The Guasare Formation (Paleocene), Maracaibo Basin: A carbonate or a terrigeneous play?
Journal Article
·
· AAPG Bulletin
OSTI ID:421112
- Intevep, S.A., Caracas (Venezuela)
- Univ. of Calgary, Alberta (Canada)
The Guasare Formation located in the Lama Field, Maracaibo Basin, represents a mixed carbonate-terrigenous clastic succession. We have identified 10 lithofacies in this succession: pelecypod floatstones-rudstones; black mudstones; grey siltstones; medium grained sandstones; laminated fine grained sandstones; rippled fine grained sandstones; bioturbated fine grained sandstones; calcareous massive sandstones; interbedded mudstones and sandstones; and mudstone clast conglomerates. These lithofacies represent coastal plain, nearshore, tide and storm influenced conditions during sedimentation, which resulted in a close temporal and spatial association of distinct carbonate and siliciclastic facies. Environmental reconstruction indicates that accumulation took place in a dynamic delta setting where delta lobe progradation, abandonment, transgression and renewed progradation were the dominant controlling factors on sedimentation. The formation typically has been visualized as a carbonate platform deposit. Our work instead illustrates that in the Lama Field this formation is a mixed carbonate-terrigenous succession dominated by brackish water to marine depositional systems.
- OSTI ID:
- 421112
- Report Number(s):
- CONF-9609255--
- Journal Information:
- AAPG Bulletin, Journal Name: AAPG Bulletin Journal Issue: 8 Vol. 80; ISSN 0149-1423; ISSN AABUD2
- Country of Publication:
- United States
- Language:
- English
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