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题名: The Thickness and Scale of Late-stage Basalts in Oceanus Procellarum
作者: Hu Xiaoyi; Chen Yuan; Zhang Xunyu; Li Shaolin; Xia Xueqi; Wu Yunzhao
刊名: Acta Astronomica Sinica(天文学报)
出版日期: 2018
卷号: 59, 期号:2, 页码:14
英文摘要: Oceanus Procellarum, the largest lunar mare, distributes large areas of Eratosthenian basalts. Research on the thickness, volume, and eruption flux of the late-stage basalts is essential for understanding the late thermal evolution of Oceanus Procellarum, even the Moon. The Eratosthenian basalts are rich in olivine and ilmenite, while the underlying Imbrian basalts are rich in pyroxene. Their significant spectral differences are easy to be distinguished using the hyperspectral data. We determined whether the crater has penetrated the overlying basalts layer by the Moon Mineralogy Mapper (M3) data, and estimated the thickness of Eratosthenian basalts in the Oceanus Procellarum using a crater excavation technique. A high-resolution thickness distribution map of the last-stage basalts within the Oceanus Procellarum has been acquired. The results show that the average thickness of Eratosthenian basalts in the Oceanus Procellarum varies from ~(242) m to ~(882) m. Among them, the thickness of Eratosthenian basalts in the western Aristarchus is the greatest (> 60 m), whereas the southernmost study area has a minimum thickness of about 28-31 m. The basalt thickness at the Chang'E-5 potential landing site is about 31-38 m. The thickness of Eratosthenian basalts in the eastern Marius is ~35 to 45 m,which is much smaller than that of 100 to 300 m estimated by Weider et al. The total volume of Eratosthenian basalts is estimated to be ~1.39 * 10~4 km~3, which is only about 1.6% of all basalts in Oceanus Procellarum. This indicates that the magmatism in Eratosthenian period has been greatly weakened compared to the Imbrian period.
语种: 英语
WOS记录号: CSCD:6209184
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/18078
Appears in Collections:近地天体探测和太阳系天体研究团组_期刊论文

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