Chaotic Flow Patterns from a Deep Plutonic Environment: a Case Study on Natural Magma Mixing
Chaotic Flow Patterns from a Deep Plutonic Environment: a Case Study on Natural Magma Mixing
复制标题
深成环境中的混沌流模式:自然岩浆混合案例研究
DOI:
10.1007/s00024-014-0940-6
复制
发表时间:
2015
影响因子:
2
通讯作者:
De Campos C.P.
中科院分区:
文献类型:
--
作者:
De Campos C.P.
This work focuses on the mixing between basalt and granite in a deep plutonic environment. The description of mixing patterns and measurements of fractal dimensions, and the evaluation of geochemical data from a Cambro–Ordovician granitic pluton are summarized and discussed. Different morphologic domains within the pluton reveal concentric fragmented and/or folded layers of granite in a gabbro/granite mixed matrix. This stands in contrast to two predominantly regular gabbroic regions. These regular regions are separated by tightly stretched filament areas, in which mixing is enhanced. Sharp and gradational contacts between granitic and gabbroic domains depict the interplay among frozen flows (mingling) and convection-enhanced diffusion processes (mixing). Measurements of fractal dimensions at different scales and analysis of normalized concentration variance for major elements point towards magma mixing: the compositional variability and flow patterns of the studied pluton have been greatly controlled by a natural chaotic mixing process between a granitic and a basaltic end-member. During the mixing process, coeval fractional crystallization no doubt contributed to increasing the complexity of the system. However, since flow, and therefore mixing, stops with temperature decrease, flow patterns must have retained the predominant morphology and composition of the moment at which both contrasting magmas came together and froze. Flow patterns have been preserved. With further temperature decrease, fractional crystallization took over and hybrid rocks were generated from the fractionation of magmas previously mixed in different proportions.
登录
查看更多内容
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
D. Morgavi;D. Perugini;C. P. Campos;Werner Ertl;Y. Lavallée;L. Morgan;Donald Bruce Dingwell
通讯作者:
Donald Bruce Dingwell
DOI:
--
发表时间:
1996
影响因子:
1.2
作者:
J. Flinders;J. Clemens
通讯作者:
J. Clemens
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
D. Perugini;G. Poli;R. Mazzuoli
通讯作者:
R. Mazzuoli
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
J. Mendes;C. P. Campos
通讯作者:
C. P. Campos
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
J. Mendes;C. M. Wiedemann;I. McReath
通讯作者:
I. McReath