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1981年对Campidano地热田及其邻区进行了重力测量,这次测量覆盖面积1900km~2,包括952个均匀分布的测点,Campidano地堑区其布格异常一般为负,中央区达-10mGal,而在地堑外围正布格异常占优势,有几个区超过20mGal。本文用频谱分析和二维模型解释了这些重力资料,确定了地堑区的沉积物和安山质火山岩的厚度,中央区的这些地层总厚度达3000m,但四周变薄,特别是地堑的边缘,地堑东西两边的热泉与剩余正异常有关,且靠近很陡的布格异常梯度带。
In 1981, the gravimetric measurement of Campidano geothermal field and its adjacent area was conducted. The survey covers an area of 1900km ~ 2 and includes 952 evenly distributed measuring points. The Campigano graben area generally has a Bouguer anomaly negative and a central area of -10mGal , While in the periphery of the graben, the overburst is predominant, with several areas exceeding 20 mGal. This paper explains the gravity data by spectral analysis and two-dimensional model, and determines the thickness of the sediments and andesitic volcanic rocks in the graben area. The total thickness of these strata in the central area is up to 3000m, but thinning around, especially the graben Edge, the thermal springs on both sides of the graben are related to the residual positive anomalies, and close to the steep Bougie anomaly gradient zone.