Crustal structure of western Hispaniola (Haiti) from a teleseismic receiver function study

被引：27

作者：

Corbeau, J. ^{[1
,2
]}

Rolandone, F. ^{[1
]}

Leroy, S. ^{[1
]}

Guerrier, K. ^{[3
]}

Keir, D. ^{[4
,5
]}

Stuart, G. ^{[6
]}

Clouard, V. ^{[2
]}

Gallacher, R. ^{[4
]}

Ulysse, S. ^{[3
]}

Boisson, D. ^{[3
]}

Momplaisir, R. Bien-aime ^{[3
]}

Saint Preux, F. ^{[7
]}

Prepetit, C. ^{[7
]}

Saurel, J. -M. ^{[2
]}

de Lepinay, B. Mercier ^{[8
]}

Meyer, B. ^{[1
]}

机构：

[1] Univ Paris 06, Sorbonne Univ, CNRS, UPMC,Inst Sci Terre Paris ISTeP, 4 Pl Jussieu, F-75005 Paris, France

[2] Sorbonne Paris Cite, CNRS, UMR 7154, IPGP,OVSM, Paris, France

[3] Univ Etat Haiti, Fac Sci, URGeo, Port Au Prince, Haiti

[4] Univ Southampton, Natl Oceanog Ctr Southampton, Ocean & Earth Sci, Southampton SO14 3ZH, Hants, England

[5] Univ Florence, Dipartimento Sci Terra, I-50121 Florence, Italy

[6] Univ Leeds, Inst Geophys & Tecton, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England

[7] Unite Tech Sismol, Bur Mines & Energie, Port Au Prince, Haiti

[8] Univ Cote Dazur, CNRS, IRD, OCA,Geoazur, Valbonne, France

来源：

TECTONOPHYSICS | 2017年 / 709卷

基金：

英国自然环境研究理事会;

关键词：

Receivers function; Haiti; Crustal structure; CARIBBEAN PLATE BOUNDARY; TECTONIC EVOLUTION; ISLAND-ARC; TRANSPRESSION; SEGMENTATION; NEOGENE; EXAMPLE; BENEATH; DECONVOLUTION; DEFORMATION;

D O I：

10.1016/j.tecto.2017.04.029

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Haiti, located at the northern Caribbean plate boundary, records a geological history of terrane accretion from Cretaceous island arc formations to the Eocene to Recent oblique collision with the Bahamas platform. Little is presently known about the underlying crustal structure of the island. We analyze P-waveforms arriving at 27 temporary broadband seismic stations deployed over a distance of 200 km across the major terrane boundaries in Haiti to determine the crustal structure of western Hispaniola. We compute teleseismic receiver functions using the Extended-Time Multi-Taper method and determine crustal thickness and bulk composition (V-p/V-s) using the H-kappa stacking method. Three distinctive and fault-bounded crustal domains, defined by their characteristic Moho depth distributions and bulk crustal V-p/V-s, are imaged across Haiti. We relate these domains to three crustal terranes that have been accreted along the plate boundary during the northeastwards displacement of the Caribbean plate and are presently being deformed in a localized fold and thrust belt. In the northern domain, made up of volcanic arc facies, the crust has a thickness of similar to 23 km and Vp/Vs of 1.75 +/- 0.1 typical of average continental crust. The crust in the southern domain is part of the Caribbean Large Igneous Province (Caribbean LIP), and is similar to 22 km thick with Vp/Vs of 1.80 +/- 0.03 consistent with plume-related rocks of late Cretaceous age. Significantly thicker, the crust in central Haiti has values of Moho depths averaging similar to 41 km and with Vp/Vs of 1.80 +/- 0.05. We propose that the central domain is likely constructed of an island arc upper crust with fragments of dense material originating from mafic lavas or LIP material. We produce a crustal profile along a N-S transect across Haiti accounting for the surface geology, shallow structural history, and new seismological constraints provided by variations of crustal thickness and bulk composition. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：9 / 19

页数：11

共 71 条

[1] SOURCE SCALING OF EARTHQUAKES IN THE SHUMAGIN REGION, ALASKA - TIME-DOMAIN INVERSIONS OF REGIONAL WAVE-FORMS [J].