DOI: 10.1038/NGEO2982
论文题名: A reverse energy cascade for crustal magma transport
作者: Karlstrom L. ; Paterson S.R. ; Jellinek A.M.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期: 8 起始页码: 604
结束页码: 608
语种: 英语
Scopus关键词: deformation mechanism
; heating
; magma
; magmatism
; mantle
; numerical method
; size distribution
; solidification
; volcanic eruption
; volcanism
; North American Cordillera
英文摘要: Direct constraints on the ascent, storage and eruption of mantle melts come primarily from exhumed, long-frozen intrusions. These structures, relics of a dynamic magma transport network, encode how Earth's crust grows and differentiates over time. Furthermore, they connect mantle melting to an evolving distribution of surface volcanism. Disentangling magma transport processes from the plutonic record is consequently a seminal but unsolved problem. Here we use field data analyses, scaling theory and numerical simulations to show that the size distribution of intrusions preserved as plutonic complexes in the North American Cordillera suggests a transition in the mechanical response of crustal rocks to protracted episodes of magmatism. Intrusion sizes larger than about 100m follow a power-law scaling expected if energy delivered from the mantle to open very thin dykes and sills is transferred to intrusions of increasing size. Merging, assimilation and mixing of small intrusions into larger ones occurs until irreversible deformation and solidification dissipate available energy. Mantle magma supply over tens to hundreds of thousands of years will trigger this regime, a type of reverse energy cascade, depending on the influx rate and efficiency of crustal heating by intrusions. Identifying regimes of magma transport provides a framework for inferring subsurface magmatic processes from surface patterns of volcanism, information preservation in the plutonic record, and related effects including climate. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105730
Appears in Collections: 气候减缓与适应 科学计划与规划
There are no files associated with this item.
作者单位: Department of Earth Sciences, University of Oregon, Eugene, OR, United States; Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States; Department of Earth, Ocean and Atmospheric Sciences, University of British ColumbiaBC, Canada
Recommended Citation:
Karlstrom L.,Paterson S.R.,Jellinek A.M.. A reverse energy cascade for crustal magma transport[J]. Nature Geoscience,2017-01-01,10(8)