Inferring centennial terrigenous input for Patos Lagoon, Brazil: the world's largest choked coastal lagoon

Bueno, Carolina; Figueira, Rubens César Lopes; Ivanoff, Michel Doeppre; Toldo, Elírio E.; Ferreira, Paulo Martins; Fornaro, L.; García-Rodríguez, Felipe

doi:10.1007/s10933-021-00197-7

Cited by 8 publications

(1 citation statement)

References 31 publications

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“…This means that the quality of the oil shales is neither controlled by detrital minerals nor by clay minerals. The elements Ti and Al are relatively stable during the transportation and depositional processes and can indicate the input of terrigenous detrital input [100][101][102]. The low-quality oil shales have the highest average Ti and Al amounts, while the high-quality oil shales have the lowest (Table 3; Figure 6).…”

Section: Controlling Factors On Oil Shale Qualitymentioning

confidence: 99%

A Comparative Study of Different Quality Oil Shales Developed in the Middle Jurassic Shimengou Formation, Yuqia Area, Northern Qaidam Basin, China

et al. 2022

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Oil shales are developed in the Shale Member of the Middle Jurassic Shimengou Formation in the Qaidam Basin, China. The oil shales can be classified into three quality groups (low-, medium-, and high-quality oil shales) through a comprehensive analysis protocol that includes Rock-Eval pyrolysis, total organic carbon (TOC) content, proximate analysis, gas chromatography-mass spectrometry (GC-MS), X-ray diffraction (XRD), major and trace element analyses, and maceral analysis. The low-quality oil shales mainly contain type II1 kerogen, the medium-quality oil shales mainly contain type I-II1 kerogen, and the high-quality oil shales mainly contain type I kerogen. All are immature to early thermally mature. The oil yield of the oil shales is directly related to their quality and are positively correlated with TOC content and calorific value. All studied samples were deposited under anaerobic conditions but in different paleoenvironments. The low-quality oil shales were mainly deposited in fresh-water environments, whereas the high-quality oil shales were usually developed in highly saline and reducing environments. Salinity stratification and evidence of algal blooms that are conducive to organic matter enrichment were identified in both medium- and high-quality oil shales, the latter having the highest paleoproductivity and the best preservation conditions. In summary, shale quality is controlled by a combination of factors, including algal abundance, preservation conditions, the existence of algal blooms and salinity stratification, and paleoproductivity. This study reveals how these different factors affect the quality of oil shales, which might provide an in-depth explanation for the formation process of lacustrine oil shales.

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Section: Controlling Factors On Oil Shale Qualitymentioning

confidence: 99%

A Comparative Study of Different Quality Oil Shales Developed in the Middle Jurassic Shimengou Formation, Yuqia Area, Northern Qaidam Basin, China

et al. 2022

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Levels and sources of hydrocarbons in the Patos Lagoon estuary and Cassino Beach mud bank (South Atlantic, Brazil): evidence of transference between environments

Neves

Costa

Portz

et al. 2023

Environ Monit Assess

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This study aimed to evaluate the concentrations and sources of natural and anthropogenic aliphatic (AHs) and polycyclic aromatic hydrocarbons (PAHs) in sur cial sediments collected along the Patos Lagoon estuary and in sediment cores obtained from the Cassino Beach mud bank. Levels and distribution of nalkanes indicate terrestrial sources, overlapping with a low amount of petrogenic hydrocarbons (heavy oils). A small unresolved complex mixture (UCM) was observed in all samples. On the other hand, the distribution of PAHs in the sediments showed a predominance of pyrolytic over petrogenic sources. In general, hydrocarbons (HCs) contamination in the Patos Lagoon estuary and its adjacent coastal area can be considered low, except for sites near urban or industrial e uents, where moderate to high levels of contamination were found. Concentrations of HCs were homogeneous throughout the sediment cores, suggesting that mixing processes may have occurred along the layers or that HCs inputs to the mud banks were uniform during the studied deposition period. In addition, the levels and pro le of HCs levels in the coastal sediments were similar to those observed in the estuary, suggesting that HCs are promptly exported without any signi cant dilution and/or degradation during this process. Moreover, the frequent remobilization of sediments from the mud bank towards Cassino beach does not seem to pose any threats to the local biota or beach users since the levels of contamination were relatively low.

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Inferring pollution records in sediment cores from transitional environments of Marquelia coast, Guerrero, Mexico

Pitchamani

Ponniah

Rodríguez-Espinosa

et al. 2022

Environ Sci Pollut Res

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Inferring centennial terrigenous input for Patos Lagoon, Brazil: the world's largest choked coastal lagoon

Cited by 8 publications

References 31 publications

A Comparative Study of Different Quality Oil Shales Developed in the Middle Jurassic Shimengou Formation, Yuqia Area, Northern Qaidam Basin, China

A Comparative Study of Different Quality Oil Shales Developed in the Middle Jurassic Shimengou Formation, Yuqia Area, Northern Qaidam Basin, China

Levels and sources of hydrocarbons in the Patos Lagoon estuary and Cassino Beach mud bank (South Atlantic, Brazil): evidence of transference between environments

Inferring pollution records in sediment cores from transitional environments of Marquelia coast, Guerrero, Mexico

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