1) sed pyroclatic rock
沉火山碎屑岩
1.
Distribution of diamonds and its indictor minerals are very abundant in Quaternary Dajingtou area in Feixian county, Shandong province with a high concentration degree; diamonds and its indicator minerals also occurred in Caledonian super-basic pyroclastic rocks, sed pyroclatic rocks and other rocks.
山东费县大井头地区第四系中金刚石及其指示矿物分布异常丰富 ,并且具有较高的集中度 ;该区的加里东期超基性火山碎屑岩、沉火山碎屑岩及其他一些岩石中均有金刚石和 (或 )指示矿物存在 ;该地区的铬铁矿异常属于矿致异常。
2) volcanic-clastic sedimentary rock
火山-碎屑沉积岩
1.
Petrological,mineralogical and geochemical characteristics of Ordovician volcanic-clastic sedimentary rocks in Bangxi area,Northwest Hainan Island,South China: Implications for provenance and tectonic setting;
海南岛北西部邦溪地区奥陶纪火山-碎屑沉积岩岩石学、矿物学和地球化学:源区及构造环境暗示
4) Volcaniclastic-sedimentary rock
火山碎屑-沉积岩
5) pyroclastic sedimentary rock
火山碎屑沉积岩
1.
Tuff commonly exists in reservoir with pyroclastic sedimentary rock;logging characteristic of shale and tuff is similar,both display higher GR value.
火山碎屑沉积岩储层普遍含凝灰,凝灰与泥质测井特征相似,均为高自然伽马,用常规石英砂岩的测井解释方法无法计算其储层泥质含量。
6) volcaniclastic rock
火山碎屑岩
1.
Because the type of igneous rock is more,it is very difficult to name and identify,we apply Bayesian discrimination to research lithologic identification in the logging interpretation of volcaniclastic rock.
针对火成岩岩石类型多、测井识别难度大问题,应用贝叶斯判别分析方法对火山碎屑岩测井解释中岩性识别问题进行研究。
2.
The Nibao gold deposit in Guizhou consists of multistory gold ore bodies,each of which is closely associated with the Permian volcaniclastic rocks.
泥堡金矿具多层含矿特征,各层金矿体均与二叠系火山碎屑岩密切相关。
3.
meanwhile,the volcaniclastic rocks were modificated by the thermal fluid activity,for example,sericitization of plagioclase,chloritization of volc.
同时,受热流体活动的影响,热流体对火山碎屑岩具有一定改造作用,如在安山质岩屑凝灰岩中,斜长石绢云母化、火山岩岩屑绿泥石化明显;在凝灰质泥岩中,热流体对围岩中有机碳具有明显的"催熟"加热作用,微量元素则出现异常现象。
补充资料：火成碎屑岩
| 火成碎屑岩 pyroclastic rock 由火山碎屑物质堆积而成的岩石。又称火山碎屑岩。其特征介于熔岩与正常沉积岩之间。火山碎屑物的含量一般大于50％，其次为正常沉积物或熔岩物质。碎屑物的种类有岩屑、晶屑、玻屑、火山弹、浮岩及火山渣等。碎屑物的大小不一，常见棱角状。具集块结构、火山角砾结构、凝灰结构、火山尘结构等和假流纹状、斑杂状、火山泥球状、层理状等构造。分为两大类型：①熔结火山碎屑岩。由火山碎屑物经熔结而成。通常火山碎屑物含量大于90％。包括熔结集块岩、熔结角砾岩、熔结凝灰集块岩和熔结凝灰岩等。②正常火山碎屑岩。由火山碎屑物质经一定的压实作用形成。包括集块岩、火山角砾岩、火山凝灰角砾岩和凝灰岩等。其中凝灰岩分布最广。此外，火山碎屑岩与熔岩和正常沉积岩之间还存在一系列过渡类型。广义上，含火山碎屑物质大于10％的岩石都可称作火山碎屑岩。与火山碎屑岩有关的矿产有各种金属和非金属矿产（如Fe、Cu、Pb、Zn、S、B等）。如中国甘肃的白银厂铜矿床、镜铁山铁矿床等。 |
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