The Utopia/Isidis overlap: Possible conduit for mud volcanism on Mars
The Utopia/Isidis overlap: Possible conduit for mud volcanism on Mars
复制标题
乌托邦/伊西迪斯重叠：火星上泥火山活动的可能渠道
DOI：
10.1016/j.icarus.2011.01.025
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发表时间：
2010
期刊：
影响因子：
3.2
通讯作者：
E. McGowan
中科院分区：
文献类型：
--
作者：
E. McGowan
火星上最大的坑锥分布集中在乌托邦盆地的西南部。这个特殊的坑锥区域被归因于泥火山活动;几个因素可能促进了这个位置的广泛泥火山活动。坑锥的集中位于Utopia盆地与Isidis盆地相交处;两个特征都是多环撞击盆地。在地球上，地震调查表明，希克苏鲁布多环撞击盆地的外环延伸到莫霍罗维奇不连续面。如果这在火星上也是真的，那么裂缝可以作为来自乌托邦平原的水的管道，乌托邦平原是一个大型的假定水体的所在地。已经证明甲烷可以在地球上的地幔中产生。在火星上，这种可能的甲烷来源可以与渗透的水结合联合收割机，产生笼形物。虽然甲烷目前没有在坑坑洼洼的圆锥体位置释放，但过去可能会释放。在火星上已经观察到三个甲烷释放的位置，其中两个位于伊西迪斯盆地的同一外环，与坑锥种群相交。包含大量有坑球果的Utopia盆地区域邻近高地/低地边界，在该边界处可能发生大量沉积。广泛的沉积与甲烷释放的潜力相结合，可能有助于在乌托邦盆地的这一地区的大量人口的坑锥。
The largest areal concentration of pitted cones on Mars is located in the southwest section of Utopia basin. This particular area of pitted cones has been attributed to mud volcanism; several factors may have facilitated extensive mud volcanism at this location. The concentration of pitted cones is located where Utopia basin intersects Isidis basin; both features are multi-ring impact basins. On Earth, seismic investigations have shown that the outer rings of the Chicxulub multi-ring impact basin extend to the Mohorovičić discontinuity (Moho). If this is true on Mars as well, the fractures could act as conduits for water from Utopia Planitia, the site of a large, putative water body. It has been shown that methane can be generated at the mantle on Earth. On Mars this possible source of methane could combine with the infiltrated water to generate clathrates. While methane is not currently being released at the location of the pitted cones it could have been in the past. Three locations of methane release have been observed on Mars, two of which are located on the same outer ring of Isidis basin that intersects the pitted cone population. The area of Utopia basin that contains the large population of pitted cones is adjacent to the highland/lowland boundary where extensive deposition would have occurred. Extensive deposition combined with the potential for methane release may have contributed to the large population of pitted cones in this area of the Utopia basin.