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本次研究是在秘鲁东南部的马德来特迪奥斯冲积平原上进行的,在这个巨大的冲积砂矿上,蕴藏着大量的黄金,有成千上万的人在这里淘金。 砂金产在冲积平原的现代河床上和老全新世的沉物中。砂金矿的富集地段主要沿河曲的砂坝上游部位分布。在新近的砂坝沉积物中,金的平均含量为200—500mg/m~3,而老全新世砂矿中金的平均含量为2—4g/m~3。自然金的颗粒特征反映了地貌特征和金粒的化学性质,已经查明,金颗粒都经过了远距离的搬运。 在依兰巴利、马德来特迪奥斯、马丽那斯喀和坦波帕特的河床上以及冲积平原上,采集了大约200个冲积物样品,采样点都经过了仔细的选择,以便于研究重矿物含量与河流地貌之间的关系。总共鉴定出有三十二种重矿物。
The study was conducted on the alluvial plain of Madeira di Odes in southeastern Peru, where a large amount of gold is stored in this huge alluvial deposit and tens of thousands of people are gold-mining here. Placer gold is deposited on modern beds in the alluvial plain and in the old Holocene sediments. The gold-rich gold deposits are mainly distributed along the upstream part of the sand dam of Hequ. In the recent sand bar sediments, the average gold content is 200-500 mg / m3, whereas the average gold content in the Old Holocene sand is 2-4 g / m3. The grain characteristics of natural gold reflect the geomorphological features and the chemical properties of the gold grains. It has been ascertained that the gold grains have been transported long distances. About 200 alluvial samples were collected on the banks of the Ilanbally, Madeira Teodos, Malinauskas and Tambopat and the alluvial plain, with careful selection of sampling points for To study the relationship between heavy mineral content and river topography. Thirty-two heavy minerals were identified in total.