DOI: 10.1029/2017JF004369
Scopus记录号: 2-s2.0-85052451398
论文题名: Magmatic Landscape Construction
作者: Karlstrom L. ; Richardson P.W. ; O'Hara D. ; Ebmeier S.K.
刊名: Journal of Geophysical Research: Earth Surface
ISSN: 21699003
出版年: 2018
卷: 123, 期: 8 起始页码: 1710
结束页码: 1730
语种: 英语
英文关键词: preservation of volcanic deposits
; tectonic geomorphology
; volcanic geomorphology
; volcanic landforms
英文摘要: Magmatism is an important driver of landscape adjustment over ∼10% of Earth's land surface, producing 103- to 106-km2 terrains that often persistently resurface with magma for 1–10 s of Myr. Construction of topography by magmatic intrusions and eruptions approaches or exceeds tectonic uplift rates in these settings, defining regimes of landscape evolution by the degree to which such magmatic construction outpaces erosion. We compile data that span the complete range of magmatism, from laccoliths, forced folds, and InSAR-detected active intrusions, to explosive and effusive eruption deposits, cinder cones, stratovolcanoes, and calderas. Distributions of magmatic landforms represent topographic perturbations that span >10 orders of magnitude in planform areas and >6 orders of magnitude in relief, varying strongly with the style of magmatism. We show that, independent of erodibility or climate considerations, observed magmatic landform geometry implies a wide range of potential for erosion, due to trade-offs between slope and drainage area in common erosion laws. Because the occurrence rate of magmatic events varies systematically with the volume of material emplaced, only a restricted class of magmatic processes is likely to directly compete with erosion to shape topography. Outside of this range, magmatism either is insignificant on landscape scales or overwhelms preexisting topography and acts to reset the landscape. The landform data compiled here provide a basis for disentangling competing processes that build and erode topography in volcanic provinces, reconstructing timing and volumes of volcanism in the geologic record, and assessing mechanical connections between climate and magmatism. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113397
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth Sciences, University of Oregon, Eugene, OR, United States; School of Earth and Environment, University of Leeds, Leeds, United Kingdom
Recommended Citation:
Karlstrom L.,Richardson P.W.,O'Hara D.,et al. Magmatic Landscape Construction[J]. Journal of Geophysical Research: Earth Surface,2018-01-01,123(8)