The Latest Miocene–Early Pliocene biogenic bloom: a revised Indian Ocean perspective

Dickens, Gerald R.; Owen, Robert M.

doi:10.1016/s0025-3227(99)00057-2

Cited by 138 publications

(170 citation statements)

References 36 publications

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“…Similar observations have been made at other sites beneath upwelling regions of the Indian and Paci¢c oceans (e.g. Van Andel et al, 1975;Peterson et al, 1992;Berger et al, 1993;Farrell et al, 1995;Dickens and Owen, 1999). Records of CaCO 3 , Ba, opal, and organic carbon accumulation at ODP site 850 in the eastern Equatorial Paci¢c (Schroeder et al, 1997) are especially pertinent for comparison.…”

Section: The Timing Of Enhanced Productivitysupporting

confidence: 69%

“…9 and 3.8 Ma. This is broadly coincident with the timing of enhanced productivity at other upwelling regions in the Indian and Paci¢c oceans (Dickens and Owen, 1999). There is a distinct o¡set between the timing of maximum CaCO 3 MARs and maximum Ca/Ti, Ba/Ti and Al/Ti ratios at site 590.…”

Section: The Timing Of Enhanced Productivitysupporting

confidence: 55%

“…CaCO 3 , SiO 2 , P) accumulated at very high rates beneath upwelling zones throughout the Indian and Paci¢c oceans (e.g. Van Andel et al, 1975;Peterson et al, 1992;Delaney and Filippelli, 1994;Dickens and Owen, 1999) and perhaps the Atlantic Ocean (Diester-Haass et al, 2002). This widespread increase in export production, termed the 'biogenic bloom', relates to an elevated supply of nutrients to the ocean, a major redistribution of nutrients within the ocean, or both (Delaney and Filippelli, 1994;Farrell et al, 1995;Owen, 1996, 1999;Hermoyian and Owen, 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Berggren et al, 1985Berggren et al, , 1995b. Many key records across the time interval of interest are therefore not calibrated to a similar or current time scale (Dickens and Owen, 1999). Second, the timing and magnitude of the Chron C3AR carbon shift is problematic.…”

Section: Introductionmentioning

confidence: 99%

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Coupled productivity and carbon isotope records in the southwest Pacific Ocean during the late Miocene–early Pliocene biogenic bloom

Grant

Dickens

2002

Palaeogeography, Palaeoclimatology, Palaeoecology

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Biogenic components of sediment accumulated at high rates beneath frontal zones of the Indian and Pacific oceans during the late Miocene and early Pliocene. The N 13 C of bulk and foraminiferal carbonate also decreased during this time interval. Although the two observations may be causally linked, and signify a major perturbation in global biogeochemical cycling, no site beneath a frontal zone has independent records of export production and N 13 C on multiple carbonate phases across the critical interval of interest. Deep Sea Drilling Project (DSDP) site 590 lies beneath the Tasman Front (TF), an eddy-generating jetstream in the southwest Pacific Ocean. To complement previous N 13 C records of planktic and benthic foraminifera at this location, late Neogene records of CaCO 3 mass accumulation rate (MAR), Ca/Ti, Ba/Ti, Al/Ti, and of bulk carbonate and foraminiferal N 13 C were constructed at site 590. The N 13 C records include bulk sediment, bulk sediment fractions ( 6 63 Wm and 5^25 Wm), and the planktic foraminifera Globigerina bulloides, Globigerinoides sacculifer (with and without sac), and Orbulina universa. Using current time scales, CaCO 3 MARs, Ca/Ti, Al/Ti and Ba/Ti ratios are two to three times higher in upper Miocene and lower Pliocene sediment relative to overlying and underlying units. A significant decrease also occurs in all N 13 C records. All evidence indicates that enhanced export production^the 'biogenic bloom'^extended to the southwest Pacific Ocean between ca. 9 and 3.8 Ma, and this phenomenon is coupled with changes in N 13 C^the 'Chron C3AR carbon shift'. However, CaCO 3 MARs peak ca. 5 Ma whereas elemental ratios are highest ca. 6.5 Ma; foraminiferal N 13 C starts to decrease ca. 8 Ma whereas bulk carbonate N 13 C begins to drop ca. 5.6 Ma. Temporal discrepancies between the records can be explained by changes in the upwelling regime at the TF, perhaps signifying a link between changes in ocean^atmosphere circulation change and widespread primary productivity. ß

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Section: The Timing Of Enhanced Productivitysupporting

confidence: 69%

Section: The Timing Of Enhanced Productivitysupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Coupled productivity and carbon isotope records in the southwest Pacific Ocean during the late Miocene–early Pliocene biogenic bloom

Grant

Dickens

2002

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…CC BY 4.0 License. between 9.0 to 3.5 Ma and promote the high quantities of carbonates deposit at the seafloor (Gupta et al, 2004;Dickens and Owen, 1999).…”

Section: Geological Settingmentioning

confidence: 99%

Endolithic Boring Enhance the Deep-sea Carbonate Lithification on the Southwest Indian Ridge

Peng

Chen

et al. 2018

Preprint

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Abstract. Deep-sea carbonates represent an important type of sedimentary rock due to their effect on the composition of upper oceanic crust and their contribution to deep-sea geochemical cycles. However, the lithification of deep-sea carbonates at the seafloor has remained a mystery for many years. A large lithified carbonate area, characterized by thriving benthic faunas and tremendous amount of endolithic borings, was discovered in 2008, blanketed on the seafloor of ultraslow 10 spreading Southwest Indian Ridge (SWIR). Macrofaunal inhabitants including echinoids, polychaetes, gastropods as well as crustaceans, are abundant in the sample. The most readily apparent feature of the sample is the localized enhancement of density around the borings. The boring features of these carbonate rocks and factors that may enhance deep-sea carbonate lithification are reported. We suggest that active boring may trigger the dissolution of the original calcite and thus accelerate deep-sea carbonate lithification on mid-ocean ridges. Our study reports an unfamiliar phenomenon of non-burial carbonate 15 lithification and interested by the observation that it is often associated with boring feature. These carbonate rocks may provide a novel mechanism for deep-sea carbonate lithification at the deep-sea seafloor and also illuminate the geological and biological importance of deep-sea carbonate rocks on mid-ocean ridges.

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Carbon and oxygen isotopes of bulk carbonate in sediment deposited beneath the eastern equatorial Pacific over the last 8 million years

et al. 2015

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To improve the understanding and utility of bulk carbonate stable carbon and oxygen isotope measurements, we examine sediment from cores in the eastern equatorial Pacific that span the last 8 Ma. O, higher sedimentation rates, and low content of coarse material suggest intensified wind-driven upwelling and enhanced primary productivity along the Pacific equator between 8.0 and 4.4 Ma, although a full understanding of bulk carbonate records will require extensive future work.

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The Latest Miocene–Early Pliocene biogenic bloom: a revised Indian Ocean perspective

Cited by 138 publications

References 36 publications

Coupled productivity and carbon isotope records in the southwest Pacific Ocean during the late Miocene–early Pliocene biogenic bloom

Coupled productivity and carbon isotope records in the southwest Pacific Ocean during the late Miocene–early Pliocene biogenic bloom

Endolithic Boring Enhance the Deep-sea Carbonate Lithification on the Southwest Indian Ridge

Carbon and oxygen isotopes of bulk carbonate in sediment deposited beneath the eastern equatorial Pacific over the last 8 million years

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