甘肃凉州、甘州、肃州之南,青海之北(名曰祁连山)祁连山北麓各沟谷中之砂砾层(奴甘州城东南之苏榆口及西南之梨园口等)含有自然铜矿,普通长三寸,宽二寸,厚半寸,所见之最大者长一尺馀,宽六寸,厚三寸,皆无棱角,知为远处冲 Gansu Liangzhou, Ganzhou, Suzhou south, north of Qinghai (Qilian Mountains) Qilian Mountains in the northern foothills of the gravel layer (Nauganzhou southeastern Suyu mouth and southwest of Liyuan mouth, etc.) contains natural copper , Usually three inches long, two inches wide and half a inch thick, the largest of the long one foot long, six inches wide, thick three inches, are angular, known as the distance Chong