Radiolarian age and geochemical characteristics of the Permian bedded chert sequence in the Soi Dao area, Chanthaburi, Southeast of Thailand

• Autorzy: Phromsuwan Waraphorn , Kamata Yoshihito , Ueno Katsumi , Charoentitirat Thasinee , Sardsud Apsorn
• Konferencja: Western Tethys meets Eastern Tethys - geodynamical, palaeoceanographical and palaeobiogeographical events : Second Symposium of the International Geoscience Programme IGCP 710 : 28th August - 3rd September, 2023, Kraków, Poland : abstract book
• Języki publikacji: EN

Abstrakty

EN

Permian chert and siliceous mudstone in the Soi Dao, Chanthaburi Thailand are extracted the details on radiolarian assemblage and age, change of depositional environment, and geochemical characteristics. Permian radiolarians were obtained in three study areas (ASD01, ASD14 and ASD09); which radiolarian age of each section is as follows: ASD01: Early Asselian to Early Sakmarian, ASD14: Late Sakmarian to Artinskian, and ASD09: Capitanian to Early Changhsingian. Considering the lithofacies, ages, and chemical composition of the rocks, a preliminary stratigraphy consisting of basaltic rock, radiolarian bedded chert, siliceous mudstone, and coarse-grained clastic of alternation of sandstone and mudstone in ascending order can be reconstructed. Data on geochemistry analysis, particularly chondrite-normalized REEs patterns of chert and siliceous mudstone, present a gradual change in that degree of the Ce negative anomaly decrease toward the stratigraphical upper position. These changes indicate that the depositional site of the Permian rocks transferred from a state of high hydrothermal activity to a state of weakened activity and that the influx of terrestrial clastics increased. Permian bedded cherts accompanied by basalts and siliceous mudstones recognized in the study area closely resemble to the Paleo- ‑Tethys bedded cherts in terms of their lithofacies and microscopic features; however, their depositional period is much shorter than that of the Paleo-Tethys, indicating that it was deposited in another oceanic basin. The chemical compositions also show that the influence of hydrothermal activity weakened from the strong state, and the terrigenous clastics rapidly supplied.

Słowa kluczowe

EN

geochemistry; Thailand; Permian bedded

PL

geochemia; Tajlandia; perm

• Wydawca: Wydawnictwa AGH ; Stowarzyszenie Naukowe im. Stanisława Staszica
• Czasopismo: Geotourism / Geoturystyka
• Rocznik: 2023
• Tom: nr 1-2 (72-73)
• Strony: 56--56

Twórcy

autor

Phromsuwan Waraphorn

• Graduate School of Science and Technology, Degree Programs in Life and Earth Sciences, Doctoral Program in Geosciences, University of Tsukuba, Ibaraki, 305-8572, Japan
• Department of Mineral Resources, Bureau of Geological Survey, Bangkok 10400, Thailand

autor

Kamata Yoshihito

• Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan

autor

Ueno Katsumi

• Department of Earth System Science, Fukuoka University, Fukuoka 814-0180, Japan

autor

Charoentitirat Thasinee

• Department of Geology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand

autor

Sardsud Apsorn

• Department of Mineral Resources, Bureau of Geological Survey, Bangkok 10400, Thailand

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).