The geneses of sedimentary organic matter with anomalous 13C-enriched isotopic composition in saline and freshwater lakes: A case study of lacustrine source rocks from Dongpu and Qikou sags, Bohai Bay Basin, eastern China

Chen, Zeya; Chen, Jianfa; Zhong, Ningning; Fei, Weiwei; Dong, Qingwei; Chen, Juan; Wang, Yangyang

doi:10.1016/j.marpetgeo.2020.104434

Cited by 11 publications

(6 citation statements)

References 58 publications

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“…Moreover, The HI values in the sediment corers of LM and HZ increased with the upcore profile, as shown in Figure S4 in Supporting Information . S2 has been used as a good proxy of algal organic matter because algal organic matter is more resistant than any other organic components during the early diagenesis process (D. Duan et al., 2015; Z. Chen et al., 2020). Thus, the increase of algal organic matter indicates the gradual increase of lacustrine primary productivity.…”

Section: Discussionmentioning

confidence: 99%

Effect of Aquatic Organic Matter and Global Warming on Accumulation of PAHs in Lakes, East China

et al. 2022

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In recent years, some researchers have begun to use sediment cores in lakes to study the impact of historical primary productivity on the migration and enrichment of pollutants, and then analyze the "biological pump" role of phytoplankton. Outridge et al. (2005Outridge et al. ( , 2007 used the Rock-Eval pyrolysis parameters to study the primary productivity history in Arctic lakes, while also analyzing the mercury concentration in the deposition cores. They found that climate warming for algae growth played the role of a "biological pump" on mercury. Stern et al. (2009) investigated some lacustrine systems and also found the effect of algal "biological pump" on mercury concentrations in the sediment cores while emphasizing that historical changes in primary productivity were mainly due to global temperature warming. Carrie et al. ( 2009) also found the effect of global warming on lake historical productivity, while increased algae acted as a "biological pump" for mercury, enhancing its accumulation in sediments and aquatic fish. Söderström et al. (2000) found higher polychlorinated biphenyl (PCB) and dichlorodiphenyltrichloroethane sedimentary fluxes and higher PCB concentrations in the surface sediments of eutrophic lakes than those of oligotrophic lakes, and most of the transport depended on phytoplankton. Jeremiason et al. (1999) selected a pair of lakes of similar size and catchment area for comparison, and also found

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Section: Discussionmentioning

confidence: 99%

Effect of Aquatic Organic Matter and Global Warming on Accumulation of PAHs in Lakes, East China

et al. 2022

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“…The residual marine brine of the Jiamuhe Formation under the Fengcheng Formation invaded [48], bringing abundant elements such as Fe, Mn, and Mg [49]. (2) Meanwhile, the various microorganisms in the Fengcheng Formation are beneficial for the enrichment of iron elements [17,24]. (3) Fe elements contributed with medium basic volcanic ash.…”

Section: Indicative Significance Of Iron Dolomite Ringmentioning

confidence: 99%

“…For example, mica interlaminar pores and albite pores formed under the action of alkaline fluids are good oil storage spaces. The diagenetic phenomena of alkaline diagenesis are diverse, including alkali lacustrine salt rocks [16], alkaline evaporative salt minerals [17], and quartz dissolution under the action of alkaline groundwater [18]. In addition, alkaline diagenesis may also provide a new explanation for the silicification of metal deposits, the origin of siliceous cementation, and the reddening and fragmentation of rocks [11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Diagenesis of the Permian Fengcheng Formation in the Mahu Sag, Junggar Basin, China

Bai,

Liang,

Dai

et al. 2023

Applied Sciences

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The Fengcheng Formation in the Mahu sag of the Junggar Basin was primarily composed of detritus, pyroclastic material, carbonates, and evaporites. In order to establish the diagenesis pathways of the Fengcheng Formation, some methods of polarized light microscope, SEM, CL, EPMA, LR, and fluid inclusion analysis were applied to discuss the diagenesis process. The results showed the following: (a) The formation of an alkaline lake was the result of the influence of a high concentration of sodium-rich sources, and it led to the preservation of alkaline minerals in the stratum. (b) After the sediments were buried, three mineral assemblages were formed in the Fengcheng Formation, which are carbonate mineral assemblages (i.e., calcite + ferreous dolomite), reedmergnerite and carbonate mineral assemblages (i.e., reedmergnerite + calcite + ferreous dolomite), and reedmergnerite and alkaline mineral assemblages (i.e., reedmergnerite + shortite + trona), respectively. (c) According to the homogenization temperature of reedmergnerite primary fluid inclusions, the alkaline diagenesis of Fengcheng Formation was divided into an early stage (≤100 °C) and a middle stage (>100 °C), respectively. The earlier stage is marked by the formation of ferrous saddle dolomite, quartz dissolution, and the agglutination of laumontite. These processes occurred under normal burial conditions. The latter is marked by the reedmergnerite’s appearance, which is correlated with the deep hydrothermal activity controlled by faults. (d) Based on sedimentary and diagenetic factors, including climate, provenance, diagenetic surroundings, and the action of subsurface fluid, the alkaline deposition-diagenesis model for shale series in four stages of the Fengcheng Formation was established.

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“…S2 represents higher molecular weight algae-derived aliphatic hydrocarbons. It has been applied in the pyrolysis of algal macromolecular organic matter because this material degrades less easily than other organic components in early diagenesis (Chen et al, 2020;Duan et al, 2015). Moreover, photosynthesis could fractionate the isotopic values of CO 2 .…”

Section: Om Input and Variation In The Sediment Coresmentioning

confidence: 99%

“…Algae prefer lighter CO 2 when high biological productivity and dissolved CO 2 are insufficient. Plankton consumes more bicarbonate ions in water because the carbon isotopic composition of bicarbonate is 7-10‰ heavier than that of dissolved CO 2 (Chen et al, 2020), which leads to enrichment of 13 C in these organisms.…”

Section: Om Input and Variation In The Sediment Coresmentioning

confidence: 99%

Historical changes of phytoplankton community in Fuxian and Dianchi lakes recorded by alkyl diols and sterol biomarkers

Wan

Zhuo

Qiao

et al. 2022

Preprint

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We investigated historical changes in temperature and phytoplankton in Fuxian Lake (FX) and Dianchi Lake (DC), two plateau lakes in Southwest China. We detected sterols and alkyl diols as algal biomarkers (Dinoflagellates, Diatoms, Eustigmatophytes, Cyanobacteria, and Chlorophyta) in the sediment cores by using GC-MS. We characterized sedimentary organic matter (SOM) via C-13 isotope and C/N ratio, and Rock-Eval analysis to obtain total organic carbon (TOC), S2, the hydrogen index (HI), refractory carbon (RC), and nutrient status such as total phosphorus (TP) and total nitrogen (TN) in the sediment cores. The results showed that the sedimentation rates measured by 210 Pb dating ranged from 0.02 to 0.30 g cm -2 yr -1 and 0.07 g cm -2 yr -1 in FX and DC, respectively. The Bayesian isotope mixing model indicated that organic matter from plankton was the main contributor of organic matter in FX and DC and, its contents was gradually increasing . Primary productivity derived from the S2 and HI parameters showed an increasing trend in FX and DC. Cyanobacteria and Chlorophyta were the two dominant phyla in the two lakes. Algal growth was controlled primarily by temperature and nutrient availability. Principal component analysis (PCA) and multiple linear regression analysis showed that the major factors controlling the historical change in phytoplankton growth were TN and temperature in FX and DC. Historical changes in the phytoplankton community in Fuxian andDianchi lakes recorded based on alkyl diols and sterol biomarkers

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The geneses of sedimentary organic matter with anomalous 13C-enriched isotopic composition in saline and freshwater lakes: A case study of lacustrine source rocks from Dongpu and Qikou sags, Bohai Bay Basin, eastern China

Cited by 11 publications

References 58 publications

Effect of Aquatic Organic Matter and Global Warming on Accumulation of PAHs in Lakes, East China

Effect of Aquatic Organic Matter and Global Warming on Accumulation of PAHs in Lakes, East China

Diagenesis of the Permian Fengcheng Formation in the Mahu Sag, Junggar Basin, China

Historical changes of phytoplankton community in Fuxian and Dianchi lakes recorded by alkyl diols and sterol biomarkers

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