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首页> 外文期刊>Journal of South American earth sciences >Upper-lower crust thickness of the Borborema Province, NE Brazil, using Receiver Function
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Upper-lower crust thickness of the Borborema Province, NE Brazil, using Receiver Function

机译：巴西尼日尔东北部Borborema省的上，下地壳厚度，使用接收函数

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The thickness estimates of the upper-crust and the V_p/V_s ratios are essential in order to detail the structures and geologic features. They also corroborate the regional tectonic evolution models. The crust study using the Receiver Function is performed with teleseismic P-waves that reaches the interface, under the station, with an almost vertical angle. The Receiver Function is obtained through the decon-volution of the horizontal component from the vertical one. The synthetic seismogram of the Receiver Function has a higher peak of direct P-waves, followed by minor peaks of Psc waves, where P converted into S in the upper-lower crust limit and multiple reflections. It was used the phase weighted slant-stacked method for the estimate of upper-crustal thickness and m_b ratio. The best estimates are correctly stacked. The Normal Moveout correction for the Psc phase was used for the upper-crust thickness, simulating a vertical incidence. A total of 8 stations on the Borborema Province in the Brazilian Northeast was analyzed. The results show that there is an upper-lower crust limit in all the analyzed signs. The thickness estimates showed two thickness regions. The first one in Coast Region, that indicates of the thin upper-crust and the second, continental regions characterized by uniform thicker upper-crust. East station data suggests underplating of mafic bodies.
机译：为了详细说明结构和地质特征，上地壳的厚度估算和V_p / V_s比是必不可少的。他们还证实了区域构造演化模型。使用接收器功能进行的地壳研究是通过远震P波以几乎垂直的角度到达站下方的界面进行的。接收器功能是通过将水平分量从垂直分量解卷积而获得的。接收器功能的合成地震图具有较高的直接P波峰，其次是Psc波的次峰，其中P在上地壳下限和多次反射中转换为S。使用相加权倾斜叠加法估算上地壳厚度和m_b比。最佳估计值正确堆叠。 Psc相的法向偏移校正用于上地壳厚度，模拟了垂直入射。对巴西东北部Borborema省的8个站点进行了分析。结果表明，在所有分析的迹象中都有一个较高的结壳下限。厚度估计显示了两个厚度区域。海岸地区的第一个区域表示上地壳薄，第二个大陆区域的特点是上地壳厚度均匀。东站的数据表明黑手党的身体不足。

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