of Geophysical Sciences, University of Chicago, Chicago, Illinois 60637, USA ([email protected]), Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA, Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, California 94709, USA, Department of Earth and Planetary Science, University of California, Berkeley 94720, USA.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Lunar Impact History from Apollo 12 Glass Spherules

Introduction: Glass spherules in lunar soils are formed by meteoroid impacts on the lunar surface, though some are believed to be due to volcanic firefountaining events [1]. We recently reported [2] the ages of 155 lunar spherules from Apollo 14 soil sample 14163, determined by the Ar/Ar isochron technique. These spherules are all inferred to have been formed in impacts, and, since the sample w...

متن کامل

Lunar Meteorite Dhofar 026: a Second-generation Impact Melt

Introduction: The meteorite Dhofar 026 (Dh26) was found in Oman in January, 2000 [1]. It is a clastpoor, anorthositic, crystalline melt breccia with no fusion crust and little terrestrial weathering. Solar wind abundance measurements show that it is unpaired with the lunar regolith breccia Dhofar 025 [2]. The Dh26 oxygen isotopic composition indicates its lunar origin [3], while its majorand tr...

متن کامل

Petrography and Chemistry of Impact-melt Clasts in Apollo

Introduction: The preponderance of 3.9 Ga lunar impact-melt rock ages and the dearth of older samples of unequivocal impact origin, from either the Apollo collection or lunar meteorites, suggest an extraordinary bombardment event in the Earth-Moon system at ~3.9 Ga. We have begun to study another set of samples, impact melts and crystalline lunar spherules (CLS) within demonstrably old Apollo b...

متن کامل

Petrography and Chemistry of Impact-melt Clasts in Apollo 16 Breccias

Introduction: The preponderance of 3.9 Ga lunar impact-melt rock ages and the dearth of older samples of unequivocal impact origin, from either the Apollo collection or lunar meteorites, suggest an extraordinary bombardment event in the Earth-Moon system at ~3.9 Ga. We have begun to study another set of samples, impact melts and crystalline lunar spherules (CLS) within demonstrably old Apollo b...

متن کامل

Oxygen isotope ratios of large cosmic spherules: Carbonaceous and ordinary chondrite parent bodies

Oxygen isotope ratios of large cosmic spherules: Carbonaceous and ordinary chondrite parent bodies Conference Item How to cite: Suavet, C.; Alexandre, A.; Franchi, I. A.; Gattacceca, J.; Sonzoghi, C.; Greenwood, R. C.; Folco, L. and Rochette, P. (2009). Oxygen isotope ratios of large cosmic spherules: Carbonaceous and ordinary chondrite parent bodies. In: 40th Lunar and Planetary Science Confer...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2006