Placer deposit is highly developed in USSR.
苏联的砂矿矿床比较丰富。
A middling placer deposit of tin has been discovered in Jiudaowan district.
九道湾地区已发现中型砂锡矿床。
Liaoning Xiuyan nephrite Placer deposit (XNPD) is a secondary deposit of primary nephrite ore.
辽宁岫岩软玉砂矿(又称河磨玉矿)是原生软玉矿的次生砂矿床。
Then, dispersal gold placer within the intermediate store body was enriched in gravel bed of detention in river bed after many times intermittent elevation, and the gold placer deposit was formed.
当地壳多次间歇性上升后，使砂金中间储存体中分散的砂金集中富集在河床滞留砾石层中，从而形成砂金矿床。
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。
At last, exploring guides for placer gold deposit are pointed out on the base of study of gold source, placer gold distributive features and enrichment law.
结合金的来源、矿床的分布特征和富集规律，指出了该区今后砂金找矿方向。
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。
The source materials of the placer gold deposit in the area are from skarn — typed Au — Ag — Cu — Fe polymetallic ore.
矽卡岩型金银铜铁多金属矿床等是本区砂金矿的物质来源。
The basin was filled with thick sediments of Quaternary lake and alluvial facies and accumulated with tin placer which is locally enriched to be commercial deposit.
盆地中充填有第四纪湖相-冲积相厚层沉积，有砂锡聚集，局部富集成矿床。
Thailand is one of main countries producing tin in the world, and its ore deposit types are the shallow-sea deposit placer tin in main.
泰国是世界上产锡的主要国家之一，其矿床类型主要是浅海沉积型砂锡矿。
The origin of the deposit belongs to Quarternary eluvial placer type.
矿床成因属第四纪残积型。
The origin of the deposit belongs to Quarternary eluvial placer type.
矿床成因属第四纪残积型。
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