在讲述地球历史中的矿石建造之前,我们必须考虑成为现在划分地质时期依据的主要事件。地球的年龄经计算为46亿年,误差在0.5亿年以内。目前,我们对地球历史最初的6亿年还一无所知。近来已经证实在格陵兰,拉布拉多半岛东海岸、明尼苏达州和南非产有约40亿年前的最古老的原始大陆的残余物。在图1所列的地质年表中,三角形表示用绝对地质年代学方法测定的地球历史中的主要构造-岩浆旋回。有阴影的三角形表示1966年第一个地质年表 Before describing the construction of ore in Earth’s history, we must consider the major events upon which the geological division of geology is now based. The Earth’s age is calculated at 4.6 billion years with an error of less than 50 million years. At present, we are still ignorant of the first 600 million years of Earth’s history. It has recently been confirmed that in Greenland, the east coast of the Labrador, Minnesota and South Africa have the remains of the oldest primitive continent about 4 billion years ago. In the geochronology of Figure 1, the triangles represent the major tectonic-magmatic cycle in Earth’s history as determined by the method of absolute geochronology. The shaded triangle represents the first geologic chronology of 1966