Banda-Celebes-Sulu basin - a trapped Cretaceous-Eocene oceanic crust
The Banda, Celebes and Sulu Basins are three poorly understood marginal seas that are located at the junction of the Eurasian, Indian-Australian, Pacific and Philippine Sea plates. The incomplete data sets from each of these three marginal basins, the complex geological arrangement of the surrounding islands, and the compound late Cenozoic evolutions involving subduction, rifting, transform faulting and island arc collision have complicated any tectonic interpretations of this region. On the bases of marine geophysical data and on-land geology, the authors propose that the Banda, Celebes and Sulu Basins are the remanents of a once-continuous Cretaceous to Eocene ocean basin. Magnetic anomalies from the Banda, Celebes and Sulu Basins show the similar trends of about N70/sup 0/E, N60/sup 0/E and N55/sup 0/E respectively. Their best fit to the reversal models are as follows: (1) anomalies M1-M11 in the Banda Basin, (2) anomalies 30-33 in the Celebes Basin and (3) anomalies 17-20 in the Sulu Basin. The heat flow data from each of these basins is consistent with the relationship of our assigned magnetic ages. The on-land geology of this region is complicated by numerous land masses which dissect this old oceanic basin into the present configuration of marginal seas. The authors argue that each of these land masses arrived at its present location by either late Tertiary tectonic movements or has been built in place upon this older oceanic basement.
- Research Organization:
- Texas A and M Univ., College Station (USA)
- OSTI ID:
- 6455911
- Report Number(s):
- CONF-8510489-
- Journal Information:
- Geol. Soc. Am., Abstr. Programs; (United States), Vol. 17; Conference: 98. annual meeting of the Geological Society of America, Orlando, FL, USA, 28 Oct 1985
- Country of Publication:
- United States
- Language:
- English
Similar Records
Origins of the Celebes and Sulu seas: Results of ODP Leg 124
Organic sedimentation response to tectonic and paleogeographic influences in Celebes and Sulu basins, west Pacific (ODP, Leg 124)
Related Subjects
AUSTRALIA
PLATE TECTONICS
SEA-FLOOR SPREADING
SEDIMENTARY BASINS
INDONESIA
OCEANIC CRUST
PALEOMAGNETISM
CRETACEOUS PERIOD
GEOLOGIC FAULTS
GEOLOGIC MODELS
GEOPHYSICAL SURVEYS
OCEANOGRAPHY
RIFT ZONES
SUBDUCTION ZONES
TERTIARY PERIOD
ASIA
AUSTRALASIA
CENOZOIC ERA
DEVELOPING COUNTRIES
EARTH CRUST
GEOLOGIC AGES
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
ISLANDS
MAGNETISM
MESOZOIC ERA
SURVEYS
TECTONICS
580201* - Geophysics- Seismology & Tectonics- (1980-1989)
580100 - Geology & Hydrology- (-1989)