气候变化领域集成服务门户(CCPortal): The Survival of Mafic Magmatic Enclaves and the Timing of Magma Recharge

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DOI	10.1029/2020GL087186
	The Survival of Mafic Magmatic Enclaves and the Timing of Magma Recharge
	Ruprecht P.; Simon A.C.; Fiege A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:14
英文摘要	Many intermediate to felsic intrusive and extrusive rocks contain mafic magmatic enclaves that are evidence for magma recharge and mixing. Whether enclaves represent records of prolonged mixing or syn-eruptive recharge depends on their preservation potential in their intermediate to felsic host magmas. We present a model for enclave consumption where an initial stage of diffusive equilibration loosens the crystal framework in the enclave followed by advective erosion and disaggregation of the loose crystal layer. Using experimental data to constrain the propagation rate of the loosening front leads to enclave “erosion” rates of 10−5–10−8 cm/s for subvolcanic magma systems. These rates suggest that under some circumstances, enclave records are restricted to syn-eruptive processes, while in most cases, enclave populations represent the recharge history over centuries to millennia. On these timescales, mafic magmatic enclaves may be unique recorders that can be compared to societal and written records of volcano activity. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Crystals; Erosion; Timing circuits; Crystal layer; Diffusive equilibration; Disaggregation; Eruptive process; Magma recharge; Preservation potential; Propagation rate; Volcano activity; Mixing; crystal structure; diffusion; erosion; experimental study; igneous intrusion; magma; recharge; volcanic eruption; volcanism
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170110
作者单位	Department of Geological Sciences and Engineering, University of Nevada, Reno, NV, United States; Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, United States; Department of Earth and Planetary Sciences, American Museum of Natural History, New York, NY, United States
推荐引用方式 GB/T 7714	Ruprecht P.,Simon A.C.,Fiege A.. The Survival of Mafic Magmatic Enclaves and the Timing of Magma Recharge[J],2020,47(14).
APA	Ruprecht P.,Simon A.C.,&Fiege A..(2020).The Survival of Mafic Magmatic Enclaves and the Timing of Magma Recharge.Geophysical Research Letters,47(14).
MLA	Ruprecht P.,et al."The Survival of Mafic Magmatic Enclaves and the Timing of Magma Recharge".Geophysical Research Letters 47.14(2020).