排序方式: 共有68条查询结果,搜索用时 15 毫秒
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利用YJ-3000t和JL-3600t多顶砧压力机,以哀牢山造山带南部红河县大白能—乐育剖面上的天然块状斜长角闪岩为初始样品,在950℃、1.0~3.5GPa、恒温20~300h条件下进行了两个系列的斜长角闪岩块状样品脱水部分熔融实验:(1)保持温度T=950℃,加热时间t=100h不变,改变压力(1.0~3.5GPa)的实验;(2)保持温度T=950℃,压力p=3.0GPa不变,改变加热时间(20~300h)的实验。结果表明,1.0~3.5GPa、950℃、恒温100h的条件下,随压力升高,斜长角闪岩中依次生成了单斜辉石+石榴石+熔体的矿物组合(1.0~1.5GPa)和单斜辉石+石榴石+熔体+硬玉+SiO2矿物+蓝晶石(2.0~3.5GPa)的矿物组合。3.0GPa、950℃条件下,随加热时间增加,实验产物中依次生成了单斜辉石+石榴石+熔体+硬玉+SiO2矿物+蓝晶石的矿物组合(20~100h)和单斜辉石+石榴石+熔体的矿物组合(150~300h)。斜长角闪岩的原岩结构决定了实验产物中新生矿物和熔体的分布。依据实验产物的矿物组合和新生矿物的分布特征,讨论了950℃、1.0~3.5GPa、恒温(20~300h)条件下,斜长角闪岩部分熔融过程的结构变化、变质反应以及石榴石冠状体的成因。 相似文献
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地震台供电系统的探讨与实践 总被引:1,自引:1,他引:0
"十五"项目实施中,对于地震台站的供电系统的建设引起了工程实施技术人员的重视.主要问题是如何构建一套科学的、合理的供电系统以保障地震台系统的连续可靠运行. 相似文献
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Gas hydrate research has significant importance for securing world energy resources, and has the potential to produce considerable
economic benefits. Previous studies have shown that the South China Sea is an area that harbors gas hydrates. However, there
is a lack of systematic investigations and understanding on the distribution of gas hydrate throughout the region. In this
paper, we applied mineral resource quantitative assessment techniques to forecast and estimate the potential distribution
of gas hydrate resources in the northern South China Sea. However, current hydrate samples from the South China Sea are too
few to produce models of occurrences. Thus, according to similarity and contrast principles of mineral outputs, we can use
a similar hydrate-mining environment with sufficient gas hydrate data as a testing ground for modeling northern South China
Sea gas hydrate conditions. We selected the Gulf of Mexico, which has extensively studied gas hydrates, to develop predictive
models of gas hydrate distributions, and to test errors in the model. Then, we compared the existing northern South China
Sea hydrate-mining data with the Gulf of Mexico characteristics, and collated the relevant data into the model. Subsequently,
we applied the model to the northern South China Sea to obtain the potential gas hydrate distribution of the area, and to
identify significant exploration targets. Finally, we evaluated the reliability of the predicted results. The south seabed
area of Taiwan Bank is recommended as a priority exploration target. The Zhujiang Mouth, Southeast Hainan, and Southwest Taiwan
Basins, including the South Bijia Basin, also are recommended as exploration target areas. In addition, the method in this
paper can provide a useful predictive approach for gas hydrate resource assessment, which gives a scientific basis for construction
and implementation of long-term planning for gas hydrate exploration and general exploitation of the seabed of China. 相似文献
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高温高压岩石粒间熔体(和流体)形态学及其研究进展 总被引:2,自引:0,他引:2
高温高压岩石粒间熔体(和流体)形态学是现代岩石学的前沿领域之一。它主要研究高温高压下低程度部分熔融(或含少量流体)岩石中,矿物颗粒之间熔体(或流体)形态特征、连通性,以及与周围矿物相互关系的科学。研究中较多地借鉴了材料科学的研究方法,与界面物理化学密切相关。高温高压下地幔岩石粒间熔体(和流体)形态学的研究为探讨地幔部分熔融作用、软流圈和地幔交代作用的成因提供了重要的实验依据,已成为地球深部研究的重要手段之一。目前该学科还没有为我国广大地学工作者所熟悉。为此,对高温高压岩石粒间熔体(和流体)形态学的基础理论、实验方法,以及某些实验研究结果进行简要介绍,从而为读者对该学科的了解提供一些便利。 相似文献