Synsedimentary tectonic control of Paleozoic clastic deposition in Maranhao Basin, Northeast Brazil
Conference
·
· Am. Assoc. Pet. Geol., Bull.; (United States)
OSTI ID:6562243
The Silurian to Eo-Carboniferous sequence of this basin was investigated by a detailed study of 547 cores belonging to 27 key stratigraphic wells. Paleoenvironmental interpretations for each chronostratigraphic interval were based on the associations of sedimentary structures and detailed petrography for the coarse clastic rocks and on distribution of clay minerals, on geochemistry of boron and trace metals, and on palynofacies for the shales.Two sedimentary models were recognized: coalescent deltas and glacial disruption of coalescent deltas. The variation through time of all sedimentologic and geochemical parameters for coarse clastic rocks and shales demonstrates that the entire sedimentation, and particularly the location of the deltaic reservoirs, was directed by the dfferential vertical movements of a mosaic of blocks, limited by 3 sets of reactivated tectonic lineaments.
- Research Organization:
- Illinois Univ, Urbana-Champaign
- OSTI ID:
- 6562243
- Report Number(s):
- CONF-7605194-
- Conference Information:
- Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Journal Volume: 60:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
58 GEOSCIENCES
580100 -- Geology & Hydrology-- (-1989)
580201* -- Geophysics-- Seismology & Tectonics-- (1980-1989)
BRAZIL
CHEMISTRY
DATA ANALYSIS
DEVELOPING COUNTRIES
DRILL CORES
GEOCHEMISTRY
GEOLOGIC STRUCTURES
GEOLOGY
LATIN AMERICA
PETROGRAPHY
SEDIMENTARY BASINS
SOUTH AMERICA
STRATIGRAPHY
STRUCTURAL MODELS
TECTONICS
580100 -- Geology & Hydrology-- (-1989)
580201* -- Geophysics-- Seismology & Tectonics-- (1980-1989)
BRAZIL
CHEMISTRY
DATA ANALYSIS
DEVELOPING COUNTRIES
DRILL CORES
GEOCHEMISTRY
GEOLOGIC STRUCTURES
GEOLOGY
LATIN AMERICA
PETROGRAPHY
SEDIMENTARY BASINS
SOUTH AMERICA
STRATIGRAPHY
STRUCTURAL MODELS
TECTONICS