The carbonate profile of two recent Ionian Sea cores: Evidence that the sedimentation rate is constant over the last millennia

Journal Article · Mon Oct 01 00:00:00 EDT 1990 · Geophysical Research Letters (American Geophysical Union); (USA)

DOI:https://doi.org/10.1029/GL017i011p01937· OSTI ID:5599062

Castagnoli, G C; Bonino, G; Caprioglio, F; Provenzale, A; Serio, M; Guang-Mei, Zhu ^[1]

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1. Instituto di Comsogeofisica del C.N.R., Torino (Italy) Istituto di Fisica Generale dell'Universiat', Torino (Italy)

The authors confirm and extend the results previously reported on the carbonate profile of the GT14 Ionian Sea core (Cini Castagnoli et al., 1990). A second, much longer core (2.81 meters) named GT89/3, has been taken about 1 km apart from the previous one. The carbonate profiles of the two cores are impressively similar; the details of the CaCO{sub 3} variations in the two sediments match on the scale of the sampling interval {Delta}d = 2.5 mm used for both cores. The authors show that {Delta}d corresponds to the mud deposited in a time interval {Delta}t = 3.87 {plus minus} 0.04 years, a value which is constant throughout the entire length of the cores. This precision is achieved by the tephroanalysis of the two cores. In this approach the markers of well-known historical eruptions in the Vesuvius area are recognized (Pompei, AD 79, Pollena, AD 472, Ischia, AD 1301), providing a precise dating which accurately tunes that obtained by the radiometric method. The correlation between the carbonate profile of the GT14 core and the tree-ring radiocarbon record has been discussed in (Cini Castagnoli et al., 1990); here the authors extend these results and show that the same correlation holds at least up to 1690 BC. Due to the longer length of the GT89/3 time series, they also show that three periodic components at about 206 yr, 228 yr and 179 yr may now be resolved in the carbonate series, in close agreement with the results already found for the radiocarbon record.

• OSTI ID: 5599062
• Journal Information: Geophysical Research Letters (American Geophysical Union); (USA), Vol. 17:11, Issue 11; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
MEDITERRANEAN SEA
SEDIMENTS
DEPOSITION
AGE ESTIMATION
CALCIUM CARBONATES
CARBON 14
CARBONATE ROCKS
CORRELATIONS
DRILL CORES
GEOLOGIC STRATA
ISOTOPE DATING
TIME-SERIES ANALYSIS
VOLCANIC ROCKS
ALKALINE EARTH METAL COMPOUNDS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBON ISOTOPES
CARBONATES
EVEN-EVEN NUCLEI
GEOLOGIC STRUCTURES
IGNEOUS ROCKS
ISOTOPES
LIGHT NUCLEI
MATHEMATICS
NUCLEI
OXYGEN COMPOUNDS
RADIOISOTOPES
ROCKS
SEAS
SEDIMENTARY ROCKS
SURFACE WATERS
YEARS LIVING RADIOISOTOPES
580000* - Geosciences