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1958年秋,在山东沂水銅井矿区,以物探化探方法进行找矿。在銅井本区及其外圍都找到了銅矿。实踐证明,对于象本区的这种矽卡岩类型的銅矿床,物探化探工作,对勘探工作的布置可以起到有効的指导作用。在很大的程度上減少了地質普查或山地工作的盲目性,加快了地質普查勘探工作的速度。一、地質情況 本区位于山东地台,主要岩层除前震旦紀变質岩系外(出露很少),以古生代之沉积岩为主。其中有震旦紀石英岩、矽質灰岩、下寒武紀紫色頁岩、中寒武紀鲕状灰岩、上寒武紀竹叶状灰岩。此外在矿区东部一带出露有白堊紀杂色砂頁岩夹凝灰岩及安山岩。燕山运动之后,本区有大量的火成岩侵入于灰岩中,其中有閃长斑岩、閃长玢岩和花崗岩等,后者出露于矿区西部一带。
The autumn of 1958, in the Yishui copper mine in Shandong, geophysical and geochemical exploration methods for prospecting. Copper Mine has been found in and around the area. Practice has proved that for this type of skarn-type copper deposit in this area, geophysical and geochemical exploration work can play an effective guiding role in the layout of exploration work. To a large extent reduce the blindness of geological census or mountain work, and speed up the work of geological survey exploration. First, the geological conditions The area is located in Shandong platform, the main rock formation in addition to pre-Sinian metamorphic rocks (exposures rarely), mainly to the Paleozoic sedimentary rocks. Among them are Sinian quartzite, siliceous limestone, Lower Cambrian purple shale, Middle Cambrian oolitic limestone, and Upper Cambrian bamboo leaf limestone. In addition, the Cretaceous variegated sand shale clastic tuff and andesite are exposed in the eastern part of the mining area. After the Yanshan movement, a large number of igneous rocks intruded into the limestone, including dioritic porphyry, diorite porphyrite and granite, which were exposed in the western part of the mining area.