1.The upheaval zone in upper mantle is the primary factor controlling the distribution of gulch-gold mines and lode gold mines.
上地幔隆起区是控制砂金矿和岩金矿面式分布的主要因素。
2.During Quaternary period, the gulch-gold mines are eventually formed with the action o. . .
在第四纪，在冰川和径流作用下最终形成了砂金矿床。