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Geologic Map of Aphrodite Map Area (AMA; I‐2476), Venus

机译:阿芙罗狄蒂地图区域的地质图(AMA; I-2476),金星

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We present a 1:10‐M‐scale geologic map of the Aphrodite Map Area (AMA) of Venus (0°N–57°S/60–80°E). Geologic mapping employed NASA Magellan synthetic aperture radar and altimetry data. The AMA geologic map, with detailed structural elements and geologic units covering over one eighth of Venus' surface, affords an important and unique perspective to test models of global‐scale geologic processes through time. Geologic relations record a history inconsistent with global catastrophic resurfacing. The AMA displays a regional coherence of preserved geologic patterns that record three sequential geologic eras: the ancient era, the Artemis superstructure era, and the youngest fracture zone era. The ancient era and Artemis superstructure, with a footprint covering more than 25% of the surface, are recorded in the Niobe Map Area to the north. The latter two eras likely overlap in time. The fracture zone domain, part of a globally extensive province, marks the most spatially focused tectonomagmatic domain within the AMA. Impact craters are both cut by and overprint fracture zone structures. Twelve percent of AMA impact craters that occur within the fracture zone domain predate or formed during fracture zone development. This observation indicates the relative youth of the fracture zone era and is consistent with the possibility that this domain remains geologically active. The AMA records a rich geologic history of large tract of the surface of Venus and provides an important framework to formulate new working hypotheses of Venus evolution and contribute to planning future studies of the surface of planets.
机译:我们介绍了金星(0°N-57°S / 60-80°E)的Aphrodite地图区域(AMA)的1:10-M级地质图。地质映射采用NASA Magellan合成孔径雷达和高级标准数据。 AMA地质地图,具有详细的结构元素和地质单位,覆盖在金星表面的一个八分之一,通过时间来测试全球尺度地质流程的模型。地质关系记录了一种与全球灾难性复原的历史不一致。 AMA展示了纪录三个顺序地质时代的保存地质模式的区域一致性:古代时代,Artemis Supersture Era和最年轻的骨折区。古代时代和阿尔忒弥斯上层结构,占地面积超过25%的表面,在Niobe地图区域录制到北方的北极地图。后两种时代可能及时重叠。骨折区域领域,全球广泛省的一部分,标志着AMA内最空间聚焦的Tectononomatic结构域。冲击陨石坑均均切割和叠印骨折区结构。 12%的AMA冲击陨石坑在骨折区域域内发生在裂缝区的开发期间形成或形成。该观察表明骨折区时代的相对青少年,并与该领域仍然是地质上活跃的可能性一致。 AMA记录了金星表面的丰富地质历史,并提供了一个重要的框架,以制定金星演变的新工作假设,并有助于规划天球表面的未来研究。

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