Page 62 - The Petroleum System From Source to Trap

3. Petroleum Systems of the World Involving Upper Jurassic Source Rocks 55

Figure 3.4. Africa Upper Jurassic deposition areas, petroleum systems, and Lower-Middle Jurassic source facies (central
Gondwana sector). (See Figure 3.1 for explanation of symbols.)

Kimmerian circum-Pacific orogenic-accreted zone Petroleum Geotectonic Realm Location
terranes. By material balance, the craton appears to be
the locale of the more prolific petroleum systems; Petroleum realms, as used here, consist of the Tethyan
however, when the Arabian-Iranian and West Siberian realm, which divides the southern Gondwana realm
super basins are excluded, the Hercynian and Cale­ from the Boreal realm, and the Pacific realm (Klemme
donian terranes appear to underlie the more prolific and Ulrnshek, 1991). The Tethyan realm is related to an
petroleum systems (Table 3.4). east-west equatorial seaway that opened and closed