000126435 001__ 126435
000126435 005__ 20240705134208.0
000126435 0247_ $$2doi$$a10.1029/2022PA004565
000126435 0248_ $$2sideral$$a133860
000126435 037__ $$aART-2023-133860
000126435 041__ $$aeng
000126435 100__ $$aGastaldello, M.E.
000126435 245__ $$aThe late Miocene-early Pliocene biogenic bloom: an integrated study in the Tasman sea
000126435 260__ $$c2023
000126435 5060_ $$aAccess copy available to the general public$$fUnrestricted
000126435 5203_ $$aThe Late Miocene-Early Pliocene Biogenic Bloom (∼9–3.5 Ma) was a paleoceanographic phenomenon defined by anomalously high accumulations of biological components at multiple open ocean sites, especially in certain regions of the Indian, and Pacific oceans. Its temporal and spatial extent with available information leaves fundamental questions about driving forces and responses unanswered. In this work, we focus on the middle part of the Biogenic Bloom (7.4–4.5 Ma) at International Ocean Discovery Program Site U1506 in the Tasman Sea, where we provide an integrated age model based on orbital tuning of the Natural Gamma Radiation, benthic foraminiferal oxygen isotopes, and calcareous nannofossil biostratigraphy. Benthic foraminiferal assemblages suggest changes in deep water oxygen concentration and seafloor nutrient supply during generally high export productivity conditions. From 7.4 to 6.7 Ma, seafloor conditions were characterized by episodic nutrient supply, perhaps related to seasonal phytoplankton blooms. From 6.7 to 4.5 Ma, the regime shifted to a more stable interval characterized by eutrophic and dysoxic conditions. Combined with seismic data, a regional change in paleoceanography is inferred at around 6.7 Ma, from stronger and well-oxygenated bottom currents to weaker, oxygen-depleted bottom currents. Our results support the hypothesis that the Biogenic Bloom was a complex, multiphase phenomenon driven by changes in ocean currents, rather than a single uniform period of sustained sea surface water productivity. Highly resolved studies are thus fundamental to its understanding and the disentanglement of local, regional, and global imprints.
000126435 536__ $$9info:eu-repo/grantAgreement/ES/MICINN-FEDER/PID2019-105537RB-I00
000126435 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000126435 592__ $$a1.587$$b2023
000126435 593__ $$aAtmospheric Science$$c2023$$dQ1
000126435 593__ $$aPaleontology$$c2023$$dQ1
000126435 593__ $$aOceanography$$c2023$$dQ1
000126435 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000126435 700__ $$aAgnini, C.
000126435 700__ $$aWesterhold, T.
000126435 700__ $$aDrury, A.J.
000126435 700__ $$aSutherland, R.
000126435 700__ $$aDrake, M. K.
000126435 700__ $$aLam, A.R.
000126435 700__ $$aDickens, G.R.
000126435 700__ $$aDallanave, E.
000126435 700__ $$aBurns, S.
000126435 700__ $$0(orcid)0000-0002-8801-9544$$aAlegret, L.$$uUniversidad de Zaragoza
000126435 7102_ $$12000$$2655$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Paleontología
000126435 773__ $$g38, 4 (2023), e2022PA004565 [21 pp.]$$pPaleoceanogr. paleoclimatol.$$tPaleoceanography and Paleoclimatology$$x2572-4525
000126435 8564_ $$s4682312$$uhttps://zaguan.unizar.es/record/126435/files/texto_completo.pdf$$yVersión publicada
000126435 8564_ $$s3296955$$uhttps://zaguan.unizar.es/record/126435/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000126435 909CO $$ooai:zaguan.unizar.es:126435$$particulos$$pdriver
000126435 951__ $$a2024-07-05-12:50:59
000126435 980__ $$aARTICLE