Zircon from the Moon , Earth and Mars
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چکیده
منابع مشابه
Early History of the Moon: Zircon
Introduction: The Moon is believed to have formed from debris produced by a giant impact of a Mars sized body with the Earth (at around 4.51 Ga), forming a primitive body with a thick global layer of melt referred to as the Lunar Magma Ocean (LMO) [1]. The crystallization of LMO created internal strati-fication of the Moon forming main geochemical reservoirs. The surface features on the Moon we...
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Zircon grains were separated from lunar regolith and rocks returned from four Apollo landing sites, and analyzed in situ by secondary ion mass spectrometry. Many regolith zircons preserve magmatic dO and trace element compositions and, although out of petrologic context, represent a relatively unexplored resource for study of the Moon and possibly other bodies in the solar system. The combinati...
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Introduction: Zircons are difficult to destroy yet can bear witness to the occurrence and sometimes age of major impact events [e.g. 1]. The zirconium mineral record consequently has implications for the tempo and nature of early bombardment and ultimately the evolution of planetary crusts, hydrospheres and life. Recent models that rescale impactor flux according to a saw-tooth decay in lunar i...
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