Individualization of a forearc basin during the active margin evolution: Hikurangi subduction margin, New Zealand

被引:15
|
作者
Buret, C
Chanier, F
Ferriere, J
Proust, JN
机构
关键词
forearc basin; New Zealand; active margin; sedimentation; subsidence; unconformity; accretionary prism;
D O I
10.1016/S1251-8050(97)89463-3
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Sedimentological studies from the Hikurangi forearc domain (New Zealand) outlined a major unconformity at the Miocene-Pliocene boundary, around 6-4 My ago. This discontinuity marks the transition between two main periods in the evolution of the active margin during the Neogene. The first one is Miocene (about 18-5 My)) and is characterized by a general deepening in water depths, linked to a major subsidence of the whole margin. The second period is Pliocene-Pleistocene (about 4-0 My) and exhibits the formation of a real forearc basin. This basin is an elongated narrow depression between the frontal are (landward) and the Coastal Ranges (seaward) corresponding to the highest ridge of the accretionary wedge.
引用
收藏
页码:615 / 621
页数:7
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