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The Oligocene-Miocene stratigraphic evolution of the Majella carbonate platform (Central Apennines, Italy)
被引:57
|作者:
Brandano, Marco
[1
,2
]
Cornacchia, Irene
[1
]
Raffi, Isabella
[3
]
Tomassetti, Laura
[1
]
机构:
[1] Univ Roma La Sapienza, Dipartimento Sci Terra, P Aldo Moro 5, I-00185 Rome, Italy
[2] CNR, IGAG, Sez Sapienza, Dipartimento Sci Terra, P Aldo Moro 5, I-00185 Rome, Italy
[3] Univ G DAnnunzio, Dipartimento Ingn & Geol, Via Vestini 31, I-66013 Chieti, Italy
关键词:
Oligocene-Miocene;
Carbonate ramp;
Lithofacies;
Stratigraphic architecture;
Apennines;
EARLY CRETACEOUS CARBON;
MONTAGNA-DELLA-MAIELLA;
CALCAREOUS NANNOFOSSILS;
SEQUENCE STRATIGRAPHY;
LIMESTONE FORMATION;
MIDDLE MIOCENE;
ATTARD MEMBER;
SEA-LEVEL;
RAMP;
BIOZONATION;
D O I:
10.1016/j.sedgeo.2015.12.002
中图分类号:
P5 [地质学];
学科分类号:
0709 ;
081803 ;
摘要:
The stratigraphic architecture of the Bolognano Formation documents the evolution of the Majella carbonate platform in response to global and local changes that affected the Mediterranean area during the Oligocene-Miocene interval. The Bolognano Formation consists of a homoclinal ramp that developed in a warm, subtropical environment. Five different lithofacies associations have been identified: Lepidocyclina calcarenites, cherty manly limestones, bryozon calcarenites, hemipelagic marls and manly limestones, and Lithothamnion limestones. Each association corresponds to a single lithostratigraphic unit except for the Lepidocyclina calcarenites that form two distinct lithostratigraphic units (Lepidocyclina calcarenites 1 and 2). These six units reflect alternation of shallow-water carbonate production and drowning. Specifically, two of the three stages of shallow-water carbonate production regard the development of wide dune fields within the middle ramp, one stage dominated by red algae and a sea grass carbonate factory, whereas the two drowning phases are represented by manly cherty limestones and calcareous marls. A new biostratigraphic framework for Bolognano Formation is presented, based on high resolution analysis of calcareous nannofossil assemblages, which proved to be very useful for biostratigraphic constraints also in shallow-water settings. Using this approach, we have linked the first drowning phase, late Chattian-Aquitanian p.p. in age, to western Mediterranean volcanism and the Mi-1 event, and the second drowning phase, late Burdigalian-Serravallian in age, to the closure of the Indo-Pacific passage and the occurrence of the global Monterey event. These results permit a new deciphering, in terms of sequence stratigraphy, of the Bolognano Formation that is interpreted as a 2nd-order super-sequence that can be subdivided into 3 transgressive-regressive sequences. (C) 2015 Elsevier B.V. All rights reserved.
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页码:1 / 14
页数:14
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