Early Paleozoic Extension-Compression Transition and Formation of a Paleo-Oil Reservoir System in the NW Sichuan Basin: Implications for Deeply Buried Hydrocarbon Accumulation

Figure 9

Relationship between the TJS PU and MY-CN IS in different time periods. (a) The prototype of the TJS PU is thought to have formed in the Late Cambrian; (b) corresponding to the Yunan movement, the TJS PU reached its maximum extent; (c) in the Caledonian, the TJS PU was still approximately 10–20 km away from the MY-CN IS; (d) the TJS PU area is reflected and dominated by regression of cyclical sea-level variation in the Hercynian.

(a)

(b)

(c)

(d)