Formation of dome-in-dome structures: Results from experimental studies and comparison with natural examples
Formation of dome-in-dome structures: Results from experimental studies and comparison with natural examples
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圆顶结构的形成:实验研究结果以及与自然实例的比较
DOI:
10.1016/j.jsg.2018.11.008
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发表时间:
2019
影响因子:
3.1
通讯作者:
Hattingen
中科院分区:
文献类型:
--
作者:
Zulauf;Zulauf;Thiessen;Hattingen
Dome-in-dome structures are frequent in salt provinces and in high-grade rocks of orogens. Their origin is only poorly understood. In the present study we have modelled dome-in-dome structures, which result from constrictional (radial) in-plane shortening of a competent layer embedded in a rising less competent matrix. Both the layer and the matrix consist of non-linear viscous plasticine, which display a viscosity contrast of 5. The deforming competent layer is characterized by (1) a striking downward drag along the margins, (2) a sample-scale first-order dome, and (3) numerous second-order domes and basins straddling the first-order dome. With increasing layer thickness and strain, the amplitude,A, arc-length,L, and wavelength,λ, of the second-order domes and basins increase. However, their growth rate is significantly smaller than that of non-rising domes and basins, which result from a bidirectional flow. This restricted growth of rising domes and basins is attributed to the simultaneous growth of the first-order dome, and explains, why hair-pin type folds – typical for non-rising domes and basins - are lacking, even at higher finite strain.Similar dome-in-dome structures like those produced in the present study have been described from deeper levels of salt and gneiss domes or from foliation triple points of interfering diapirs.
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DOI:
--
发表时间:
1968
期刊:
影响因子:
--
作者:
D. H. Kupfer
通讯作者:
D. H. Kupfer
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
C. Jackson;M. Jackson;M. Hudec;C. Rodriguez
通讯作者:
C. Rodriguez
DOI:
--
发表时间:
1959
期刊:
影响因子:
--
作者:
W. Muehlberger
通讯作者:
W. Muehlberger
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
B. Escher;P. Kuenen
通讯作者:
P. Kuenen
DOI:
--
发表时间:
1952
期刊:
Quarterly Journal of the Geological Society of London
影响因子:
--
作者:
G. M. Lees
通讯作者:
G. M. Lees