Variations in trace elements, isotopes, and organic geochemistry during the Hangenberg Crisis, Devonian–Carboniferous transition, northeastern Vietnam

The Hangenberg Crisis at the Devonian–Carboniferous boundary is known as a polyphase extinction event that affected more than 45 % of marine and terrestrial genera. As the cause of this event is still debated, analyses were carried out on sedimentary samples from the Devonian–Carboniferous Pho Han F...

Full description

Saved in:
Bibliographic Details
Published in:The island arc 2020-01, Vol.29 (1), p.n/a
Main Authors: Shizuya, Atena, Oba, Masahiro, Ando, Takuto, Ogata, Yukari, Takashima, Reishi, Nishi, Hiroshi, Komatsu, Toshifumi, Nguyen, Phong D.
Format: Article
Language:English
Subjects:
Carbon isotopes
Carboniferous
chemostratigraphy
Continental margins
Crises
Depletion
Devonian
Geochemistry
Hangenberg
Isotopes
Manganese
Mass extinctions
Molybdenum
Organic matter
Oxidoreductions
Oxygen depletion
Primary production
Sediment samples
Species extinction
Sulfur
Sulphur
Terrestrial environments
Trace elements
Vanadium
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The Hangenberg Crisis at the Devonian–Carboniferous boundary is known as a polyphase extinction event that affected more than 45 % of marine and terrestrial genera. As the cause of this event is still debated, analyses were carried out on sedimentary samples from the Devonian–Carboniferous Pho Han Formation in northeastern Vietnam to reconstruct the paleoenvironment around the time of this event using stable carbon isotopes; total sulfur; manganese; vanadium; molybdenum; and sedimentary organic matter, such as dibenzothiophenes, cadalene, and regular steranes. These geochemical signatures provide a high‐resolution redox history for this section and show that transgression‐driven high primary productivity, possibly enhanced by terrestrial input, caused severe oxygen depletion along the continental margin of the South China block during the Hangenberg Crisis. Multi‐proxy analyses were carried out on Devonian¬–Carboniferous sediments from the Pho Han Formation, northeastern Vietnam to reconstruct the paleoenvironment around the time of the Hangenberg Crisis. The geochemical signatures provide a high‐resolution redox history for this section and show that transgression‐driven high primary productivity possibly enhanced by terrestrial input caused severe oxygen depletion along the continental margin of South China block during the event.
ISSN:1038-4871
1440-1738
DOI:10.1111/iar.12337