Early Martian tectonic evolution: A study through geological and geophysical perspectives

早期火星构造演化：地质和地球物理视角的研究

• 批准号: 18F18312
• 负责人: 河合 研志
• 金额: $ 0.96万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2018
• 资助国家: 日本
• 起止时间: 2018-11-09 至 2020-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18F18312/
• 关键词: Impact behavior; Mars tectonics; Heat loss; Wrinkle ridge; Hesperian Compression; Global Compression; Buffer Crater Count; Age estimation; Mars; Noachian; Tectonics; Thermal history; Mantle Convection; Mapping

Our research is themed to understand Martian heat loss mechanism.We mimicked Hellas size giant impact, using iSALE-3D shock physics code and executed impact simulations and used the results to a time-dependent thermal convection of a fluid with an infinite Prandtl number and a temperature-dependent viscosity under the Boussinesq approximation in a cylinder.Observed results indicate that the generation of thermal gradient, resembling plume and are significant in terms of the morphological observations, in and around the Hellas region.We also estimated the age of the wrinkle ridges of Mars on a global scale and we observed a global compression in Hesperian time (Ruj and Kawai, submitted to Icarus, under review).Research on MoonIn order to understand the mantle evolution of the Moon, we are working on the landing site of the Chang’E 4 landing site (Von Karman crater). We have prepared a geological map (taking morphology and mineralogy into count) of the landing site region, and now we are working on the timing and type of volcanic material found in and around the landing site.

我们的研究主题是了解火星热损失机制。我们模拟了希腊大小的巨型撞击，使用iSALE-3D激波物理程序，并执行了撞击模拟，并将结果用于具有无限普朗特数和温度依赖粘度的流体在圆柱中的Boussinesq近似下的随时间变化的热对流。观察结果表明，热梯度的产生，我们还估计了火星褶皱脊在全球范围内的年龄，并观察到了西方时间的全球压缩（Ruj和Kawai，提交给Icarus，正在审查中）。月球研究为了了解月球的地幔演化，我们正在嫦娥四号着陆点的着陆点（冯卡门陨石坑）工作。我们已经准备了着陆点地区的地质图（将形态学和矿物学考虑在内），现在我们正在研究着陆点及其周围发现的火山物质的时间和类型。

项目成果

Timings of early crustal activity in southern highlands of Mars: Periods of crustal stretching and shortening

火星南部高地早期地壳活动的时间：地壳拉伸和缩短的时期

• 发表时间: 2019
• 期刊: Geoscience Frontiers
• 影响因子: 8.9
• 作者: Ruj;T.;Komatsu;G.;Pasckert;J.H.;and Dohm;J.M.
• 通讯作者: J.M.

UNIVERSITA DEGLI STUDI “G. dANNUNZIO”(イタリア)

“G. dANNUNZIO”大学（意大利）

Sun Yat-Sen University(中国)

中山大学（中国）

The Goshogake mud volcano field, Tohoku, northern Japan: An acidic, high-temperature system related to magmatic volcanism

日本北部东北部的五所岳泥火山田：与岩浆火山作用有关的酸性高温系统

• DOI: 10.1016/j.geomorph.2018.12.035
• 发表时间: 2019
• 期刊: Geomorphology
• 影响因子: 3.9
• 作者: Komatsu;G.;R. Ishimaru;N. Miyake;K. Kawai;M. Kobayashi;H. Sakuma;and T. Matsui
• 通讯作者: and T. Matsui