2014
DOI: 10.1002/2014gc005356
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Deciphering bottom current velocity and paleoclimate signals from contourite deposits in the Gulf of Cádiz during the last 140 kyr: An inorganic geochemical approach

Abstract: Contourites in the Gulf of C adiz (GC) preserve a unique archive of Mediterranean Outflow Water (MOW) variability over the past 5.3 Ma. In our study, we investigate the potential of geochemical data obtained by XRF scanning to decipher bottom current processes and paleoclimatic evolution at two different sites drilled during IODP Expedition 339 through contourites in the northern GC: Site U1387, which is bathed by the upper MOW core, and Site U1389, located more proximal to the Strait of Gibraltar. The lack of… Show more

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Cited by 109 publications
(103 citation statements)
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References 113 publications
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“…2; Table 2A and B) to the planktonic G. bulloides δ 18 O record from core MD01-2444 (Barker et al, 2011;Hodell et al, 2013). This approach follows Bahr et al (2014) who showed that conditions at the sea surface drive the Br content at Site U1387 which is located in vicinity and similar water depth as Site U1386 (Fig. 1C, Hernández-Molina et al, 2013).…”
Section: Age Controlmentioning
confidence: 70%
See 1 more Smart Citation
“…2; Table 2A and B) to the planktonic G. bulloides δ 18 O record from core MD01-2444 (Barker et al, 2011;Hodell et al, 2013). This approach follows Bahr et al (2014) who showed that conditions at the sea surface drive the Br content at Site U1387 which is located in vicinity and similar water depth as Site U1386 (Fig. 1C, Hernández-Molina et al, 2013).…”
Section: Age Controlmentioning
confidence: 70%
“…Bahr et al (2014) argued that the Zr/Al ratio mainly reflects bottom current velocity and accumulation of heavy minerals linked to MOW variability.…”
Section: Grain-size Analysesmentioning
confidence: 99%
“…MOW variability (Rogerson et al, 2005). Even though untreated weight percentages hold a bias, it has been shown for the last climatic cycle that weight percentages mirror major peaks in Zr / Al records, considered a reliable recorder of MOW flow strength variability (Bahr et al, 2014) and thus can be used to trace MOW intensity patterns (Kaboth et al, 2016(Kaboth et al, , 2017.…”
Section: Grain-size Analysesmentioning
confidence: 99%
“…This latitudinal shift might have occurred in concert with a more sluggish AMOC at least during the glacial periods, if not throughout the whole time interval (Bell et al, 2015). Colder and more arid background conditions in the Mediterranean Sea could foster a stronger MOW analogous to cold spells related to Heinrich events throughout the last climatic cycle (Bahr et al, 2014Kaboth et al, 2016). An intensification of MOW during Interval I would align with the increased δ 13 C gradient between Site U1389 and the Mediterranean Sea, suggesting a more vigorous MOW, which is also reflected by higher grain-size amplitudes compared to Interval II ( Fig.…”
Section: Did Mow Contribute To the Early Pleistocene Climate Transition?mentioning
confidence: 99%
“…Note that to account for the effect of lithology (e.g., density, porosity) or sediment surface irregularities on the XRF intensity values, we have normalised the raw total counts of a given element (e.g., Ca element in Fig. 7) to the total counts of all processed elements for this measurement position (Ca norm ; see Bahr et al, 2014 for details about this normalisation).…”
Section: X-ray Fluorescence (Xrf) Analysismentioning
confidence: 99%