1) Datong sandstone
大同黑砂岩
1.
Effect of process elements doing on synthesis of β-SiAlON from Datong sandstone;
大同黑砂岩合成β-SiAlON材料的工艺参数的研究
2) Dazhan sandstone
大占砂岩
1.
According to sedimentary characteristics,the thickness of II1 coal has close relation with the Dazhan sandstone,the sandstone body presents fingerparted splitting northeastward,II1 coal is scoured by Dazhan sandstone distributary channels in southwestern minefield,makes coal seam thinning even totally scoured and forms barren zone of coal.
根据沉积特征分析,二1煤厚度与大占砂岩密切相关,砂体呈向北东方向指状分叉展布,井田西南部二1煤遭受大占砂岩分流河道的冲刷,使煤层变薄,甚至可能完全被冲刷,形成无煤带。
3) kentsmithite
黑色含钒砂岩
4) Daheishan magmatic rock
大黑山岩体
1.
Daheishan magmatic rock is a complex composed of quartz diorite and porphyry granite.
大黑山岩体是由石英闪长岩和斑状花岗岩构成的复式岩体 ,它们系同源岩浆不同演化阶段的产物 ,岩石类型属重熔型花岗岩。
5) Datong pluton
大同岩体
1.
The Datong pluton,intruded in the West-Kunlun region during the Ordovician,plays an important role in exploring the tectonic evolution history of the West-Kunlun region during Paleozoic time,which is still under debate.
大同岩体位于西昆仑北带,形成于早奥陶世,对于研究西昆仑造山带早古生代构造演化具有重要意义,但对其形成的构造环境的认识还具有很大的不确定性。
6) Daqing sandstone reservoir
大庆砂岩油藏
补充资料：粉砂岩
| 粉砂岩 siltstone 由粒径为0.0625～0.0039毫米（mm）的粉砂的含量占50％以粉砂岩标本的一种碎屑沉积岩。除粉砂以外其它由砂、粘土或化学沉淀物组成。按粒度划分为粗粉砂岩（0.0625～0.0312mm）和细粉砂岩（0.0312～0.0039mm）。按碎屑成分划分为石英粉砂岩、长石粉砂岩、岩屑粉砂岩（少见）和它们间的过渡类型。根据胶结物成分划分为粘土质粉砂岩、铁质粉砂岩、钙质粉砂岩和白云质粉砂岩。黄土也是一种疏松的或半固结的粉砂质沉积物。粉砂岩多形成于河漫滩、三角洲、潟湖和海洋的较深水部位。
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参考词条