[地質] 火山口，[地質] 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.
不同岩相帶儲集空間的發育特征不同，火山通道周圍是有利儲集層發育區。
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.
科學家确定凹陷處是一個火山口，并且在它附近明亮的圓環是火山碎屑岩，是火山噴發出岩漿的殘餘，很象地球上的火山噴口。
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，還有次火山岩相和火山通道相；岩性主要以中酸性侵入岩為主。
|crater/diatreme;[地質]火山口，火山道
"volcanic vent"（火山通道）是火山系統中允許岩漿和氣體從地球内部向地表傳輸的管狀或裂縫狀開口。作為火山活動的核心構造，其形成與闆塊運動密切相關，當地殼壓力超過岩石強度時就會形成這種噴發通道。
根據美國地質調查局（USGS）的火山分類體系，火山通道主要分為三種類型：
火山通道的直徑從幾米到數公裡不等，其形态直接影響噴發類型。狹窄通道更易形成爆炸式噴發，而寬大通道多表現為甯靜式溢流。英國開放大學火山學研究顯示，通道内的岩漿黏度與二氧化矽含量呈正相關，這決定了噴發物質的擴散範圍（參考：open.ac.uk/earth-sciences）。
Volcanic Vent（火山口）指火山噴發時岩漿、氣體及碎屑物質從地下噴湧至地表的通道出口。以下是詳細解釋：
如需進一步了解火山類型或噴發機制，可參考地質學資料或權威詞典來源。
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