Triassic synthems of southern South America (southwestern Gondwana) and the Western Caucasus (the northern Neotethys), and global tracing of their boundaries

Ruban, Dmitry A.; Zerfass, Henrique; Pugatchev, Vladimir I.

doi:10.1016/j.jsames.2009.03.003

Cited by 16 publications

(8 citation statements)

References 46 publications

(73 reference statements)

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“…Moreover, both curves indicate a weakness of the long-term eustatic cyclicity in the Triassic. The latter observation is also supported indirectly by only partial global correlation of regional Triassic disconformities (Ruban et al, 2009). …”

Section: Triassic Long-term Eustatic Cycles and Their Hierarchymentioning

confidence: 83%

Mesozoic long-term eustatic cycles and their uncertain hierarchy

Ruban

2015

Geoscience Frontiers

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a b s t r a c tGlobal sea-level has changed in a cyclic manner through geologic history, but the regularities of these changes are yet to be fully understood. Despite certain (and sometimes significant) differences, the available Mesozoic eustatic curves permit the outlining of long-term eustatic cycles, which are provisionally defined as cycles recognizable at the stage level and higher. Interpretation of the Triassic eustatic curves indicates two orders of long-term cycles and a 1st-order sea-level rise throughout the entire period. The Jurassic eustatic curves imply cyclicity of one or two orders, and a 1st-order eustatic rise during the entire period is also evident. Most challenges are interpretations for the Cretaceous; two to four orders of long-term eustatic cycles can be established for this period. Generally, the hierarchy of the long-term eustatic cycles might have changed through the Mesozoic. If so, and if one considers differences of cycles of the same order between the periods of this era, it is difficult to apply "standard" hierarchical classifications to the documented cycles. The hypothetical uncertainty of the hierarchy of the Mesozoic long-term eustatic cycles is an important challenge for modern researchers.

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Section: Triassic Long-term Eustatic Cycles and Their Hierarchymentioning

confidence: 83%

Mesozoic long-term eustatic cycles and their uncertain hierarchy

Ruban

2015

Geoscience Frontiers

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“…Brazil should also be noted. However, when German specialists published only two multi-authored paper considering synthems (Lutz et al, 2005;Franz et al, 2014), Brazilian researchers were a bit more active (Danderfer et al, 2009;Ruban et al, 2009;Anjos Zerfass et al, 2013). Moreover, the latter resulted from international collaborative projects and dealt with synthems of very different age (Precambrian, Mesozoic, and Cenozoic).…”

Section: Resultsmentioning

confidence: 99%

“…The others focused on synthems (e.g., Giannandrea et al, 2006). Sometimes, synthems were used for inter-regional correlation (Ruban et al, 2009;Anjos Zerfass et al, 2013). There were theoretical works on synthems, including those advocating this stratigraphical approach (Walsh, 2004;Lutz et al, 2005;Carter, 2007).…”

Section: Discussionmentioning

confidence: 99%

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Worldwide application of synthem stratigraphy in the 21st century: a bibliographical survey

Ruban

2015

Proceedings of the Geologists' Association

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“…The basic unconformity-bounded unit is the synthem, as defined by Chang (1975) and adopted as a formal stratigraphic unit (Salvador, 1987(Salvador, , 1994. Synthems have remained in use until now (e.g., Sacchi et al, 1999;Ruban et al, 2009;Ielpi, 2012), because establishing synthems are complementary to the use of sequences (see Ruban, 2007;Ruban et al, 2009). Although modern changes in the very essence of sequence stratigraphy (Catuneanu, 2006;Catuneanu et al, 2009Catuneanu et al, , 2010Catuneanu et al, , 2011 may dictate further revision of the relationships between synthems and sequences (cf.…”

Section: Introductionmentioning

confidence: 99%

Cenozoic synthem stratigraphic architecture of the SE Brazilian shelf and its global eustatic context: evidence from the Pelotas Basin (offshore Brazil)

Zerfass¹,

Ruban²,

Chemale³

et al. 2013

Geologos

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The Pelotas Basin, located on the SE Brazilian shelf, has evolved since the Aptian. Stratigraphical data from the basin can be used for delineation of the unconformity-bounded units (synthems) on the shelf, which is a first step towards a full understanding of its stratigraphic architecture, evolution, and hydrocarbon potential. Hiatuses in the Cenozoic succession of the Pelotas Basin are established with both biostratigraphic (planktonic foraminifers and calcareous nannofossils) and isotopic (87Sr/86Sr) data. The seven recognised hiatuses are dated respectively as (1) Palaeocene (Danian- Thanetian), (2) Palaeocene/Eocene boundary (Thanetian-Ypresian), (3) Eocene (Ypresian-Lutetian), (4) Eocene-Oligocene (Lutetian-Rupelian), (5) early-late Oligocene (Rupelian-Chattian), (6) early Miocene (Aquitanian-Burdigalian), and (7) middle-late Miocene (Serravallian-Tortonian). These intervals between the hiatuses are correlated with those of the Santos and Campos Basins north from the Pelotas Basin. The breaks in sedimentation that these basins have in common occurred (1) at the Palaeocene-Eocene and (2) Eocene-Oligocene transitions, (3) in the early Miocene, and (4) in the middle-late Miocene. These main unconformities outline five synthems on the SE Brazilian shelf, viz. the SEBS-1 (Palaeocene), SEBS-2 (Eocene), SEBS-3 (Oligocene), SEBS-4 (early-middle Miocene) and SEBS-5 (late Miocene-Holocene). The above unconformities are correlated with those established in the Cenozoic sedimentary successions of different regions such as Western Siberia, Arabia, NW and NE Africa, peninsular India, S Australia, the Gulf of Mexico, NW Europe, and South Africa. The only regional unconformity, near the Oligocene/Miocene boundary, coincides with the nearly-global sedimentation break. The latter was resulted from a climatic event, i.e., the ‘Mi-1 glaciation’. Thus, a eustatic origin is supposed for this regional unconformity. The other regional unconformities also correspond to global sea-level falls (probably with an exception for the Palaeocene/Eocene surface), which suggests that global eustatic movements controlled the development of the regional synthem architecture.

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Triassic synthems of southern South America (southwestern Gondwana) and the Western Caucasus (the northern Neotethys), and global tracing of their boundaries

Cited by 16 publications

References 46 publications

Mesozoic long-term eustatic cycles and their uncertain hierarchy

Mesozoic long-term eustatic cycles and their uncertain hierarchy

Worldwide application of synthem stratigraphy in the 21st century: a bibliographical survey

Cenozoic synthem stratigraphic architecture of the SE Brazilian shelf and its global eustatic context: evidence from the Pelotas Basin (offshore Brazil)

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