Divergent plate motion drives rapid exhumation of (ultra)high pressure rocks

doi:10.1016/j.epsl.2018.03.024

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Divergent plate motion drives rapid exhumation of (ultra)high pressure rocks
	Liao, Jie 1,2; Malusa, Marco G.3; Zhao, Liang 4; Baldwin, Suzanne L.5; Fitzgerald, Paul G.5; Gerya, Taras 2
刊名	EARTH AND PLANETARY SCIENCE LETTERS
	2018-06-01
卷号	491 页码:67-80
关键词	upper-plate divergent motion (U)HP rock exhumation mantle-wedge exhumation Western Alps eastern Papua New Guinea
ISSN号	0012-821X
DOI	10.1016/j.epsl.2018.03.024
文献子类	Article
英文摘要	Exhumation of (ultra)high pressure [(U)HP] rocks by upper-plate divergent motion above an unbroken slab, first proposed in the Western Alps, has never been tested by numerical methods. We present 2D thermo-mechanical models incorporating subduction of a thinned continental margin beneath either a continental or oceanic upper plate, followed by upper-plate divergent motion away from the lower plate. Results demonstrate how divergent plate motion may trigger rapid exhumation of large volumes of (U)HP rocks directly to the Earth's surface, without the need for significant overburden removal by erosion. Model exhumation paths are fully consistent with natural examples for a wide range of upper-plate divergence rates. Exhumation rates are systematically higher than the divergent rate imposed to the upper plate, and the modeled size of exhumed (U)HP domes is invariant for different rates of upper plate divergence. Major variations are instead predicted at depth for differing model scenarios, as larger amounts of divergent motion may allow mantle-wedge exhumation to shallow depth under the exhuming domes. The transient temperature increase, due to ascent of mantle-wedge material in the subduction channel, has a limited effect on exhumed continental (U)HP rocks already at the surface. We test two examples, the Cenozoic (U)HP terranes of the Western Alps (continental upper plate) and eastern Papua New Guinea (oceanic upper plate). The good fit between model predictions and the geologic record in these terranes encourages the application of these models globally to pre-Cenozoic (U)HP terranes where the geologic record of exhumation is only partly preserved. (C) 2018 Elsevier B.V. All rights reserved.
WOS关键词	PAPUA-NEW-GUINEA ; WESTERN ALPS ; CONTINENTAL SUBDUCTION ; WOODLARK RIFT ; DENTRECASTEAUX ISLANDS ; WAVE TOMOGRAPHY ; MANTLE WEDGE ; GNEISS DOMES ; CRUST ; EXTENSION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000432499200008
资助机构	Swiss National Science Foundation - Swiss-AlpArray SINERGIA project(CRSII2_154434/1) ; Swiss National Science Foundation - Swiss-AlpArray SINERGIA project(CRSII2_154434/1) ; US National Science Foundation(0208334 ; US National Science Foundation(0208334 ; Thonis endowment ; Thonis endowment ; 0709054) ; 0709054) ; Swiss National Science Foundation - Swiss-AlpArray SINERGIA project(CRSII2_154434/1) ; Swiss National Science Foundation - Swiss-AlpArray SINERGIA project(CRSII2_154434/1) ; US National Science Foundation(0208334 ; US National Science Foundation(0208334 ; Thonis endowment ; Thonis endowment ; 0709054) ; 0709054) ; Swiss National Science Foundation - Swiss-AlpArray SINERGIA project(CRSII2_154434/1) ; Swiss National Science Foundation - Swiss-AlpArray SINERGIA project(CRSII2_154434/1) ; US National Science Foundation(0208334 ; US National Science Foundation(0208334 ; Thonis endowment ; Thonis endowment ; 0709054) ; 0709054) ; Swiss National Science Foundation - Swiss-AlpArray SINERGIA project(CRSII2_154434/1) ; Swiss National Science Foundation - Swiss-AlpArray SINERGIA project(CRSII2_154434/1) ; US National Science Foundation(0208334 ; US National Science Foundation(0208334 ; Thonis endowment ; Thonis endowment ; 0709054) ; 0709054)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/88231]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Liao, Jie; Malusa, Marco G.
作者单位	1.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangzhou, Guangdong, Peoples R China 2.Swiss Fed Inst Technol, Inst Geophys, Geophys Fluid Dynam, Zurich, Switzerland 3.Univ Milano Bicocca, Dept Earth & Environm Sci, Milan, Italy 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 5.Syracuse Univ, Dept Earth Sci, Syracuse, NY USA
推荐引用方式 GB/T 7714	Liao, Jie,Malusa, Marco G.,Zhao, Liang,et al. Divergent plate motion drives rapid exhumation of (ultra)high pressure rocks[J]. EARTH AND PLANETARY SCIENCE LETTERS,2018,491:67-80.
APA	Liao, Jie,Malusa, Marco G.,Zhao, Liang,Baldwin, Suzanne L.,Fitzgerald, Paul G.,&Gerya, Taras.(2018).Divergent plate motion drives rapid exhumation of (ultra)high pressure rocks.EARTH AND PLANETARY SCIENCE LETTERS,491,67-80.
MLA	Liao, Jie,et al."Divergent plate motion drives rapid exhumation of (ultra)high pressure rocks".EARTH AND PLANETARY SCIENCE LETTERS 491(2018):67-80.