The Mesozoic Tectonic Dynamics and Chronology in the Eastern North China Block

Table 3

Time-range index of main Mesozoic structure events in the eastern North China Block [39].

Structure belt	Dabie			West Shandong	Yanshan
Rock type	(Ultra) mafic rocks	Granite/shear zone	Metamorphic rock (migmatite)	Intermediate-mafic rock	Intrusive	Shear zone
Isotopic age of compression (Ma)	220–240	190	230–240	230–250	165–180	~150; ~219
Isotopic age of extension (Ma)	120–130	~120	117–130	115–130	111–130	116–140
Structural index of compression	The oldest deposit in foreland molasse basin is Mid-Triassic and the youngest one is upper Jurassic			𝛾^35 undeformed	J2 or J3 (Tiaojishan group) deformed
Structural index of extension		J3, 𝛾^35 deformed	J3 or K1 deformed	K1 deformed