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通过在迪纳拉山脉和潘诺尼亚盆地西南交界带进行被动源地震实验,确定了地壳结构和波速不连续面。实验目的是确定亚得里亚海微板块与作为欧洲板块一部分的潘诺尼亚地块的关系。大部分流动台站沿着Alp07剖面(主动源ALP 2002项目的一部分)布设在克罗地亚。该剖面从伊斯特拉半岛到德拉瓦河沿线呈西西南-东东南向延伸约300km。利用P波接收函数方法分析测线上13个临时地震台站的远震记录。Alp07剖面得到了两种特征接收函数(RF),分属于迪纳拉和潘诺尼亚地壳,交界带则包含两种类型。迪纳拉型地壳主要包含三组地壳不连续面:沉积基底、壳内不连续面和莫霍不连续面,而潘诺尼亚类型地壳仅包含两组不连续界面。在潘诺尼亚型地壳中并未观测到壳内不连续面,因此认为潘诺尼亚盆地为单层地壳结构。应用接收函数正演模拟和H-κ叠加两种分析方法开展了地壳结构研究,并将该结果与Alp07剖面主动源折射地震结果进行了比较。接收函数模拟得到了可靠的莫霍面深度结果,与Alp07剖面的地震折射结果相一致,即潘诺尼亚区域地壳特征为简单地壳结构,波速较低(VP在5.9~6.2km/s)。迪纳拉及其周缘,由于地壳结构更为复杂,接收函数模拟得到莫霍面深度较Alp07剖面更大,高达15%。受短周期台站数据频带限制,利用H-κ叠加方法计算得到的莫霍面深度在较大范围内(±13km)变化。通过与先前所有结果进行对比,排除了差异较大的5个台站的结果,而与Alp07剖面附近的莫霍不连续面相比,其他7个台站莫霍面深度差异在15%内变化。
Through the passive source seismic experiment at the junction of the Dinar Range and the southwestern Pannonia basin, the crustal structure and velocity discontinuities were determined. The purpose of the experiment was to determine the relationship between the Adriatic Microclimate and the Pannonian massif that is part of the European plate. Most of the mobile stations are located in Croatia along the Alp07 profile (part of the initiative ALP 2002 project). The section extends about 300 km west-south-east-southeast from the Istrian Peninsula to the Drava River. Teleseismic Records of 13 Temporary Seismic Station on the Survey Line by P Wave Receiving Function Method. Two characteristic reception functions (RFs) are obtained in the Alp07 profile, belonging to the Denarau and Pannonian crusts. There are two types of boundary zones. The Denarau crust consists mainly of three sets of crustal discontinuities: sedimentary basement, intracavity discontinuities, and Moho discontinuities, whereas the Pannonian crust contains only two sets of discontinuities. The intracontinental discontinuities were not observed in the Pannonian crust, so the Pannonia basin is considered to be a single-layer crustal structure. The crustal structure was studied by forward analysis of receiver function and H-κ superposition method, and the result was compared with the seismic reflection results of active source of Alp07 profile. The receiver function simulation results in a reliable Moho depth result consistent with the seismic refraction results of the Alp07 profile. The crustal characteristics of the Pannonia region are characterized by a simple crustal structure and low velocity (VP of 5.9-6.2 km / s). Due to the more complicated crustal structure, the diurnal and its periphery are simulated by the receiver function, and the depth of the Moho is larger than that of the Alp07 by up to 15%. Due to the band limitation of the short-period station data, the Moho depth calculated by the H-κ superposition method changes in a wide range (± 13km). By comparing with all the previous results, the results of the five stations with large difference were excluded, while the depth differences of Moho at the other seven stations varied within 15% compared with the Moho discontinuities near the Alp07 section.