Temperature, age and crust thickness distributions of Loki Patera on Io from Galileo NIMS data: Implications for resurfacing mechanism
Temperature, age and crust thickness distributions of Loki Patera on Io from Galileo NIMS data: Implications for resurfacing mechanism
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来自伽利略 NIMS 数据的木卫一上 Loki Patera 的温度、年龄和地壳厚度分布：对表面重修机制的影响
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发表时间：
2003
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通讯作者：
A. Davies
中科院分区：
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作者：
A. Davies
伽利略NIMS仪器的高空间分辨率，多波长观测已经被分析，以确定大部分爱奥尼亚火山洛基火山口的温度和面积分布。通过对数据进行双温度拟合得到的冷却器组件的温度可用于确定表面的年龄。沿着沿着横跨破火山口底部的剖面，底部的年龄从100天到180天不等。这使得在2001年7月/8月初开始重铺路面，产生约1公里/天的重铺速度，与新的熔岩蔓延从西南角的破火山口在东北方向。这一速度与熔岩湖上地壳下沉而重铺路面的速度一致。然而，温度分布也可能是由流动的就位引起的。隐含的地壳厚度（使用熔岩冷却模型得出）范围从2.6到0.9米。
A high‐spatial‐resolution, multi‐wavelength observation by the Galileo NIMS instrument has been analysed to determine the temperature and area distribution of a large portion of the ionian volcano Loki Patera. The temperatures of the cooler components from a two‐temperature fit to the data can be used to determine ages of the surface. The age of the floor along a profile across the floor of the caldera ranges from ∼10 to ∼80 days. This puts the start of the resurfacing in July/early August 2001, yielding a resurfacing rate of approximately 1 km/day, with the new lava spreading from the SW corner of the caldera in a NE direction. This rate is consistent with resurfacing by foundering of the crust on a lava lake. However, the temperature distribution may also result from the emplacement of flows. Implied crust thicknesses (derived using a lava cooling model) range from 2.6 to 0.9 m.