《科学大讲堂 第247期》刘伊克 教授：祝融号四极化高频雷达揭示晚亚马逊纪火星水活动证据

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  • 题目: 祝融号四极化高频雷达揭示晚亚马逊纪火星水活动证据
  • 主讲人：刘伊克 教授 @ 中科院地质与地球物理研究所
  • 时间：2026年6月17日 10:30
  • 地点：理学院一楼1142报告厅

主讲人简介

Yike Liu (刘伊克) is a Professor at the Institute of Geology and Geophysics, Chinese Academy of Sciences (IGGCAS). He received his B.S. degree in Physics from Peking University and his Ph.D. degree from the Institute of Geophysics, Chinese Academy of Sciences. His long-term research focuses on petroleum and applied geophysics, with major interests in seismic imaging, seismic inversion, multiple attenuation, and multiple migration. In recent years, his research has expanded to radar exploration of the Martian shallow subsurface, characterization of Martian rock properties, and investigations of the history of water activity on Mars. In recognition of his outstanding contributions to multiple-wave imaging, he received the Reginald Fessenden Award from the Society of Exploration Geophysicists (SEG) in 2022. In 2019, his work on full-waveform inversion of multiples won the Best Poster Award at the SEG Annual Meeting. He is the first China-based researcher to receive both of these prestigious SEG honors.

讲座简介

Present-day Mars is a cold and arid planet, yet extensive evidence indicates that it was not always so. Determining when Mars lost its aqueous activity is one of the fundamental scientific questions for understanding the planet's long-term climatic evolution and geological history. The Zhurong rover successfully landed in the southern part of the Utopia Planitia basin and, for the first time on the Martian surface, deployed a high-frequency quad-polarization ground-penetrating radar system. Through systematic data processing, imaging, and inversion, our research team has obtained quad-polarization images of the shallow Martian subsurface with vertical resolution up to 5 cm, along with quantitative estimates of rock physical properties. These results not only reveal the fine-scale structure of the Martian near-subsurface but also provide an important new perspective on the planet's climatic evolution: significant aqueous activity may have persisted in the shallow subsurface during the late Amazonian, approximately 750 million years ago. This discovery extends the upper time limit for the presence of water on Mars by billions of years and provides new key evidence for reassessing the planet's late-stage climatic evolution, geological processes, and potential habitability.

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