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。
Separated from the deposit and scattered on the river side of the foundation rock, and gradually be covered with sand, forming alluvial sand.
自矿床分离而散落于溪旁基础岩石上，逐步被沙土覆盖，形成冲积性砂。
By the study of the feature of alluvial gold conjuncture, its haul distance was determined, the types of its Primary deposits assessed and the target area for ProsPecting Primary deposit defined.
介绍了研究砂金连生体特性，借以确定砂金的搬运距离、判断原生金矿床类型并进行预测，以及确定原生金矿靶区的应用范例。
This paper has analysed the Hunan alluvial gold deposit and its present mining status.
本文分析了湖南砂金矿床及砂金的开采情况。
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 soil erosion in the alluvial gold deposit is serious because of the vegetation destroyed.
沙金矿废弃矿区．由于森林植被被破坏，水土流失严重，形成矿区荒漠化。
Results show that response at surface points of the alluvial soil deposit are amplified significantly for given conditions of shape, dimension and material properties of the soil and the canyon.
计算结果表明：在给定河谷形态、尺寸和材料性质条件下，沉积层表面各点的响应显著放大。
Such study of the optimal industrial grade of the ancient conglomerate alluvial gold deposit is seldom seen abroad and the first time to be made domestically.
砾岩型古砂金矿床的工业品位研究在国内尚属首例，国外也不多见。
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。
The eastern part is multi-stages fan delta deposit system witch is controlled by the monocline and step-fault zone and another parts in the area grow alluvial fan system.
东部为单斜、顺向断阶带构造背景控制下的多期次的扇三角洲沉积体系，部分地方发育冲积扇体系。
Ancient submarine forest grew in alluvial-pluvial deposit in Holocene Changle group, and the growing era is damp and hot climate environment as about 7000 ~ 7500 years ago;
该海底古森林生长于全新世长乐组冲洪积层中，生长时代为距今约7000—7500 a，为湿热气候环境；
Ancient submarine forest grew in alluvial-pluvial deposit in Holocene Changle group, and the growing era is damp and hot climate environment as about 7000 ~ 7500 years ago;
该海底古森林生长于全新世长乐组冲洪积层中，生长时代为距今约7000—7500 a，为湿热气候环境；
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