The lithosphere－asthenosphere： Italy and surroundings  

作　　者：GiulianoF.Panza AntonellaPontevivo GiordanoChimera RenetaRaykova AbdelkrimAoudia 

机构地区：[1]DepartmentofEarthSciences,UniversityofTrieste,ViaWeiss4,34127-Trieste,Italy [2]TheAbdusSalamInternationalCentreforTheoreticalPhysics.SANDGroup,Tricste,Italy

出　　处：《Episodes》2003年第3期169-174,共6页地质幕（英文版）

摘　　要：The velocity-depth distribution of the lithosphere-asthenosphere in the Italian region and surroundings is imaged, with a lateral resolution of about 100 km, by sur-face wave velocity tomography and non-linear inversion.Maps of the Moho depth, of the thickness of the lithos-phere and of the shear-wave velocities, down to depths of 200 km and more, are constructed. A mantle wedge, iden-tified in the uppermost mantle along the Apennines and the Calabrian Arc, underlies the prmctpat recent votca-noes, and partial melting can be relevant in this part of the uppermost mantle. In Calabria, a lithospheric dou-bling is seen, in connection with the subduction of the Ionian lithosphere. The asthenosphere is shallow in the Southern Tyrrhenian Sea. High velocity bodies, cutting the asthenosphere, outline the Adria-lonian subduction in the Tyrrhenian Sea and the deep-reaching lithospheric root in the Western Alps. Less deep lithospheric roots are seen in the Central Apennines. The lithosphere-asthenos-phere properties delineate a differentiation between the northern and the southern sectors of the Adriatic Sea,likely attesting the fragmentation of Adria.

关 键 词：岩石圈 岩流圈 意大利 环境 地质学 表面波动速率 非线性倒置 

分 类 号：P565.46[天文地球—构造地质学] P31[天文地球—地质学]