Details
| Original language | English |
|---|---|
| Pages (from-to) | 78-86 |
| Number of pages | 9 |
| Journal | Cretaceous research |
| Volume | 29 |
| Issue number | 1 |
| Publication status | Published - Feb 2008 |
| Externally published | Yes |
Abstract
Pipe-like structures filled with massive and brecciated Fe-rich dolomites occur within a 5-6 m sequence of otherwise horizontal, millimetre-laminated limestones of the Nova Olinda Member of the Crato Formation (Aptian, Lower Cretaceous) of north east Brazil. The pipe-fills predate compaction, contain hydro-brecciated host strata, developed penecontemporaneously with a carbonate laminite, and may represent methane seeps. Such seeps may have developed above buried topographic highs as fluids emanating from deeper strata migrated along buried discontinuities such as the basement/Cretaceous unconformity and buried faults in the basement.
Keywords
- Brazil, Crato Formation, Dolomite, Early Cretaceous, Submarine seep
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Palaeontology
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In: Cretaceous research, Vol. 29, No. 1, 02.2008, p. 78-86.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Dolomite pipes in the Crato Formation fossil lagerstätte (Lower Cretaceous, Aptian), of northeastern Brazil
AU - Martill, David M.
AU - Loveridge, Robert F.
AU - Heimhofer, Ulrich
N1 - Funding Information: Dr Paul Selden is thanked for help with fieldwork. Geoff Long produced the thin sections. Assistance while in Brazil from Dr Artur Andrade (DNPM), Dr André Herzog (URCA) and Dr Paulo Brito (UERJ) is gratefully acknowledged. Thanks to Dr Jim Hendry (Portsmouth) for helpful discussion and Derek Weights (Portsmouth) for his enthusiasm in analysing our samples. Financial support from DFG project HE4457/1-1 to UH is gratefully acknowledged. Dr Jon Ineson and an anonymous referee provided many helpful comments.
PY - 2008/2
Y1 - 2008/2
N2 - Pipe-like structures filled with massive and brecciated Fe-rich dolomites occur within a 5-6 m sequence of otherwise horizontal, millimetre-laminated limestones of the Nova Olinda Member of the Crato Formation (Aptian, Lower Cretaceous) of north east Brazil. The pipe-fills predate compaction, contain hydro-brecciated host strata, developed penecontemporaneously with a carbonate laminite, and may represent methane seeps. Such seeps may have developed above buried topographic highs as fluids emanating from deeper strata migrated along buried discontinuities such as the basement/Cretaceous unconformity and buried faults in the basement.
AB - Pipe-like structures filled with massive and brecciated Fe-rich dolomites occur within a 5-6 m sequence of otherwise horizontal, millimetre-laminated limestones of the Nova Olinda Member of the Crato Formation (Aptian, Lower Cretaceous) of north east Brazil. The pipe-fills predate compaction, contain hydro-brecciated host strata, developed penecontemporaneously with a carbonate laminite, and may represent methane seeps. Such seeps may have developed above buried topographic highs as fluids emanating from deeper strata migrated along buried discontinuities such as the basement/Cretaceous unconformity and buried faults in the basement.
KW - Brazil
KW - Crato Formation
KW - Dolomite
KW - Early Cretaceous
KW - Submarine seep
UR - http://www.scopus.com/inward/record.url?scp=39249085743&partnerID=8YFLogxK
U2 - 10.1016/j.cretres.2007.04.007
DO - 10.1016/j.cretres.2007.04.007
M3 - Article
AN - SCOPUS:39249085743
VL - 29
SP - 78
EP - 86
JO - Cretaceous research
JF - Cretaceous research
SN - 0195-6671
IS - 1
ER -