砂金的搬運(yùn)方式，根據(jù)沈陽礦產(chǎn)所呂英杰等同志的研究有四種：?jiǎn)蔚V物（金粒）搬運(yùn)，“運(yùn)載”式搬運(yùn)，接力式搬運(yùn)，金在水溶液中搬運(yùn)。我國(guó)主要江河如黑龍江、黃河、長(zhǎng)江、珠江、額爾齊斯河、遼河、灤河等均產(chǎn)砂金。砂金的分布不是普遍的，一級(jí)水系長(zhǎng)江、黃河、額爾齊斯河等雖有砂金分布，但品位低，深度大，顆粒一般較細(xì)。目前尚難利用。二級(jí)水系砂金礦化比較普遍，如湘江、沅江、昌江、漢水、洛河等的沙洲、沙壩、邊灘大都分布有砂金礦點(diǎn)。但品位低、規(guī)模小。3～4級(jí)支流河谷是砂金主要賦存部位，也是工業(yè)開發(fā)的主要對(duì)象。5級(jí)以上的支溝細(xì)谷規(guī)模小、品位較富，是民采的主要對(duì)象。
由于水流動(dòng)態(tài)所致，我國(guó)西部砂金主要以沖洪積、冰磧型為主，東部地區(qū)以沖積型為主。內(nèi)蒙古高平原區(qū)以洪積型為主。
The placer gold of the mode of transport, according to the study of Shenyang mineral the LV Yingjie comrades there are four: Handling single minerals (Jin Li) and "carry" handling, handling relay, gold in aqueous solution in handling. China's major rivers such as Heilongjiang, the Yellow River, the Yangtze River, Pearl River, Irtysh River, Liaohe River, Luanhe River were producing gold. The distribution of placer gold are not universal, the first-order stream Yangtze River, Yellow River, Irtysh River and although the distribution of placer gold, but low grade, depth, particles are generally smaller. At present, it is difficult to use. Secondary drainage systems of placer gold mineralization is relatively common, such as the Xiangjiang River, the Yuanjiang River and the Changjiang and Hanjiang River, Luo, etc. of the sandbar, sand dam, beaches are mostly distributed placer gold deposits. But the grade is low, the scale is small. 3 ~ 4 tributary Valley is the main gold occurring position, is also the main object of industrial development. 5 levels above the small valley of the small valley, rich in quality, is the main object of the people.
Because the water flow caused by dynamic, China mainly in the alluvial placer gold, moraine type, the eastern region is dominated by alluvial type. The high plain area of Inner Mongolia is dominated by flood. |
