Imbrian-age highland volcanism on the moon: the gruithuisen and mairan domes.
نویسندگان
چکیده
The Gruithuisen and Mairan domes on the moon represent morphologically and spectrally distinct nonmare extrusive volcanic features of Imbrian age. The composition, morphology, and age relationships of the domes indicate that nonmare extrusive volcanism in the northern Procellarum region of the moon continued until about 3.3 x 10(9) to 3.6 x 10(9) years ago and was partially contemporaneous with the emplacement of the main sequence of mare deposits.
منابع مشابه
Stratigraphic sequence and ages of volcanic units in the Gruithuisen region of the Moon
[1] Several domes indicative of non-mare volcanism, morphologically as well as spectrally distinct from surrounding mare and highland units, are located in the Gruithuisen region in northern Oceanus Procellarum. The determination of the nature and age of non-mare volcanism helps to put constraints on lunar crustal evolution. The ages of the domes were previously thought to be mid-Imbrian or pos...
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[1] The lunar steep-sided Gruithuisen and Mairan domes are morphologically and spectrally distinctive structures and appear similar to terrestrial extrusive volcanic features characterized by viscous magma. We use the basic morphologic and morphometric characteristics of the domes to estimate the yield strengths ( 10 Pa), plastic viscosities ( 10 Pa s), and effusion rates ( 50 m/s) of the magma...
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Lunar volcanic deposits are dominated by areally extensive mare units occurring in regionally low areas predominantly on the lunar near side. Data obtained from lunar orbit and earth-based observations have been used to extend the detailed characterizations derived from Apollo and Luna sample return missions to other parts of the moon. Mare volcanism occurred over a period of about 1.3 billion ...
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[1] Basaltic mare materials extruded between ∼ 4 Ga and ∼ 1.2 Ga ago and formed large expanses on the lunar nearside. In contrast to the maria, volcanic shields, domes, and cones also occur but cover only a small area of the total lunar surface. One specific type of dome is characterized (1) by steep slopes, (2) by a high albedo similar to lunar highlands, and (3) by a strong absorption in the ...
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ورودعنوان ژورنال:
- Science
دوره 199 4336 شماره
صفحات -
تاریخ انتشار 1978