The strength of intraplate lithosphere

地质学 岩石圈 板内地震 脆性 地震学 扩散蠕变 位错蠕变 变形(气象学) 地球物理学 构造学 结壳 岩石圈挠曲 位错 材料科学 复合材料 海洋学 微观结构 冶金 晶界
作者
Nick Kusznir,R.G. Park
出处
期刊:Physics of the Earth and Planetary Interiors [Elsevier BV]
卷期号:36 (3-4): 224-235 被引量:35
标识
DOI:10.1016/0031-9201(84)90048-7
摘要

Abstract The deformation of intraplate lithosphere in response to laterally applied stress has been investigated using a mathematical model of the elastic, brittle and viscous response of the lithosphere. Fundamental to the model is the conservation of the horizontal force associated with the applied stress and the redistribution of stress within the lithosphere after stress release by ductile or brittle failure. Ductile deformation is assumed to be controlled by dislocation creep in quartz in the crust and by dislocation and Dorn law creep in olivine in the mantle. Brittle failure is predicted using Griffith theory. The redistribution of stress after brittle and ductile deformation results in large levels of stress in the middle and lower crust immediately above the elastic-ductile or brittle-ductile transition. Lithosphere deformation is controlled critically by the lithosphere thermal structure of which surface heat flow, q, is taken as a convenient indicator. For hotter lithosphere, stress release by ductile deformation in the middle and lower lithosphere is more extensive and rapidly leads to larger levels of stress in the upper lithosphere. For sufficiently large levels of applied stress, or sufficiently hot lithosphere, complete failure (Whole Lithosphere Failure of the lithosphere occurs by ductile and brittle deformation resulting in geologically significant strains. Critical levels of applied stress required to produce Whole Lithosphere Failure have been computed as a function of the lithosphere surface heat flow. The predicted strength of the lithosphere has been compared with expected levels of intraplate stress arising from plate boundary forces and isostatically compensated loads. The model predicts significant extensional intraplate deformation in regions of moderate heat flow with q > 60 m W m−2. For compressional deformation, however, a hotter lithosphere is required with q > c. 75 m W m−2. The model predictions are in general agreement with the comparatively widespread occurrence of extensional intraplate deformation and the restricted occurrence of compressional deformation. The model has also been used to investigate the relationship between the depth of the brittle-ductile transition and lithosphere temperature structure. The brittle-ductile transition depth is shown to become shallower with increasing heat flow, in good agreement with seismic evidence.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
Akim应助惊梦采纳,获得10
刚刚
six完成签到,获得积分10
刚刚
如意冰棍完成签到 ,获得积分10
刚刚
晓磊发布了新的文献求助10
刚刚
啊TiP完成签到,获得积分10
刚刚
bkagyin应助白好闻采纳,获得10
1秒前
善学以致用应助Chenyan775199采纳,获得10
1秒前
zhao完成签到,获得积分10
1秒前
恶恶么v完成签到,获得积分10
2秒前
Aurora完成签到 ,获得积分10
2秒前
2秒前
传奇3应助可爱半双采纳,获得10
2秒前
2秒前
看文献发布了新的文献求助10
2秒前
3秒前
3秒前
dinglingling完成签到 ,获得积分10
3秒前
3秒前
Dreamer0422完成签到,获得积分10
3秒前
彳亍完成签到,获得积分10
4秒前
4秒前
4秒前
彭于晏完成签到,获得积分10
4秒前
wangfeng007发布了新的文献求助10
4秒前
aigj完成签到 ,获得积分10
4秒前
zha完成签到,获得积分10
4秒前
上官若男应助Pyrene采纳,获得10
5秒前
大力丹琴完成签到,获得积分10
5秒前
sddq完成签到,获得积分10
5秒前
红绿蓝完成签到 ,获得积分10
5秒前
agnehc发布了新的文献求助10
5秒前
圆咕噜完成签到,获得积分10
5秒前
NexusExplorer应助单薄安梦采纳,获得10
5秒前
今后应助ynn采纳,获得10
5秒前
充电宝应助周周采纳,获得10
6秒前
7秒前
Zhihu完成签到,获得积分10
8秒前
8秒前
zanedou完成签到,获得积分10
9秒前
yjz发布了新的文献求助10
9秒前
高分求助中
Picture Books with Same-sex Parented Families: Unintentional Censorship 1000
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3977026
求助须知:如何正确求助?哪些是违规求助? 3521252
关于积分的说明 11206612
捐赠科研通 3257986
什么是DOI,文献DOI怎么找? 1798942
邀请新用户注册赠送积分活动 878029
科研通“疑难数据库(出版商)”最低求助积分说明 806723