placer

简明释义

英[ˈpleɪsə(r)]美[ˈplesər;ˈplæsər]

n. 冲积矿；放置者

n. （Placer）人名；（捷）普拉采尔；（西）普拉塞尔

英英释义

单词用法

同义词

反义词

例句

1.Thus it will guarantee the primary placer gold sampling and reduce the Labour intensity of workers, in order to raise the drilling efficiency.

从而能保证取出原生矿样，并降低工人的劳动强度，实现钻进的高效率。

2.A placer gold area is usually distributed in the flowing regions of plain terrain, belt-like rivers.

砂金地区一般分布在地形平坦、呈带状的江河流域。

3.Shore REE placer is one of the most important exogenetic ore deposits of REE.

外生稀土矿床中最重要的是海滨砂矿。

4.Owing to the metallogenetic inheritance of placer gold and mountain gold, their liquid-inclusion composition are very similar.

由于成矿作用的继承性、砂金的气液包体成分同原生的金十分相似。

5.Roseville is located in Placer County and is nearly equidistant from the Sierra Nevadas and the Pacific Coast.

罗斯维尔位于普莱瑟郡，距离塞拉利昂内华达州和太平洋海岸几乎相同。

6.Placer mining is based on the FACT that heavier substances can be separated from lighter ones in water.

较重的物质可在水中与较轻的物质分离，砂矿开采正是利用这个原理。

7.Placer tin deposit in Xupu occurs in alluvial sediment of Quatemary SyStem and CaSSiterite chiefly concentrates at the bottom of Gravel layers.

溆浦砂锡矿床赋存在第四系冲积层中，锡石主要富集在底部砂砾石层。

8.The regenerated mineralization of placer gold by thawing action are also proved through simulation, contrast and experiment.

并通过模拟对比实验结果，论证了融冻作用使砂金再生成矿。

9.The gold rush attracted many miners hoping to become rich by finding a good placer.

淘金热吸引了许多矿工，希望通过找到一个好的 placer 而致富。

10.In the river, we discovered a placer deposit of gemstones.

在河里，我们发现了一处宝石的 placer 沉积。

11.The placer mining technique is often used in areas with loose sediment.

在松散沉积物较多的地区，通常使用 placer 采矿技术。

12.He found a small placer of silver while panning for gold.

他在淘金时发现了一小块银 placer 。

13.The placer claims were staked out by several prospectors.

几个探矿者已经划定了这些 placer 权利。

作文

In the world of geology and mining, the term placer refers to a type of mineral deposit that has accumulated in a particular area due to the action of water. These deposits are often composed of valuable minerals, such as gold, platinum, and gemstones, which have been eroded from their original source and transported by rivers and streams. The significance of placer deposits cannot be overstated, as they have played a crucial role in the history of mining and the economy of many regions. Historically, placer mining has been one of the earliest forms of mining practiced by humans. It is a method that is relatively simple and requires less technology compared to hard rock mining. Miners can use basic tools like pans, sluices, and highbankers to extract precious metals from riverbeds and stream banks. This accessibility has made placer mining particularly popular during gold rushes, such as the famous California Gold Rush of the mid-19th century. The process of placer mining involves several steps. First, miners identify areas where placer deposits are likely to be found, often looking for signs of erosion or sedimentation. Once a potential site is located, they will dig through the soil and gravel to reach the layer where the valuable minerals are concentrated. Afterward, they wash the material to separate the heavier minerals from the lighter ones, using the principle of density. This technique allows miners to recover precious metals efficiently. One of the most fascinating aspects of placer mining is the variety of environments in which it can occur. While many people associate placer deposits with rivers and streams, they can also be found in other locations, such as beaches and deserts. For instance, beach placer deposits often contain heavy minerals like ilmenite and zircon, which are valuable for industrial applications. Similarly, desert placer deposits can yield precious gems like diamonds and sapphires. Despite its relatively low-tech nature, placer mining can have significant environmental impacts. The disturbance of riverbanks and stream beds can lead to erosion, habitat destruction, and changes in water quality. Therefore, modern regulations often require miners to follow specific guidelines to minimize their impact on the environment. Sustainable practices, such as restoring mined areas and using less invasive extraction methods, are becoming increasingly important in the field of placer mining. In conclusion, the term placer encompasses a rich history and a vital aspect of mining that continues to this day. Whether it is the thrill of finding gold in a river or the industrial importance of heavy minerals, placer deposits offer a glimpse into the dynamic interplay between natural processes and human activity. As we move forward, understanding the implications of placer mining will be essential for balancing economic interests with environmental stewardship.

在地质和采矿的世界中，术语placer指的是由于水的作用而在特定区域积累的一种矿物沉积。这些沉积通常由有价值的矿物组成，如黄金、铂金和宝石，这些矿物已经从其原始来源被侵蚀并通过河流和溪流运输。placer沉积的重要性不容小觑，因为它们在许多地区的采矿历史和经济中发挥了关键作用。 从历史上看，placer采矿是人类最早实践的采矿形式之一。这是一种相对简单的方法，与硬岩采矿相比，需要的技术较少。矿工可以使用如平底锅、洗矿槽和高架洗矿机等基本工具，从河床和溪岸提取贵金属。这种可及性使得placer采矿在淘金热期间特别受欢迎，例如19世纪中叶著名的加利福尼亚淘金热。 placer采矿的过程涉及几个步骤。首先，矿工识别出可能发现placer沉积的区域，通常寻找侵蚀或沉积的迹象。一旦找到潜在地点，他们就会挖掘土壤和砾石，以到达集中有价值矿物的层次。之后，他们会冲洗材料以分离重矿物和轻矿物，利用密度原理。这种技术使矿工能够高效地回收贵金属。 placer采矿中最迷人的方面之一是它可以发生的环境多样性。虽然许多人将placer沉积与河流和溪流联系在一起，但它们也可以在其他地方发现，例如海滩和沙漠。例如，海滩placer沉积通常含有重矿物，如钛铁矿和锆石，这些矿物在工业应用中具有价值。同样，沙漠placer沉积可以产生贵重宝石，如钻石和蓝宝石。 尽管其相对低技术性质，placer采矿可能对环境产生重大影响。河岸和溪床的扰动可能导致侵蚀、栖息地破坏和水质变化。因此，现代法规通常要求矿工遵循特定准则，以最小化对环境的影响。可持续实践，如恢复采矿区和使用较少侵入性的开采方法，在placer采矿领域变得越来越重要。 总之，术语placer包含丰富的历史和至今仍然重要的采矿方面。无论是在河中发现黄金的刺激，还是重矿物的工业重要性，placer沉积提供了一瞥自然过程与人类活动之间动态相互作用的机会。随着我们向前发展，理解placer采矿的影响对于平衡经济利益与环境保护至关重要。