金星的地幔对流、岩石圈演化和表面更新  

Mantle convection,lithosphere evolution and resurfacing of Venus

作　　者：黄金水[1,2,3] 相松 杨安 王永明[5] HUANG JinShui;XIANG Song;YANG An;WANG YongMing(School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence in Comparative Planetology,Hefei 230026,China;Mengcheng National Geophysical Observatory,University of Science and Technology of China,Hefei 230026,China;Key Laboratory of Marine Geology and Environment,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;Department of Geophysics,School of Earth Science,Yunnan University,Kunming 650500,China)

机构地区：[1]中国科学技术大学地球和空间科学学院,合肥230026 [2]中国科学院比较行星学卓越中心,合肥230026 [3]中国科学技术大学蒙城地球物理野外科学观测研究站,合肥230026 [4]中国科学院海洋研究所海洋地质与环境重点实验室,青岛266071 [5]云南大学地球科学学院地球物理系,昆明650500

出　　处：《地球物理学报》2021年第10期3503-3513,共11页Chinese Journal of Geophysics

基　　金：国家自然科学基金面上项目(42074105,41474082);中国科学院战略性先导科技专项(XDB41000000);中国科学院知识创新工程资助.

摘　　要：金星在大小、轨道半径等方面与地球非常接近,但现今的观测显示金星在大气、表面温度、重力与地形特征等方面与地球非常不同.对固体金星而言,最显著特征是有火山活动但没有活动的板块构造运动、表面平均大约500±200 Ma的年龄显示金星发生过全球性表面快速更新、重力与地形强相关.本文在简要介绍已有工作的基础上,主要介绍我们基于这些观测特征开展的金星动力学研究,包括现今地幔的对流模式、相变对表面更新的影响、地壳厚度、岩石圈演化与表面更新等研究工作和取得的初步认识.Venus is very similar to the Earth in size and orbit radius,but the current observations show that Venus is very different from the Earth in atmosphere,surface temperature and also in gravity and topographic features.For the solid part of the Venus,the most prominent characteristics include 1)there are some active volcanisms but no active plate tectonics,2)an average surface age of~500±200 Ma indicates that Venus has experienced rapid global resurfacing,and 3)the gravity and the topography are strongly correlated.In this paper,we first give a brief introduction of some previous works and then we focus on our recent studies on the dynamics of Venus that associated with these observational characteristics.The main contents of these studies include the present mantle convection mode of Venus,the effect of phase transition on Venusian resurfacing,the thickness of the Venusian crust,and the lithosphere evolution and resurfacing of Venus.The preliminary results and its implications are listed in the concluding remarks.

关 键 词：金星地幔对流 金星岩石圈演化 金星表面更新 灾难性表面更新 金星岩石圈拆沉 

分 类 号：P541[天文地球—构造地质学] P315[天文地球—地质学]