Benthic foraminiferal distribution and sedimentary structures suggest tectonic erosion at the Costa Rica convergent plate margin

被引：9

作者：

Meschede, M ^{[1
]}

Weiss, R

Schmiedl, G

Hemleben, C

机构：

[1] Univ Greifswald, Inst Geol Sci, D-17487 Greifswald, Germany

[2] Univ Tubingen, Inst Geol, D-72076 Tubingen, Germany

[3] Univ Leipzig, Inst Geol & Geophys, D-04103 Leipzig, Germany

来源：

TERRA NOVA | 2002年 / 14卷 / 05期

关键词：

D O I：

10.1046/j.1365-3121.2002.00439.x

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Distribution patterns of benthic foraminiferal faunas from ODP Leg 170 Sites 1041 and 1042 show that the Costa Rican convergent margin subsided from coastal to abyssal depth from Middle Miocene to Present. This favours the model of a margin undergoing active subduction erosion. We propose that subduction erosion leads to the removal of material from the base of the forearc wedge and, as a consequence, to progressive subsidence of the forearc. A mean subsidence rate is estimated to be approximately 0.4 mm yr(-1).

引用

页码：388 / 396

页数：9

共 12 条

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