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Volcanic history in the Smythii basin based on SELENE radar observation.
Sci Rep 2019; 9(1):14502SR

Abstract

Elucidation of the subsurface structure in the Smythii basin on the moon is important for understanding lunar volcanic history. Two lava units (Units 1 and 2) cover this basin. The spatial subsurface structure below Unit 2 is unknown. We used SELENE/Lunar Radar Sounder data to identify four subsurface boundaries at 130, 190, 300, and 420 m depths. The radar is reflected at the paleo-regolith layer sandwiched among lava flows, which is supported by a simple radar reflection/transmission model. The spatial distribution of subsurface boundaries demonstrates the deposition of Unit 2 on the subsidence in Unit 1. A simple loading model explained the maximum depth of subsidence (~500 m) and indicated that lithospheric thickness in the Smythii basin was ~24 km at 3.95 Gya. The estimated growth rate of the lithosphere was ~60 km/Ga during 3.95 to 3.07 Gya. After the formation of the Smythii basin at ~4.11 Gya, Unit 1 and Unit 2 deposited with eruption rates of ~8.4 × 10-4 km3/yr by 3.95 Gya and ~7.5 × 10-6 km3/yr by 3.07 Gya respectively. The timing of decline in volcanic activity in the Smythii basin differs from that for the lunar nearside maria, indicating the diversity of volcanism in various lunar areas.

Authors+Show Affiliations

National Institute of Technology, Tsuruoka College, 104 Sawada, Inooka, Tsuruoka, Yamagata, 997-8511, Japan. ishiyama.ken@tsuruoka-nct.ac.jp.Department of Geophysics, Graduate School of Science, Tohoku University, 6-3 Aramaki Aoba, Aoba-ku, Sendai, Miyagi, 980-8578, Japan.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31601828

Citation

Ishiyama, Ken, and Atsushi Kumamoto. "Volcanic History in the Smythii Basin Based On SELENE Radar Observation." Scientific Reports, vol. 9, no. 1, 2019, p. 14502.
Ishiyama K, Kumamoto A. Volcanic history in the Smythii basin based on SELENE radar observation. Sci Rep. 2019;9(1):14502.
Ishiyama, K., & Kumamoto, A. (2019). Volcanic history in the Smythii basin based on SELENE radar observation. Scientific Reports, 9(1), p. 14502. doi:10.1038/s41598-019-50296-9.
Ishiyama K, Kumamoto A. Volcanic History in the Smythii Basin Based On SELENE Radar Observation. Sci Rep. 2019 Oct 10;9(1):14502. PubMed PMID: 31601828.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Volcanic history in the Smythii basin based on SELENE radar observation. AU - Ishiyama,Ken, AU - Kumamoto,Atsushi, Y1 - 2019/10/10/ PY - 2018/07/18/received PY - 2019/09/05/accepted PY - 2019/10/12/entrez PY - 2019/10/12/pubmed PY - 2019/10/12/medline SP - 14502 EP - 14502 JF - Scientific reports JO - Sci Rep VL - 9 IS - 1 N2 - Elucidation of the subsurface structure in the Smythii basin on the moon is important for understanding lunar volcanic history. Two lava units (Units 1 and 2) cover this basin. The spatial subsurface structure below Unit 2 is unknown. We used SELENE/Lunar Radar Sounder data to identify four subsurface boundaries at 130, 190, 300, and 420 m depths. The radar is reflected at the paleo-regolith layer sandwiched among lava flows, which is supported by a simple radar reflection/transmission model. The spatial distribution of subsurface boundaries demonstrates the deposition of Unit 2 on the subsidence in Unit 1. A simple loading model explained the maximum depth of subsidence (~500 m) and indicated that lithospheric thickness in the Smythii basin was ~24 km at 3.95 Gya. The estimated growth rate of the lithosphere was ~60 km/Ga during 3.95 to 3.07 Gya. After the formation of the Smythii basin at ~4.11 Gya, Unit 1 and Unit 2 deposited with eruption rates of ~8.4 × 10-4 km3/yr by 3.95 Gya and ~7.5 × 10-6 km3/yr by 3.07 Gya respectively. The timing of decline in volcanic activity in the Smythii basin differs from that for the lunar nearside maria, indicating the diversity of volcanism in various lunar areas. SN - 2045-2322 UR - https://www.unboundmedicine.com/medline/citation/31601828/Volcanic_history_in_the_Smythii_basin_based_on_SELENE_radar_observation L2 - http://dx.doi.org/10.1038/s41598-019-50296-9 DB - PRIME DP - Unbound Medicine ER -
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