冲绳海槽浮岩研究   总被引：1，自引：0，他引：1  

刘崇保 《岩石矿物学杂志》1989,8(3):193-202

目前国内外对冲绳海槽槽底火山岩的研究尚处在初级阶段。笔者对槽底八个样点的浮岩进行了系统的矿物岩石学研究。本文首次对酸性浮岩的中、基性火山岩包体进行了研究,揭示了酸性浮岩下部有相当面积的玄武岩及安山岩存在的事实。旨次提出海槽浮岩具有由基性→酸性较完整的火山活动旋回的认识。提出酸性浮岩是基性熔浆演化到后期的产物的观点,从而解释了存在多年的关于冲绳海槽构造问题争议中的焦点问题之一——“冲绳海槽既为弧后盆地,何以有大量酸性火山岩分布”的质疑。提出冲绳海槽浮岩属于岛弧火山岩的观点,对冲绳海槽构造的科学认识起了一定的积极作用。  相似文献   

核爆炸玻璃、撞击玻璃和玻璃陨石源岩   总被引：3，自引：0，他引：3       下载免费PDF全文

林文祝  欧阳自远 《地质科学》1991,(2):148-158

本文根据核爆炸岩石熔融玻璃的地球化学研究结果,与超速陨石撞击坑的熔岩进行比较,获得在远离热力学平衡条件下,各种玻璃和熔岩在化学成分上分布十分均匀的重要结论。岩石玻璃和熔岩是由基岩各组成岩石按一定比例混合熔融形成的。它们的主量元素和痕量元素丰度受基岩元素背景值制约。文中根据熔体和靶岩的化学成分,计算了熔岩各组成岩石的百分比。玻璃陨石是地壳岩石受撞击熔融形成的。同一撒布区的玻璃陨石化学成分相近,说明起源于同一源坑;而玻璃陨石化学成分的不同,则说明母岩组成分量的差异。因此,文中通过模拟计算,得出各玻璃陨石的组成源岩。澳大利亚撒布区的玻璃陨石,Al₂O₃,K₂O 和Na₂O 与 SiO₂及 K₂O/Na₂O 比值不完全相同,说明澳大利亚撒布区存在着几个不同的源岩和源坑,至少有印支、爪哇、菲律宾和澳大利亚四个相应撞击坑。  相似文献   

玻璃微珠折射率测定     

余模智 《武汉大学学报(信息科学版)》1994,(4)

提出了一种测量直径小于１ｍｍ的玻璃珠折射率的新技术，其精度可达１０－４，比常规的浸液法测量方便而又精确．  相似文献   

光学测微器的原理、检定及误差分析   总被引：4，自引：1，他引：4  

路杰 《测绘信息与工程》2002,27(4):23-24

着重讨论了高精度光学测微器的基本工作原理、检定方法及误差分析。  相似文献   

利用尾矿废石制造微晶玻璃花岗岩的投资可行性分析   总被引：5，自引：0，他引：5  

李克庆  刘保顺 《地质与勘探》2000,36(1):34-36,39

在论述尾矿废石利用现状的基础上,对利用尾矿废石制造微晶玻璃花岗岩的投资可行性进行了分析,提供了一套可用于此类决策的分析方法。  相似文献   

Magmatic Network Structure of Volcanic Rocks in the Shengli Oilfield, Eastern China     

HE Ying  ZHU Xingguo Department of Geology  Northwest University  Xi''an  Shaanxi  XU PeicangXi''an Institute of Geology  Chinese Academy of Geological Sciences  Xi''an  Shaanxi 《《地质学报》英文版》1998,72(2):191-197

Types of polymerized molecular network structure and degree of bond breakdown for glass phases of magmatic inclusions and glassy matrix in volcanic rocks from the Shengli oilfield have been defined by the laser Raman spectroscopic investigation. There are significant differences in types of polymerized molecular network structure and degree of bond 'breakdown of the magmatic glass phases between the non-CO2 and COa gas pools: magmatic glass phases of fluid inclusions and matrix in volcanic rocks from the CO2 gas pool contain more sheet network molecules and have a greater degree of bond beakdown than those from the non-CO2 gas pool; and when gas bubbles occur in evolving magma, magma saturated with volatile components has more sheet network molecules. The results suggest the magma-degassing mechanism of the formation of CO2 gas pools in the Shengli oilfield.  相似文献   

A History of the Development and Certification of NIST Glass SRMs 610-617     

Jean S. Kane 《Geostandards and Geoanalytical Research》1998,22(1):7-13

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Fish trapping experiments in Northern New Zealand waters     

James Crossland 《新西兰海洋与淡水研究杂志》2013,47(3):511-516

Fish trapping experiments were carried out during 1973–75 along the north‐east coast of the North Island. The most effective trap type was the Z‐trap. Two sizes of Z‐trap were tested. Better results were obtained with the larger ones, which had an overall mean catch rate of 8.4 fish/trap day. The catch rate varied widely between areas, bottom types, and seasons. Best results were obtained in summer in depths greater than 20 m.  相似文献   

硅酸盐玻璃中的Na和K含量电子探针分析条件设定探讨     

李芳洲  李小犁 《岩矿测试》2022,(2):161-173

含Ti硅酸盐玻璃在基础科学研究和应用技术开发上均有重要价值,亟需对其进行准确的成分分析,为进一步的科研工作提供重要的数据支撑.对玻璃进行电子探针分析时,由于样品的易损性和其中(Na和K)阳离子在电子束轰击下极易发生迁移和扩散,因此往往需要经过条件实验来确定合适的分析条件,确保样品在该条件下能够保持尽量稳定的状态,才能获...  相似文献   

LA‐ICP‐MS Analysis of Small Samples: Carbonate Reference Materials and Larval Fish Otoliths     

Angélique V. Lazartigues  Pascal Sirois  Dany Savard 《Geostandards and Geoanalytical Research》2014,38(2):225-240

This article proposes a methodology to analyse the composition of very small carbonate samples such as larval fish otoliths. The chemical composition of otoliths, which are carbonate structures in the inner ear, is often used to explore population dynamics in fishes. Recent advances in laser ablation‐inductively coupled plasma‐mass spectrometry have suggested its potential application to this field. In this study, analyses were performed using a 193 nm ArF Resonetics LA system, coupled to an Agilent 7700X‐ICP‐MS, with the following ablation parameters: a beam diameter of 5 μm, energy of 3 mJ, 2.7 J cm^?2, laser repetition rate of 10 Hz and translation speed of 2.5 μm s^?1. NIST SRM 610 glass was used as the primary calibration material. Performing this protocol, characterisation of a USGS GP‐4 reference material was achieved with suitable precision and accuracy, but the USGS MACS‐3 reference material appeared more heterogeneous under the ablation conditions tested. Calibration was performed using two different beam diameters (5 and 11 μm). Capelin (Mallotus villosus) otoliths measuring between 10 and 20 μm in diameter were tested. Even though a smaller beam diameter and lower energy were used compared with those normally employed to analyse larger otoliths, the method was successful.  相似文献