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Amazonian Volcanism in the Terra Sirenum region, Mars

Presentation #217.01 in the session Mars’ and Martian Moons’ Surface Properties and Composition (Oral Presentation)

Published onOct 23, 2023
Amazonian Volcanism in the Terra Sirenum region, Mars

Conical-shaped cones are geological features found on Mars, with various morphologies and sizes. The source of these cones is still in debate, but understanding their origin helps in comprehending Mars’s history. This study investigates a large field of pitted cones on the floor of an unnamed crater in the Terra Sirenum region. The morphological map of the unnamed crater includes 61 cones, three major faults forming graben across the crater, and at least five different geological units on the floor. The morphological characteristics of the cones are divided into two major groups: domical cones and pitted cones. The domical cones are well preserved with some degradation of fanks due to small impact craters, while the pitted cone exhibits sharp summit depression and faded rim in its flank due to flow-like features. The CSFD for Unit 1 and the Crater suggest ages of ~1.12 Ga and ~1.09 Ga, respectively (mid-Amazonian epoch). The cone formed post to ~1.12 Ga at this location on Mars. The study found no CRISM targeted data over the cones due to limited coverage. Spectral analysis of the crater indicates the presence of kaolinite, low-calcium, and high-calcium pyroxene minerals potentially refers to an igneous volcanism, though the involvement of water cannot be denied. The analysis is ongoing to understand the origin and source of cones in the Terra Sernium region.

Acknowledgement: The authors wish to acknowledge the HiRISE, CTX, MOLA and CRISM teams. S. Patel, Harish and M. R. El-Maarry acknowledge support for this work through an internal grant (8474000336-KU-SPSC).

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