Middle–late Miocene paleoenvironment of the Japan sea inferred by sedimentological and geochemical characterization of coeval sedimentary rocks

Martizzi, Paolo; Chiyonobu, Shun; Hibi, Y.; Yamato, H.; Arato, Hiroyuki

doi:10.1016/j.marpetgeo.2021.105059

Cited by 12 publications

(9 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The second explanation is that oxygen-rich seawater flowed to the seafloor in the Yashima area because vertical circulation associated with coastal upwelling occurred locally (Yamamoto et al, 1999;Fukusawa, 1992). Alternatively, this circulation may have occurred basin-wide between the upper and lower seawater of the Japan Sea because upwelling occurred in a broad area of the western coast of northern Japan (Fukusawa, 1992;Sato et al, 1995;Martizzi et al, 2021) and because bottom currents were intensified at 9 Ma (Watanabe, 1994) when similar changes from reducing to oxidizing environments appeared on Sado Island (Fig. 1; Sakamoto, 1992).…”

Section: Reconstruction Of Sedimentary Environmental Changes In the A...mentioning

confidence: 99%

“…In addition to the environmental changes discussed above, diagenesis also played an important role in altering the source rock characters and resultant hydrocarbon distribution. Centimeter-to meter-scale rhythmical alternation of dark and light mudstones in the Onnagawa and equivalent formations has often been attributed to orbital-scale sea-level fluctuations that allowed intrusion of the nutrient-rich, oxygen-poor North Pacific Intermediate Water into the Japan Sea during sea-level highstands and restricted the intrusion during sea-level lowstands by a sill (Tada, 1991;Martizzi et al, 2021). However, our biomarker analysis of hard and soft mudstones in the Onnagawa Formation and black and white bands in the Kusanagi Formation clarifies that organic matter sources and redox conditions were almost the same in both units, with only TOC differing.…”

Section: Reconstruction Of Sedimentary Environmental Changes In the A...mentioning

confidence: 99%

“…These formations are the source rocks for the oil and gas fields in these basins (Sampei et al, 2003), and thus have been extensively evaluated (e.g., Suzuki et al, 1995). To further elucidate the conditions for source rock formation, Akita Basin marine and sedimentary environments have also been studied (Tsuji et al, 1991;Tada, 1991Tada, , 1994Tada, , 1995Watanabe, 1994, 1995;Martizzi et al, 2020Martizzi et al, , 2021.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spatio-temporal changes in the depositional environment of Miocene organic rich mudstones in the Akita Basin deduced from biomarker analysis

et al. 2022

View full text Add to dashboard Cite

Paleoceanographic changes in the Akita Basin during the Miocene were investigated using biomarker analysis of source rocks from the Onnagawa and Kusanagi formations in the Yashima area (eastern basin margin) and the Shonai Plain (central basin). During the Nishikurosawa Stage (~13 Ma), the homohopane index indicated a slightly oxidizing depositional environment. At this time, the Japan Sea was an open marginal sea and an oxidizing environment; thus, organic matter preservation in the Akita Basin was low. In the Early Onnagawa Stage (~12 Ma), the Japan Sea became semi-closed because of uplift of the proto-Northeastern Japan Arc. This change is reflected in the pristane/phytane ratio and homohopane index that suggest the Yashima and Shonai Plain areas became reducing, which enhanced organic matter preservation. The depositional environment of the Kusanagi Formation (Shonai Plain) was more reducing than that of the Onnagawa Formation (Yashima area). During the Middle Onnagawa Stage (10 Ma), the homohopane index showed that the Onnagawa Formation (Yashima area) had shifted to an oxidizing depositional environment. Additionally, the C 27 /C 27 + C 29 sterane ratio indicated that algae were responsible for the higher overall primary production in the Middle Onnagawa Stage. This high primary productivity was associated with localized coastal upwelling, which resulted in generally high organic matter content in the Middle Onnagawa Formation. In the Shonai Plain area (Kusanagi Formation), bottom water conditions remained anoxic; however, sedimentary organic matter content did not increase because there was no upwelling in the area. During the Late Onnagawa Stage (8 Ma), the seafloor environment in the Shonai Plain area also became oxidizing. As a result of enhanced organic matter decomposition, overall sedimentary organic matter content decreased.Our results demonstrate that local variations in primary productivity and bottom water conditions are recorded in the sedimentary record and emphasize the importance of geographic and tectonic settings to the deposition and preservation of organic-rich source rocks. Thus, this study was able to describe spatio-temporal changes over the entire Akita Basin.

show abstract

Section: Reconstruction Of Sedimentary Environmental Changes In the A...mentioning

confidence: 99%

Section: Reconstruction Of Sedimentary Environmental Changes In the A...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spatio-temporal changes in the depositional environment of Miocene organic rich mudstones in the Akita Basin deduced from biomarker analysis

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The concentration of major elements in siliciclastic sediments is strongly influenced by the degree of chemical weathering [12]- [14]. Various chemical compounds have been proposed as parameters to assess weathering intensity [12]- [16]. Several methods have been applied extensively to examine the chemical weathering degree in siliciclastic sediment, and utilized to examine the extent of chemical weathering in siliciclastic sediments [12]- [16].…”

Section: Chemical Weathering and Paleoclimatementioning

confidence: 99%

“…Various chemical compounds have been proposed as parameters to assess weathering intensity [12]- [16]. Several methods have been applied extensively to examine the chemical weathering degree in siliciclastic sediment, and utilized to examine the extent of chemical weathering in siliciclastic sediments [12]- [16]. Nesbitt and Young (1982) The Chemical Alteration Index (CIA) value is a useful indicator of the degree of chemical weathering in sedimentary rocks, in conjunction with facies analysis [17].…”

Section: Chemical Weathering and Paleoclimatementioning

confidence: 99%

Paleoweathering and Detrital Provenance of Balangbaru Shale, in South Sulawesi

Burhanuddin,

Hidayah,

Santy

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Sulawesi Island, known for its geological complexity, offers a unique opportunity for researchers to investigate further into sedimentary basins particularly in South Sulawesi area. The Cretaceous Balangbaru Shale is one of the rocks that has an extensive distribution in South Sulawesi especially in the western part. Due to limitation of geological information related to this formation we performed the paleodepositional investigation to elucidate the paleoweathering, geochemistry characterization, and detrital provenance of the Balangbaru Shale. Indeed, previous studies have demonstrated that fine-grained sedimentary rocks can serve as valuable archives of geochemical information, enabling the reconstruction of paleoclimate evolution during the deposition period. Employing XRF quantitative analysis, we examine the dispersion of major elements within eight distinct layers of the Shale. Additionally, comprehensive whole-rock analyses enable us to ascertain the abundance of major elements and subsequently deduce detrital SiO2 and biogenic SiO2 content, thereby comprehending the inorganic geochemical composition of the Balangbaru Shale. The present study seeks to address the limited understanding of the geochemical properties of the Balangbaru Shale, specifically pertaining to paleoweathering intensity and detrital provenance. Acknowledging the scarcity of recent data available on the subject matter, this research aims to bridge the limitation data gap by conducting an in-depth investigation into the geochemical characteristics of the Balangbaru Shale by employing major oxides concentrations (SiO2, Al2O3, Fe2O3, K2O, P2O5, MgO, CaO, Na2O, MnO, TiO2, Cr2O3) and trace elements (Sr, Cu, Ba, Th, Ni, V, Th, U) into the equations such as C-value, chemical index alteration (CIA), plagioclase index of alteration (PIA), weathering index of parker (WIP) and ratio of Rb/Sr, U/Th, Sr/Cu, Sr/Ba. Furthermore, the major oxides ratio of Al2O3/TiO2 and TiO2/Zr were performed to specify the sediment provenance and the source-area rock compositions of the Balangbaru Shale. The obtained data reveals a moderate to high degree of weathering intensity in the detrital source environment of the Balangbaru Shale, suggesting warm to humid climate conditions in the source region. Additionally, the analysis of the detrital fraction indicates the possible origin of the Balangbaru Shale from felsic rocks. Overall, these findings contribute significantly to the understanding of paleoenvironmental conditions associated with the Balangbaru Shale, shedding light on its geological history.

show abstract

Petrochemical characterization of metasedimentary rocks in the Nkolkosse area, Yaoundé domain of the Pan-African fold belt in Cameroon: constrain on their provenance, protolith, and tectonic setting

Armelle,

Djibril,

Brice

et al. 2023

Arab J Geosci

View full text Add to dashboard Cite

Middle–late Miocene paleoenvironment of the Japan sea inferred by sedimentological and geochemical characterization of coeval sedimentary rocks

Cited by 12 publications

References 53 publications

Spatio-temporal changes in the depositional environment of Miocene organic rich mudstones in the Akita Basin deduced from biomarker analysis

Spatio-temporal changes in the depositional environment of Miocene organic rich mudstones in the Akita Basin deduced from biomarker analysis

Paleoweathering and Detrital Provenance of Balangbaru Shale, in South Sulawesi

Petrochemical characterization of metasedimentary rocks in the Nkolkosse area, Yaoundé domain of the Pan-African fold belt in Cameroon: constrain on their provenance, protolith, and tectonic setting

Contact Info

Product

Resources

About