High-titanium mare basalts
Web1 nov 2001 · Abstract. The last major phase of lunar volcanism produced extensive high-titanium mare deposits on the western nearside which remain unsampled by landing … WebAbstract. The Moon is the sole known locality of exposed high-titanium (high-Ti) basalts in the solar system, but their occurrence has implications for the early evolution of the …
High-titanium mare basalts
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Web10 set 2010 · Some mare basalts contain unusually high amounts of titanium oxide (TiO2) in addition to iron oxide, making for even lower reflectance. TiO2 also shifts the color of the mare from red to blue. › View larger image Color variations on the Moon are subtle; just look at the Moon with your eye. WebSeven spectrally distinct basaltic units, which range in age from 2.5±0.5 b.y. to 3.65±0.15 b.y., have been identified. Three have been formally named and related to the …
Web开馆时间：周一至周日7:00-22:30 周五 7:00-12:00; 我的图书馆 Web19 ott 2024 · The µ value of the Chang’e-5 basalt mantle source is within the range of low-titanium and high-titanium basalts from Apollo sites (µ value of about 300–1,000), but …
WebThe high-titanium basaltic eruptions occurring during the last volcanic activity period can be explained by the three possible scenarios (1) the ilmenite-bearing cumulate rich layer in the core-mantle boundary formed after the mantle overturn, (2) the basaltic material layers beneath the lunar crust formed through upwelling magmas, and (3) … Web30 set 2024 · The younger high-titanium basalts (i.e., 41 and 80) were also observed and characterized by Pieters (1978) as spectrally blue basalts due to their high UV/VIS ratio, which to a first order is consistent with higher titanium content. Except for area 41 and 80, all spectra show similar band locations near1000and2000nm(Fig. 3b).
Web1 feb 2024 · Basalt fragment 71597 is the sole high-titanium mare basalt showing evidence for olivine accumulation during formation. The petrogenesis of this unique sample was …
Web10 ott 2024 · Laboratory spectroscopic and X-ray diffraction analyses on the Chang’E-5 lunar soil samples have demonstrated that the spectral features of lunar late-stage mare basalts are representative of ... engineer a situationWebThe large, fresh crater Tycho in the nearside lunar highlands has an extensive system of bright rays covering approximately 560,000 km 2 , containing dense clusters of secondary craters. Examination of crater densities in several clusters shows that Tycho produced almost 10 6 secondary craters larger than 63 m diameter. This is a lower limit, because … dreamcast sega rally 2WebCalculated values of log alpha SiO2 in lunar magmas range from approximately -0.8 to unity in the temperature range of 1100-1300 C. High-titanium mare basalts begin crystallizing at silica activities insufficient for orthopyroxene saturation; in contrast to terrestrial lavas, silica activities rise substantially with crystallization and cause silica saturation in the residuum. dreamcast screenshotsWebAbstract— Lunar mare basalt sample data suggest that there is a bimodal distribution of TiO 2 concentrations. Using a refined technique for remote determination of TiO 2, we … engineer as a careerWeb1 feb 1974 · Two distinct chemical basalt types have been sampled at the Apollo 17 landing site. Very high-titanium basalts (about 13 wt % TiO2) are the dominant type and display a textural range from olivine ... dreamcast scooter gameWebWe found that the increase in the mean titanium content occurred within a relatively short period near approximately 2.3 Ga, suggesting that the magma source of the mare basalts changed at this particular age. Moreover, the high-titanium basaltic eruptions are correlated with a second peak in volcanic activity near ~2 Ga. dreamcast serial port hddWeb7 set 2001 · Basaltic volcanism is responsible for the lunar maria—the dark, smooth plains that fill ancient basins on the Moon. This volcanism must have occurred after the magma ocean had solidified. Mare volcanism is caused by the remelting of iron-rich cumulate rocks, deep in the lunar mantle (below 400 km). engineer associate salary