一、地壳均衡与重力场 人类居住的地球,形象地说,好比一个大桃子,有皮、有肉,有核。地壳好比桃皮,地幔好比桃肉,地核好比桃核。地壳以下的情况人们了解得还很少,只好把它当成均质体看待。目前研究比较多的是地壳和与地壳紧密相连的上地幔。下面我们将通过重磁力场的特征来研究地壳结构的有关问题。 First, the balance of the Earth’s crust and the gravitational field Human beings live the Earth, vividly speaking, like a big peach, skin, meat, nuclear. The crust is like peach skin, the mantle is like peach, the nucleus is like peach kernel. People below the crust know very little, but treat it as a homogeneous body. At present, there are more studies on the crust and the upper mantle closely connected with the crust. Below we will study the features of the crustal structure by the characteristics of the gravity field.