The gas pool of Lower Paleozoic is probably formed in Himalayans period.
下古生界气藏很可能形成于喜山期，其扩散损失量较小；
Paleozoic non-structural trap, which is the main trap type of large oil and gas fields;
古生界非构造圈闭是大型油气田的主要圈闭类型；
The ocean basin became more narrow in early Late Paleozoic, which last several millions years.
晚古生代早期的洋盆较狭窄，生存时间为数千万年。
The ocean basin became more narrow in early Late Paleozoic, which last several millions years.
晚古生代早期的洋盆较狭窄，生存时间为数千万年。
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