
[地质] 火山口,[地质] 火山道
The development features of reservoir space are different in different lithofacies belts. In a word, around volcanic vent is favorable reservoir development position.
不同岩相带储集空间的发育特征不同,火山通道周围是有利储集层发育区。
The scientists determined that the depression was a volcanic vent, and the bright ring around it was pyroclastic, remnants of lava that had been spewed outward, much like a volcanic fountain on Earth.
科学家确定凹陷处是一个火山口,并且在它附近明亮的圆环是火山碎屑岩,是火山喷发出岩浆的残余,很象地球上的火山喷口。
They have both the flooding and the intrusive lithofacies but also have the volcanic and the volcano vent lithofacies and the lithology is mainly the middle acidic intrusive rocks.
既有溢流相,又有侵入岩相,还有次火山岩相和火山通道相;岩性主要以中酸性侵入岩为主。
|crater/diatreme;[地质]火山口,火山道
"volcanic vent"(火山通道)是火山系统中允许岩浆和气体从地球内部向地表传输的管状或裂缝状开口。作为火山活动的核心构造,其形成与板块运动密切相关,当地壳压力超过岩石强度时就会形成这种喷发通道。
根据美国地质调查局(USGS)的火山分类体系,火山通道主要分为三种类型:
火山通道的直径从几米到数公里不等,其形态直接影响喷发类型。狭窄通道更易形成爆炸式喷发,而宽大通道多表现为宁静式溢流。英国开放大学火山学研究显示,通道内的岩浆黏度与二氧化硅含量呈正相关,这决定了喷发物质的扩散范围(参考:open.ac.uk/earth-sciences)。
Volcanic Vent(火山口)指火山喷发时岩浆、气体及碎屑物质从地下喷涌至地表的通道出口。以下是详细解释:
如需进一步了解火山类型或喷发机制,可参考地质学资料或权威词典来源。
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