Crustal structure of the Lesser Antilles arc estimated from receiver functions

被引：0

作者：

Arnaiz-Rodriguez, Mariano S. ^{[1
,2
,3
]}

Schmitz, Michael ^{[1
,4
]}

Audemard, Franck ^{[4
,5
]}

机构：

[1] Cent Univ Venezuela, Fac Ingn, Escuela Geol Minas & Geofis, Dept Geofis, Ciudad Univ Caracas,Av Los Ilustres, Caracas, DC, Venezuela

[2] China Univ Petr, State Key Lab Petr Resource & Prospecting, Beijing, Peoples R China

[3] China Univ Petr, Unconvent Nat Gas Inst, Beijing, Peoples R China

[4] Fdn Venezolana Invest Sismol, Av Guaicaipuro Calle Tiuna, Caracas, DC, Venezuela

[5] Cent Univ Venezuela, Fac Ingn, Escuela Geol Minas & Geofis, Dept Geol, Ciudad Univ Caracas,Av Los Ilustres, Caracas, DC, Venezuela

来源：

REVISTA MEXICANA DE CIENCIAS GEOLOGICAS | 2016年 / 33卷 / 03期

关键词：

Lesser Antilles; receiver functions; crustal thickness; Poisson's ratio; TELESEISMIC BODY-WAVES; UPPER-MANTLE; ISLAND-ARC; BENEATH; EVOLUTION; RIDGE; ZONE;

D O I：

暂无

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

By applying receiver functions technique we studied the crustal thickness and mechanical properties of the Lesser Antilles Arc. We gathered teleseismic data recorded from broadband stations deployed along the arc by different networks. The analysis of P-to-S conversion and crustal reverberations allowed us to estimate the Moho depth and the average crustal Vp/Vs ratio under nine stations. The results were corroborated with forward gravimetric modeling of the long wavelength component of the Complete Bouguer Anomaly along the structure. The Moho depth ranges between 22 and 32.4 km. The distribution of thick and thin crust is closely related to variations of the convergence rate of the subducted lithosphere at the Tiburen fault system. Poisson's ratio ranges between 0.266 (Vp/Vs = 1.777) and 0.3 (Vp/Vs = 1.870). Higher values are consistent with a Mesozoic basement, related to the Greater Antilles Arc, found in the northern section of the Lesser Antilles Arc.

引用

页码：286 / 296

页数：11