加载中…Volcanic ash in Meridiani Planum火山灰在子午线平原
(2010-05-13 22:47:00)
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Volcanic ash in Meridiani Planum 火山灰在子午线平原
2010年5月12日 12 May
2010
颜色的火山灰沉积这个子午线平原认为，正如火星快车高分辨率立体照相机看到。
Deposits of volcanic ash colour this view of the Meridiani Planum,
as seen by the Mars Express High Resolution Stereo Camera.
他们还给予线索风向在这个火星区域。 They also give clues to
the prevailing wind direction in this region of Mars.
Meridiani Planum
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鉴于子午线平原透视 Perspective view of Meridiani
Planum
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子午线平原的中央火山口 Meridiani Planum's central
crater
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在图像的中心，一个陨石坑地面将近50公里宽覆盖着黑色的物质。 In the
centre of the image, the floor of an impact crater almost 50 km
wide is covered in dark material. 这类似于火山灰，这是主要组成矿物如辉石和橄榄石。 This resembles
volcanic ash, which is predominantly composed of minerals such as
pyroxene and olivine. 通过黑暗覆盖挑逗小土堆，可能更多的材料制成。 Poking through the
dark covering are small mounds, probably made of more resistant
material. 他们周围的软物质已被侵蚀和吹制出的东北风火山口，现在的形式对周围环境的暗条纹。
The softer material around them has been eroded and blown out of
the crater by north-easterly winds and now forms dark streaks on
the surroundings.
一个陨石坑仅15公里宽，到左上角，在其展品的相同西南部边缘黑色的物质。 An impact crater just 15 km wide, to the upper left, exhibits the same dark material on its south-western edge. 很可能，这种材料是从大到一个较小的火山口吹。 It is likely that this material was blown into the smaller crater from the larger one. 近黑色的结构是几乎可以肯定的火山灰丰富的沉积物了沙丘。 The nearly black structures are almost certainly dunes made of volcanic ash-rich sediments. 相比之下，34公里宽的陨石坑，以图像的右下角，主要是充满了轻型材料。 In contrast, the 34-km-wide impact crater to the lower right of the image is largely filled with light material.
南部地区，到下面的小弹坑图像左右，展品黑暗的功能。 The southern area, to the left of the image below the smaller crater, exhibits dark features. 在山脊位于背风面，这些都是灰丰富的物质可能类似存款，再吹出来的火山口。 Located on the lee side of ridges, these are probably similar deposits of ash-rich material, again blown out of the crater.
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