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首页> 外文期刊>Planetary and space science >A Lunar Cryptomare Dome Near Mee H And Drebbel f
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A Lunar Cryptomare Dome Near Mee H And Drebbel f

机译：Mee H和Drebbel f附近的月球圆顶

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In this study, we examine the lunar mare dome Mee 1 situated near the craters Mee H and Drebbel F in a region showing evidence of ancient (pre-Orientale) mare volcanism and cryptomare deposits. Regional stratigraphic relations indicate that Mee 1 was formed prior to the Orientale impact at the beginning of the Imbrian period. Based on a combined photoclinometry and shape from shading technique applied to telescopic CCD images of the dome acquired under oblique illumination, we determined a diameter of Mee 1 of 25 km, a height of 250m,aflank slope of 1.15° , and a volume of 44 km~3. Based on rheologic modelling of the dome and a viscoelastic model of the feeder dike, we obtained a magma viscosity of 5.1 × 10~5 Pa s, an effusion rate of 869 m~3 s~(-1), a duration of the effusion process of 1.6 years, a magma rise speed of 1.9 × 10~4 ms~(-1), a width of the feeder dike of 32 m, and a horizontal dike length of 144 km. A comparison of Mee 1 with domes with similar morphometric properties, which are located near Milichius and inside the crater Petavius, reveals strong similarities with respect to the viscosity of the dome-forming magma and the feeder dike geometry, while the effusion rate and magma rise speed of Mee 1 are somewhat higher. The pronounced morphometric differences between Mee 1 and a smaller dome situated close to the crater Doppelmayer and characterised by a similar magma viscosity suggest that the growth of that dome was limited by exhaustion of the magma reservoir, while Mee 1 and the other larger domes display morphometric properties presumably coming closer to the cooling limit. The comparison of the ancient dome Mee 1 with the younger (Eratosthenian) edifices near Milichius and Doppelmayer suggests that the conditions in the upper mantle and the crust favoured high eruption volumes, effusion rates, and magma rise speeds, implying the occurrence of large magma reservoirs preventing the limitation of dome growth by magma exhaustion. On the other hand, we observe similar general morphometric, rheologic, and feeder dike characteristics and, thus, conclude that the formation conditions of lunar mare domes did not change fundamentally during the Imbrian period.
机译：在这项研究中，我们研究了一个月球母马圆顶Mee 1，该月球在Mee H和Drebbel F火山口附近，该地区显示出古老的（东方前）母马火山活动和隐are沉积物。区域地层关系表明，Mee 1的形成是在伊布连世初期开始的，对东方的影响。基于组合的光度法和阴影技术的形状，将阴影技术应用于在倾斜照明下获取的圆顶的伸缩CCD图像，我们确定Mee 1的直径为25 km，高度为250m，侧面倾斜度为1.15°，体积为44公里〜3。根据圆顶的流变学模型和支线堤的粘弹性模型，我们得出岩浆粘度为5.1×10〜5 Pa s，渗出速率为869 m〜3 s〜（-1），渗出持续时间历时1.6年，岩浆上升速度为1.9×10〜4 ms〜（-1），馈线堤防宽度为32 m，水平堤防长度为144 km。 Mee 1与位于米利基乌斯附近和火山口佩塔维乌斯内部的具有相似形态特征的圆顶的比较显示，圆顶形成岩浆的粘度和支线堤的几何形状具有很强的相似性，而积水率和岩浆上升Mee 1的速度较高。 Mee 1和靠近火山口Doppelmayer且具有相似岩浆粘度的较小圆顶之间的明显形态学差异表明，该圆顶的生长受到岩浆储层耗尽的限制，而Mee 1和其他较大圆顶则显示形态性能大概接近冷却极限。将古代圆顶Mee 1与Milichius和Doppelmayer附近的较年轻的（Eratosthenian）建筑物进行比较表明，上地幔和地壳的条件有利于高喷发量，积水率和岩浆上升速度，这意味着存在大型岩浆储层。防止由于岩浆耗尽而限制圆顶的生长。另一方面，我们观察到了类似的一般形态，流变学和支线堤防特征，因此得出结论，在伊布里亚时期，月球穹顶的形成条件没有根本改变。

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