Journal
GLOBAL AND PLANETARY CHANGE
Volume 205, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.gloplacha.2021.103610
Keywords
Biomarker; Hopane; Marinoan; Neoproterozoic; Snowball Earth; Sterane
Funding
- Japan Society for the Promotion of Science [22403016, 25247084]
- Global Center of Excellence Program on Global Education of the Research Center for Earth and Planetary Dynamics at Tohoku University - Ministry of Education, Culture, Sports, Science, and Technology of Japan
- Fundamental Research Funds for the Central Universities [CUGCJ1816]
- Grants-in-Aid for Scientific Research [22403016, 25247084] Funding Source: KAKEN
Ask authors/readers for more resources
This study used biomarker evidence to reveal the evolutionary processes during the late Neoproterozoic from the Marinoan glaciation to the early Ediacaran period. The results show the presence of photosynthetic activity, low productivity, and the expansion of eukaryotes during different stages of this transition.
The late Neoproterozoic (645-535 Ma) represents a key geological period, when a climate shift and revolutionary biological innovations occurred during the Precambrian-Cambrian transition. The Marinoan glaciation impacted the climate and chemical composition of the oceans, restraining the evolution of early life. To elucidate evolutionary processes during the Marinoan-Ediacaran transition, this study presents biomarker evidence (molecular fossils) from the Nantuo Formation and the lower part of the Doushantuo Formation at the Jiulongwan section, China. Our results reveal possible photosynthetic activity (n-C17 + n-C19 [algae] and pristane + phytane [photosynthesis]) during the Marinoan glaciation, followed by low productivity during the early period of cap dolostone precipitation, and recovery of photosynthetic organisms (n-C17 + n-C19: from 0.00 to 0.96 mu g/g TOC; pristane + phytane: from 0.00 to 3.6 mu g/g TOC) or other bacteria (hopanes: from 0.00 to 0.07 ng/g TOC) during late cap carbonate deposition, with the expansion of eukaryotes (steranes/[hopanes + steranes]: from 0.0 to 0.6) after cap carbonate deposition in the early Ediacaran.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available