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Compositional and morphological analysis of Gassendi crater
Journal of Earth System Science ( IF 1.3 ) Pub Date : 2021-03-20 , DOI: 10.1007/s12040-021-01567-5
Arpita N Purohit , Shreekumari M Patel , Ashka D Thaker , Paras M Solanki

Gassendi impact crater is located on the western side of the visible lunar hemisphere just north of Mare Humorum. It has a diameter of 110 km, and it is a Floor Fractured Crater (FFC) belonging to Class-3 type that exhibits a wide annular depression or moat. Is Gassendi crater formed due to igneous intrusion or viscous relaxation? To investigate this, the analysis explores the compositional and morphological dimensions of the crater. The area studied has been found to contain various minerals such as LCP (Low Calcium Pyroxene), HCP (High Calcium Pyroxene), olivine, plagioclase, and mixtures of pyroxene and plagioclase. To differentiate between similar spectral profiles, Integrated Band Depth map (IBD) and Band Depth Parameter (BD) maps are generated using the M3 data. Features such as central peak complex, isolated mound, fractures, rimae, wall terraces, wall slumps, etc., have been identified and marked in the morphological map. We have also studied the morphometrical aspects of all the morphological features. Another impact crater just on the northern rim of Gassendi, Gassendi A crater shows the presence of LCP and olivine mineral along with extensive slumping, melt pool, and distorted northern rim. We have mapped the three mare regions towards the south of the crater floor and estimated their ages by using the CSFD technique. The present appearance of the Gassendi crater is mostly due to past volcanic activities rather than the result of the impact event.



中文翻译:

Gassendi火山口的组成和形态分析

Gassendi撞击坑位于马雷胡鲁姆(Mare Humorum)北部可见月球半球的西侧。它的直径为110公里,是属于Class-3类型的地面裂口陨石坑(FFC),具有宽环形凹陷或护城河。Gassendi火山口是否由于火成岩侵入或粘性松弛而形成?为了对此进行研究,分析探索了火山口的组成和形态尺寸。已发现所研究的区域包含各种矿物质,例如LCP(低钙辉石),HCP(高钙辉石),橄榄石,斜长石以及辉石和斜长石的混合物。为了区分相似的频谱图,使用M 3生成了“综合频带深度图”(IBD)和“频带深度参数”(BD)图。数据。形态图谱中已识别并标记了诸如中心峰群,孤立的丘陵,裂缝,边缘,墙壁阶地,墙壁塌陷等特征。我们还研究了所有形态特征的形态学方面。另一个撞击坑位于加森迪北部边缘,加森迪火山口显示LCP和橄榄石矿物的存在,以及广泛的塌陷,熔池和变形的北部边缘。我们已经将三个母马区域绘制到了火山口底部的南部,并使用CSFD技术估算了它们的年龄。加森迪火山口的当前外观主要是由于过去的火山活动,而不是撞击事件的结果。

更新日期:2021-03-21
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