Geochemistry of Asara Shale member of Karaj Formation, Central Alborz, Iran: Provenance, source weathering and tectonic setting

Malekzadeh, Mohammad; Hosseini-Barzi, Mahboubeh; Sadeghi, Abbas; Critelli, Salvatore

doi:10.1016/j.marpetgeo.2020.104584

Cited by 35 publications

(3 citation statements)

References 57 publications

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“…To decrease this effect and to further confirm the results, two other widely used plots have been applied to investigate the tectonic settings (Figure 10a,b). Roser and Korsch (1986) have proposed the K 2 O/Na 2 O-SiO 2 plot for indicating the tectonic settings of PMs, ACMs and volcanic island arcs (ARCs), and this method works well in studies of tectonic identification by using major elements (Cai et al, 2008;Das, Al-Mikhlafi, & Kaur, 2006;Malekzadeh, Hosseini-Barzi, Sadeghi, & Critelli, 2020;Nagarajan et al, 2017). Based on the K 2 O/Na 2 O-SiO 2 (Figure 9a), (Hossain 2019).…”

Section: Tectonic Settingmentioning

confidence: 99%

Provenance, source weathering, and tectonics of the Yarlung Zangbo River overbank sediments in Tibetan Plateau, China, using major, trace, and rare earth elements

Huyan¹,

Yao²,

Xie³

et al. 2021

Geological Journal

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This paper studies the major, trace, and rare earth elements (REEs) in fluvial sediments from the Yarlung Zangbo River (YZR) on the Tibetan Plateau, China, with the aim of investigating their provenances, sediment maturity, weathering conditions, and tectonic settings. All samples and analytical techniques are based on Environmental Geochemical Monitoring Networks, which are a crucial part of IGCP259/360 (Global Geochemical Baseline). The results show that the YZR sediments consist of greywacke and litharenite with low-moderate maturities of textures and minerals. The chemical index of alteration (CIA) (49-71), plagioclase index of alteration (49-77), and index of compositional variability (ICV) values (0.82-1.54) indicate that both mature and immature sediments are present in the YZR and have experienced weak to moderate weathering with little intense weathering in the source area, which is also confirmed by the ICV-CIA, A-CN-K, A-CNK-FM, and MFW plots. Moreover, the provenance discrimination diagrams suggest that the YZR sediments are predominantly derived from felsic rocks that are close to the upper continental crust and from acid intermediates, and the tectonic settings of the YZR source rocks were associated with active continental margins and continental island arcs. The overall sediment types, weathering conditions, and tectonics of the YZR were consistent with those of the Brahmaputra River and Meghna River during the Himalayan-Tibetan orogeny, while the sediments of the Brahmaputra River are characterized by recycled-quartzose sources when compared with the other two Himalayan rivers due to the contributions of quartzolithic composition.

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Section: Tectonic Settingmentioning

confidence: 99%

Provenance, source weathering, and tectonics of the Yarlung Zangbo River overbank sediments in Tibetan Plateau, China, using major, trace, and rare earth elements

Huyan¹,

Yao²,

Xie³

et al. 2021

Geological Journal

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“…In a ternary plot of SiO 2 (representing quartz or opaline silica), Al 2 O 3 (representing mica/clay minerals), and CaO (representing carbonate) (e.g., Wehausen et al, 2003;Perri et al, 2012Perri et al, , 2014Perri et al, , 2017Malekzadeh et al, 2020), the samples of the pre-orogenic formations fall close to the CaO apex toward the direction of the Al-Si side due to the abundance of carbonate minerals. Mudrocks of the syn-orogenic successions represent a mixture of aluminosilicate and carbonate phases, which is more evident in the Almeria area (Fig.…”

Section: Mineralogy Of Mudrocksmentioning

confidence: 99%

Sedimentary history and palaeogeography of the Cenozoic clastic wedges of the Malaguide Complex, Internal Betic Cordillera, southern Spain

Critelli

Martı́n-Martı́n

Capobianco

et al. 2021

Marine and Petroleum Geology

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“…Previous studies on the early Aptian black shale have mainly focused on marine strata, ,,− while isochronous continental black shale has been rarely studied, and they are mainly concentrated in basins in Northeast China and Jiuxi Basin. ,, The enrichment of organic matter in black shale is the result of many factors, among which adequate sources of organic matter and good preservation conditions play an important role. − ,, The spatial distribution and environmental geochemical indexes of oil shales within different regions are quite distinct, which is closely related to paleoclimate, lake evolution, and provenance supply. − …”

Section: Introductionmentioning

confidence: 99%

Lacustrine Oil Shale Formation of Lower Cretaceous Bayingebi Formation in the Northeast of the Yin’e Basin: Implications from Lake Evolution, Provenance, and Paleoclimate

Liu

Li³

et al. 2022

ACS Earth Space Chem.

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The Bayingebi Formation in the northeast of the Yin'e Basin developed abundant oil shale resources. A better understanding of the formation mechanism of these oil shales is of great significance for reconstructing the palaeogeographic environment of the Early Cretaceous in Northwest China and exploring potential unconventional oil and gas resources. In this study, a large amount of drilling data was used to reconstruct the sedimentary sequence stratigraphic framework, and the plane distribution of sandstone bodies and sedimentary facies in different system tracts was recovered. The lower member of the Bayingebi Formation (K 1 b 1 ) is identified as a developing low-stand system tract. The upper member (K 1 b 2 ) contains three system tracts, including a transgressive system tract (TST), a high-stand system tract (HST), and a regressive system tract (RST). Thick oil shale developed in the HST and the terrigenous detrital supply of the lake mainly came from the south and southwest. Petrology and organic geochemistry are used here to characterize the oil shale and mudstone. The oil yield of oil shale is primarily distributed between 3.5 and 6.5 wt %, and it is mainly type I kerogen (including lamalginite and telalginite). The oil yield of mudstone is lower than 3.5 wt %, and it is mostly type II 1 kerogen (including sporinite and telalginite). According to the analysis of provenance and paleoclimate from element geochemical indicators, the parent rocks of the Bayingebi Formation oil shale and mudstone are mainly of Permian andesite, which represent the tectonic background of a continental island arc. During the transition from the TST to HST, the paleoclimate changed from cool-semidry to warm-semihumid, the paleotemperature increased about 10 °C, the lake level gradually increased, and the degree of chemical weathering gradually strengthened. The early Aptian continental paleoclimate change in the Yin'e Basin coincides with coeval rising global paleotemperature. This study provides a basis for the response of continental paleolakes to the oceanic anoxic event (OAE 1a) and provides a reference for the organic matter enrichment mechanism of the black shale of the Bayingebi Formation.

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Geochemistry of Asara Shale member of Karaj Formation, Central Alborz, Iran: Provenance, source weathering and tectonic setting

Cited by 35 publications

References 57 publications

Provenance, source weathering, and tectonics of the Yarlung Zangbo River overbank sediments in Tibetan Plateau, China, using major, trace, and rare earth elements

Provenance, source weathering, and tectonics of the Yarlung Zangbo River overbank sediments in Tibetan Plateau, China, using major, trace, and rare earth elements

Sedimentary history and palaeogeography of the Cenozoic clastic wedges of the Malaguide Complex, Internal Betic Cordillera, southern Spain

Lacustrine Oil Shale Formation of Lower Cretaceous Bayingebi Formation in the Northeast of the Yin’e Basin: Implications from Lake Evolution, Provenance, and Paleoclimate

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