Paleoproductivity and organic matter sources in Late Quaternary Lake Ontario

Hladyniuk, Ryan; Longstaffe, Frederick J.

doi:10.1016/j.palaeo.2015.05.026

Cited by 7 publications

(4 citation statements)

References 37 publications

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“…These differences could point to the onset of 663 monomictic conditions in ancient Lake Ontario, as has been inferred previously from the carbon isotopic compositions of these fauna (Hladyniuk and Longstaffe, 2015 Mexico. This caused the regional climate to shift from the cold and dry conditions 674 described earlier, to warm and dry (~8,300 to 6,800 cal [7,500 to 6,000 14 C] BP), and (Fig.…”

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confidence: 53%

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Oxygen-isotope variations in post-glacial Lake Ontario

Hladyniuk

Longstaffe

2016

Quaternary Science Reviews

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confidence: 53%

“…Information from previous Lake Ontario core studies was also used to help 312 construct and strengthen the age-depth model (Hladyniuk and Longstaffe, 2015). These shorter than 500 years.…”

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confidence: 99%

Oxygen-isotope variations in post-glacial Lake Ontario

Hladyniuk

Longstaffe

2016

Quaternary Science Reviews

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“…Paleoproductivity indicates the total amount of organic matter produced by creatures per unit area and time . Previous studies have shown that the enrichment of organic matter has a positive connection with paleoproductivity in the sedimentary period . Multiple geochemical proxies, including TOC contents and concentrations of phosphorus (P), barium (Ba), silica (Si), and copper (Cu), have been proposed to assess palaeoproductivity. , The P concentration is always linked to the supply of organic matter because P plays a significant role in the metabolic activities of organisms .…”

Section: Discussionmentioning

confidence: 99%

Paleoenvironment and Organic Matter Enrichment of the Middle Ordovician Marine Carbonates in the Ordos Basin of China: Evidence from Element Geochemistry

Liu

et al. 2021

ACS Earth Space Chem.

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The Middle Ordovician Majiagou marine carbonates in the Ordos Basin, China, are important natural gas exploration targets and potential gas source rocks. However, the hydrocarbon generation potential of marine carbonates is difficult to evaluate due to their old ages, high thermal maturities, and low total organic carbon (TOC) contents. The enrichments of organic matter deposited in the sedimentary period are of significance to the subsequent hydrocarbon generation process. Integrated petrology and geochemistry studies, including mineral and maceral contents, major and trace element contents, TOC, and organic carbon isotope signatures, were carried out on the Majiagou Formation. The detrital input, paleoproductivity, and preservation conditions of organic matter, which are essential control factors for the enrichment of organic matter, were discussed in detail. The results showed that sea level changes regulated the conditions for the enrichment of organic matter in the Majiagou sedimentary period. The third member of the Majiagou Formation (O2m3) resulted in high paleoproductivity (high Ba/Al, Cu/Al, and TOC values), terrigenous input (high Ti/Tiavergae shale and TCP/TOC values), and an anoxic (V/(V + Ni) > 0.6) and salty environment (high anhydrite contents) for the preservation of organic matter. Conversely, there is little organic matter input in the fourth member of the Majiagou Formation (O2m4) under the transgressive environment. Gypsum not only plays a potentially important role in the blooming of special organisms (halophilic archaea) but is also beneficial for the preservation of organic matter.

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“…A greater variation in climate with a more open environment is suggested by the sole representation of tamarack and higher ARWs, and it began with the opening of the North Bay–Ottawa River outlets of Lake Algonquin ca. 12.5 ka, which terminated any meltwater inflow into both ELE and Early Lake Ontario (ELO) and altered configuration and increased water temperatures of the lakes (Eschman and Karrow, 1985; Teller, 1987; Lowell et al, 1999; Dyke et al, 2003; Lewis et al, 2007, 2008; Anderson and Lewis, 2012; Hladyniuk and Longstaffe, 2016; Lewis and Anderson, 2017, 2019; Leydet et al, 2018; Figs. 3C and D and 4C and D).…”

Section: Proposed Role Of Lake-effect Processes On Climatementioning

confidence: 99%

A late-glacial lake-effect climate regime and abundant tamarack in the Great Lakes Region, North America

2022

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A unique regional climate progression, ca 14.2–11.5 cal ka BP, in the eastern Great Lakes region of North America is suggested by subfossil logs, high-resolution 14C dates, and established proxy records in New York, USA. The progression began with a northern boreal-type climate ca. 14.2–13.1 ka coeval with the expansion of Lake Iroquois, a transition to a southern boreal-type climate ~13.1–12.9 ka that coincided with the transition of Lake Iroquois into progressively lower lake levels, and a continuation of the southern boreal-type climate ~12.9–11.5 ka. These conditions and changes are evident in the tree rings and relative dominance of tamarack (Larix laricina) and spruce species (Picea spp.) plus the presence of black ash (Fraxinus nigra) as the only thermophilous species. Together they suggest variations in atmospheric moisture levels, surface winds, temperature extremes, and/or an enhanced seasonality over time. Here we propose that the evolution of the glacial Great Lakes and their interactions with ice sheets, meltwater, winds, and regional topography created a regional glacial lake-effect climate, 14.2–11.5 cal ka BP, that was opposite to the established warming Bølling-Allerød–cold Younger Dryas climate progression.

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Paleoproductivity and organic matter sources in Late Quaternary Lake Ontario

Cited by 7 publications

References 37 publications

Oxygen-isotope variations in post-glacial Lake Ontario

Oxygen-isotope variations in post-glacial Lake Ontario

Paleoenvironment and Organic Matter Enrichment of the Middle Ordovician Marine Carbonates in the Ordos Basin of China: Evidence from Element Geochemistry

A late-glacial lake-effect climate regime and abundant tamarack in the Great Lakes Region, North America

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