TECTONIC EVOLUTION OF THE TARIM BASIN
TECTONIC EVOLUTION OF THE TARIM BASIN
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发表时间：
2005
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通讯作者：
Yang Ke-sheng
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作者：
Yang Ke-sheng
地震剖面显示塔里木盆地呈“手风琴”状演化。盆地总体上具有三种“断陷”构造：①震旦系断裂、古生界—三叠系凹陷； ②侏罗纪断层、晚白垩世凹陷； ③古近纪断裂、新近纪凹陷。这些断层和凹陷分别是由拉应力场和压应力场造成的，这种应力场的变化是由于邻近洋壳俯冲倾角由小到大的变化造成的。由于地壳的多旋回运动，构造沉积变化频繁发生。结果，产生了成套的生油、油藏和封盖组合。从震旦纪到古生代，再到中生代，再到新生代，每种断陷构造都可能有其自身形成油气藏的地质条件。
Seismic sections show that the Tarim basin evolved in an “accordion” way. Generally, the basin has three “fault-depression” structures: ① Sinian fault, Paleozoic-Triassic depression; ② Jurassic fault, late Cretaceous depression; and ③ Palaeogene fault, Neogene depression. These faults and depressions were made respectively by tension and compression stress fields, and changes of such stress fields were due to the changes of subduction dips from small to large of the neighboring oceanic crust. Due to the multicyclic movements of the crust, tectonic sedimentary changes took place frequently. As a result, sets of oil generation, reservoir and capping associations were produced. From Sinian to Paleozoic to Mesozoic and to Cenozoic, each fault-depression structure may have its own geologic conditions to form oil-gas pools.