concentration by flow of water.
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deltas and placer deposits
placer deposits
placer deposits
GOLD
placer deposits from where water is moving fast enough to move lighter materials.
Minerals in placer deposits come from the erosion and weathering of rocks and minerals in the surrounding areas. These minerals are carried by water and eventually deposited in rivers, streams, and beaches where they settle due to their weight. The concentration of minerals in placer deposits can vary depending on the geology of the region.
Richard L. Lampright has written: 'Gold placer deposits near Anchorage, Alaska' -- subject(s): Gold mines and mining, Placer deposits
Apparently alluvial diamonds migrate into placer deposits, being moved there by natural means, such as flowing water. Other materials are simply ground into tiny bits and ultimately 'placed' into the low spots in the geography. Sand is a descriptor used to name the quality of the tiny stones that make up most of the materials in placer deposits: some metal bits and alluvial diamonds are also found in placer deposits. You can read more about them, below.
placer deposits
yes
such as placer deposits or metamorphic rocks that have undergone high-pressure and high-temperature conditions. These minerals include gold, platinum, and diamonds, known for their durability and resistance to chemical weathering processes.
Placer deposits are concentrations of valuable minerals that have been physically separated from the host rock by natural processes, such as erosion and sedimentation. These deposits typically accumulate in riverbeds, beaches, or other sedimentary environments where heavy minerals like gold, diamonds, or tin settle out due to their higher density. Mining of placer deposits often involves techniques such as panning, sluicing, or dredging to extract the valuable minerals.