Back to Search
Start Over
Bioturbation of Thalassinoides from the Lower Cambrian Zhushadong Formation of Dengfeng area, Henan Province, North China
- Source :
- Journal of Palaeogeography, Vol 10, Iss 1, Pp 1-16 (2021)
- Publication Year :
- 2021
- Publisher :
- Elsevier, 2021.
-
Abstract
- Bioturbation plays a critical role in sediment mixing and biogeochemical cycling between sediment and seawater. An abundance of bioturbation structures, dominated by Thalassinoides, occurs in carbonate rocks of the Cambrian Series 2 Zhushadong Formation in the Dengfeng area of western Henan Province, North China. Determination of elemental geochemistry can help to establish the influence of burrowing activities on sediment biogeochemical cycling, especially on changes in oxygen concentration and nutrient regeneration. Results show that there is a dramatic difference in the bioturbation intensity between the bioturbated limestone and laminated dolostone of the Zhushadong Formation in terms of productivity proxies (Baex, Cu, Ni, Sr/Ca) and redox proxies (V/Cr, V/Sc, Ni/Co). These changes may be related to the presence of Thalassinoides bioturbators, which alter the particle size and permeability of sediments, while also increase the oxygen concentration and capacity for nutrient regeneration. Comparison with modern studies shows that the sediment mixing and reworking induced by Thalassinoides bioturbators significantly changed the primary physical and chemical characteristics of the Cambrian sediment, triggering the substrate revolution and promoting biogeochemical cycling between sediment and seawater.
- Subjects :
- Dolostone
Biogeochemical cycle
010504 meteorology & atmospheric sciences
biology
Trace element proxy
Geochemistry
Sediment
Paleontology
Nutrient regeneration
010502 geochemistry & geophysics
biology.organism_classification
01 natural sciences
QE701-760
Thalassinoides
Carbonate rock
Sediment mixing
Seawater
Oxygen concentration
Cambrian Series 2
Bioturbation
Early Cambrian
Geology
0105 earth and related environmental sciences
Subjects
Details
- Language :
- English
- ISSN :
- 25244507
- Volume :
- 10
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Journal of Palaeogeography
- Accession number :
- edsair.doi.dedup.....69d3400ca98db15c03b37f5b5f5c1b7f