Early History of the Moon: Zircon
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چکیده
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 were shaped by the subsequent collision with several large impac-tors during a short period of time (3.9-4.0 Ga). This process known as the Late Heavy Bombardment [2] is supported by models of planetary motion, suggesting that rapid migration of giant planets could have triggered a massive delivery of planetesimals from the asteroid belt into the inner Solar System at about 3.9 Ga [3]. Although, general chronology of LMO and LHB is well established using both long lived (U-Pb, Rb-Sr, 147 Sm-143 Nd and Ar-Ar) and extinct (
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