Evaluating the Effect of Marine Diagenesis on Late Miocene Pre-Evaporitic Sedimentary Successions of Eastern Mediterranean Sea

Antonarakou, Assimina; Kontakiotis, George; Vasilatos, Charalampos; Besiou, Eva; Zarkogiannis, Stergios D.; Drinia, Hara; Mortyn, P. Graham; Tsaparas, Nikolaos; Makri, Panayota; Karakitsios, V.

doi:10.1088/1755-1315/221/1/012051

Cited by 16 publications

(12 citation statements)

References 43 publications

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“…The isotopic composition of the bulk sediments was focused on investigating the corresponding depositional environment. Further constraints on the impact of MSC climate changes on studied sedimentary archive by triggering sea level fluctuations (Capella et al 2019), variations in water column characteristics (e.g., temperature, salinity, stratification) (Karakitsios et al 2017a;Moissette et al 2018;Kontakiotis et al 2019), productivity and preservation in organic matter changes (Vasiliev et al 2019), diagenetic alteration (Antonarakou et al 2019), and increasing influxes of terrestrial organic matter (Mayser et al 2017;Karakitsios et al 2017b; Kontakiotis et al 2020a) that are here discussed will contribute significantly to our knowledge of this delicate system. All this information is also used to investigate the possible mechanisms of source-rock deposition and the petroleum systems onshore Zakynthos Island, which may provide important prospect for the Neogene petroleum concern of western Greece and the broader area of the eastern Mediterranean Sea.…”

Section: N Ionian Seamentioning

confidence: 91%

Integrated isotopic and organic geochemical constraints on the depositional controls and source rock quality of the Neogene Kalamaki sedimentary successions (Zakynthos Island, Ionian Sea)

et al. 2020

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This study investigates the oxygen and carbon (δ 18 O, δ 13 C) stable isotope ratios, as well as the organic geochemical features of the 146-m-thick composite Kalamaki section located in the southwest margin of the Hellenic Fold and Thrust Belt (Zakynthos Island). The section includes Late Miocene-Pliocene pre-evaporitic, evaporitic, and post-evaporitic deposits. The obtained bulk geochemical data (Rock-Eval II, bitumen extraction, and fractionation) and biomarker compositions indicate poor-fair source-rock potential predominantly promising for gas production. TOC values indicate the presence of samples that might be of slight interest (0.50-0.95%) in the evaporitic interval and samples that are worthy of further investigation (up to 1.31%) in the pre-evaporitic sequence. The organic matter type (type III kerogen), along with the presence of plant remains (leaves) in the studied deposits reflect the mainly terrestrial origin of the organic material. T max and Production Index values further indicate that most of the sediments (138 out of 195 samples) are immature for oil generation and were not under high temperature conditions during burial, whereas 29 of them correspond to the mature oil stage. Oil generation requires deeper burial, which may have occurred offshore in the Ionian Sea. A marine paleoenvironment is indicated that received organic material from both marine and terrigenous sources. Isotopic values imply influence of continental freshwater inputs in a high salinity, evaporative depositional setting. Furthermore, our findings provide evidence that the climate has favored the development of these source rocks by triggering relative sea-level fall, which in turn enhanced the preservation of organic matter by increasing seawater salinity and suppressing carbonate deposition.

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Section: N Ionian Seamentioning

confidence: 91%

Integrated isotopic and organic geochemical constraints on the depositional controls and source rock quality of the Neogene Kalamaki sedimentary successions (Zakynthos Island, Ionian Sea)

et al. 2020

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“…Late Miocene sea surface temperature (SST) records are sparse, and only one deals with the Mediterranean (Tzanova et al, ). Foraminifera stable oxygen isotope and Mg/Ca proxies suffer from biases (preservation, diagenesis, and salinity) in the Mediterranean realm, which render them insufficient for SST reconstructions (Antonarakou, Kontakiotis, Zarkogiannis, et al, , Antonarakou, Kontakiotis, Vasilatos, et al, ; Kontakiotis et al, , Kontakiotis, Mortyn, et al, , Kontakiotis et al, ). Alkenone paleothermometry (U K′ 37 ‐index‐based SST) appears more suitable/less biased in the Mediterranean Sea (Herbert et al, ) although those alkenones were produced by extinct species of haptophytes (Athanasiou et al, ; Herbert et al, ; Tzanova et al, ).…”

Section: Introductionmentioning

confidence: 99%

Large Sea Surface Temperature, Salinity, and Productivity‐Preservation Changes Preceding the Onset of the Messinian Salinity Crisis in the Eastern Mediterranean Sea

Vasiliev

Karakitsios

Bouloubassi

et al. 2019

Paleoceanog and Paleoclimatol

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The Messinian Salinity Crisis (MSC; 5.97–5.33 Ma) is an enigmatic episode of paleoceanographic change, when kilometer‐thick evaporite units were deposited in the Mediterranean basin. Here we use geochemical (biomarker and isotope) data to reconstruct sea surface temperature, salinity, and productivity‐preservation changes in the Mediterranean basin just before the MSC. The proxy data indicate that the Mediterranean Sea was significantly saltier and colder between 6.415 and 6.151 Ma, than between 6.151 and 5.971 Ma. Salinity decrease at 6.151 Ma seems to be a relatively fast event just preceding the inception of a warming phase that lasted almost uninterrupted until the MSC onset. The water exchange with the Paratethys could have caused, along with the African rivers, an increased freshwater supply, resulting in normal marine Mediterranean waters between 6.151 and 5.971 Ma, despite the severe restriction of marine connections with the Atlantic at that time. Sea surface temperature changes determined a sharp drop in productivity and/or preservation of organic matter, marked by deposition of calcareous marls. Productivity and preservation were relatively high and constant until 6.01 Ma. Afterward, increased influx of terrestrial organic matter and probably enhanced water column stratification prevailed. Around 5.971 Ma, modifications in aquatic versus terrestrially derived biomarkers indicate changes in organic matter influx at the MSC onset.

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“…The quan ti ta tive dis tri bu tion of plank tonic foraminifera from the LGM to the pres ent dis plays a suc ces sion of microfaunal as sem blages (biozones) char ac ter iz ing the pro gres sively chang ing sur face wa ter en vi ron ment. In such mar ginal bas ins, the suc ces sive fau nal zones can be in di cated as ecozones, because the ma jor ity of the spe cies are sen si tive in di ca tors of past en vi ron men tal changes with am pli fied sig nals (Drinia and Antonarakou, 2003;Antonarakou et al, 2007Antonarakou et al, , 2018Antonarakou et al, , 2019Drinia et al, 2007Drinia et al, , 2008Drinia et al, , 2016Kontakiotis, 2012Kontakiotis, , 2016Kontakiotis et al, 2013Kontakiotis et al, , 2016aKontakiotis et al, , b, 2017Fenton et al, 2016;Karakitsios et al, 2017a, b). The eco log i cal di ver gence between the spe cies (Hemleben et al, 1989;Rohling et al, 1993), even be tween dif fer ent morphotypes of the same spe cies (Antonarakou et al, 2015;Kontakiotis et al, 2017), de ter mined by dif fer ent con trol ling fac tors (e.g., depth hab i tats, growth op timum/stressed con di tions, pro duc tiv ity, strat i fi ca tion, near-/offshore-con di tions), in com bi na tion with their dif fer ent test morpho logies (e.g., re lated to shell shape and size, thick ness, in ner po ros ity and pore sur face dis tri bu tion; Morard et al, 2009;Kontakiotis et al, 2017), con trol di rectly their dis tri bu tion pat tern and re flect the re gional cli mate vari abil ity (Marcott et al, 2013).…”

Section: Discussion Eco-biostratigraphic Approach In Subtropical Margmentioning

confidence: 99%

Eco-biostratigraphic advances in late Quaternary geochronology and palaeoclimate: the marginal Gulf of Mexico analogue

Antonarakou

Kontakiotis

Karageorgis

et al. 2019

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As so ci ate ed i tor: Wojciech Granoszewski This study com bines high-res o lu tion plank tonic foraminiferal eco-biostratigraphy and palaeoclimatic data from the high-sed imen ta tion-rate core JPC-26 from the north west ern mar gin of the Gulf of Mex ico (GoM). The eco-biozones rec og nized (GOMPFE1-12) be ing cor re lated with pub lished Mg/Ca-based sea sur face tem per a tures. This up dated palaeoclimatic and strati graphic ref er ence re cord fa cil i tates cor re la tions with the Green land ice core events and their cli ma tic re la tion ships, and also pro vides a solid strati graphic frame work for cor re la tions with other palaeoclimatic and palaeoceanographic re cords in the circum-GOM/Ca rib bean re gion. This multidisciplinary ap proach un der lines the util ity of sup port ing con ven tional dat ing meth od ol o gies with dif fer ent con straints, and fur ther re veals a pow er ful tool for re li ably cor re lat ing ma rine re cords be tween com pa ra ble deep-sea mar ginal set tings and co eval se quences of this re gion. Key words: in te grated stra tig ra phy, Late Glacial-Holocene tran si tion, plank tonic foraminiferal eco-bioevents, deep-sea sed imen tary cor re la tions, cli mate vari abil ity, palaeoceanography.

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Evaluating the Effect of Marine Diagenesis on Late Miocene Pre-Evaporitic Sedimentary Successions of Eastern Mediterranean Sea

Cited by 16 publications

References 43 publications

Integrated isotopic and organic geochemical constraints on the depositional controls and source rock quality of the Neogene Kalamaki sedimentary successions (Zakynthos Island, Ionian Sea)

Integrated isotopic and organic geochemical constraints on the depositional controls and source rock quality of the Neogene Kalamaki sedimentary successions (Zakynthos Island, Ionian Sea)

Large Sea Surface Temperature, Salinity, and Productivity‐Preservation Changes Preceding the Onset of the Messinian Salinity Crisis in the Eastern Mediterranean Sea

Eco-biostratigraphic advances in late Quaternary geochronology and palaeoclimate: the marginal Gulf of Mexico analogue

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