Marine Forearc Extension in the Hikurangi Margin: New Insights From High‐Resolution 3‐D Seismic Data
Marine Forearc Extension in the Hikurangi Margin: New Insights From High‐Resolution 3‐D Seismic Data
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Hikurangi 边缘的海洋弧前延伸:高分辨率 3D 地震数据的新见解
DOI:
10.1029/2017tc004906
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发表时间:
2018
期刊:
影响因子:
4.2
通讯作者:
Krastel
中科院分区:
文献类型:
--
作者:
Böttner;Geersen;Crutchley;Mountjoy;Krastel
Upper‐plate normal faults are a widespread structural element in erosive plate margins. Increasing coverage of marine geophysical data has proven that similar features also exist in accretionary margins where horizontal compression usually results in folding and thrust faulting. There is a general lack of understanding of the role and importance of normal faulting for the structural and tectonic evolution of accretionary margins. Here we use high‐resolution 2‐D and 3‐D seismic reflection data and derived seismic attributes to map and analyze upper‐plate normal faulting in the marine forearc of the accretionary Hikurangi margin, New Zealand. We document extension of the marine forearc over a wide area along the upper continental slope. The seismically imaged normal faults show low vertical displacements, high dip angles, a preference for landward dip, and often en echelon patterns. We evaluate different processes, which may cause the observed extension, including (1) stress change during the earthquake cycle, (2) regional or local uplift and decoupling of shallow strata from compression at depth, and (3) rotation of crustal blocks and resulting differential stresses at the block boundaries. The results suggest that normal faults play an important role in the structural and tectonic evolution of accretionary margins, including the northern Hikurangi forearc.
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DOI:
10.1007/978-3-319-20979-1_42
发表时间:
2016
期刊:
影响因子:
--
作者:
Micallef;Mountjoy;Krastel;Crutchley
通讯作者:
Crutchley
DOI:
10.1098/rsta.1987.0009
发表时间:
1987
期刊:
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
影响因子:
--
作者:
R. Walcott
通讯作者:
R. Walcott
影响因子:
2.2
作者:
S. Beanland;J. Haines
通讯作者:
J. Haines
DOI:
--
发表时间:
1966
期刊:
影响因子:
--
作者:
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通讯作者:
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DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
R. J. Fraser
通讯作者:
R. J. Fraser