Understanding the geobiology of the terminal Ediacaran Khatyspyt Lagerstätte (Arctic Siberia, Russia)
The Khatyspyt Lagerstätte (~544 Ma, Russia) provides a valuable window into late Ediacaran Avalon-type ecosystems with rangeomorphs, arboreomorphs, and mega-algae. Here, we tackle the geobiology of this Lagerstätte by the combined analysis of paleontological features, sedimentary facies, and lipid b...
Published in: | Geobiology |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2020
|
Subjects: | |
Online Access: | https://doi.org/10.1111/gbi.12412 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8871 |
id |
ftsubggeo:oai:e-docs.geo-leo.de:11858/8871 |
---|---|
record_format |
openpolar |
spelling |
ftsubggeo:oai:e-docs.geo-leo.de:11858/8871 2023-05-15T15:12:18+02:00 Understanding the geobiology of the terminal Ediacaran Khatyspyt Lagerstätte (Arctic Siberia, Russia) Duda, Jan-Peter Love, Gordon D. Rogov, Vladimir I. Melnik, Dmitry S. Blumenberg, Martin Grazhdankin, Dmitriy V. 2020 https://doi.org/10.1111/gbi.12412 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8871 eng eng doi:10.1111/gbi.12412 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8871 This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY ddc:560 ichnofabrics lipid biomarkers methylgammacerane methylgammacerane index (MGI) sedimentary facies trace fossils vertical bioturbation doc-type:article 2020 ftsubggeo https://doi.org/10.1111/gbi.12412 2022-11-09T06:51:38Z The Khatyspyt Lagerstätte (~544 Ma, Russia) provides a valuable window into late Ediacaran Avalon-type ecosystems with rangeomorphs, arboreomorphs, and mega-algae. Here, we tackle the geobiology of this Lagerstätte by the combined analysis of paleontological features, sedimentary facies, and lipid biomarkers. The Khatyspyt Formation was deposited in carbonate ramp environments. Organic matter (0.12–2.22 wt.% TOC) displays characteristic Ediacaran biomarker features (e.g., eukaryotic steranes dominated by the C29 stigmastane). Some samples contain a putative 2-methylgammacerane that was likely sourced by ciliates and/or bacteria. 24-isopropylcholestane and 26-methylstigmastane are consistently scarce (≤0.4% and ≤0.2% of ∑C27-30 regular steranes, respectively). Thus, Avalon-type organisms occupied different niches than organisms capable of directly synthesizing C30 sterane precursors among their major lipids. Relative abundances of eukaryotic steranes and bacterial hopanes (sterane/hopane ratios = 0.07–0.30) demonstrate oligotrophic and bacterially dominated marine environments, similar to findings from other successions with Ediacara-type fossils. Ediacara-type fossils occur in facies characterized by microbial mats and biomarkers indicative for a stratified marine environment with normal–moderate salinities (moderate–high gammacerane index of 2.3–5.7; low C35 homohopane index of 0.1–0.2). Mega-algae, in contrast, are abundant in facies that almost entirely consist of allochthonous event layers. Biomarkers in these samples indicate a non-stratified marine environment and normal salinities (low gammacerane index of 0.6–0.8; low C35 homohopane index of 0.1). Vertical burrowers occur in similar facies but with biomarker evidence for stratification in the water column or around the seafloor (high gammacerane index of 5.6). Thus, the distribution of macro-organisms and burrowers was controlled by various, dynamically changing environmental factors. It appears likely that dynamic settings like the Khatyspyt Lagerstätte ... Article in Journal/Newspaper Arctic Siberia GEO-LEOe-docs (FID GEO) Arctic Geobiology 18 6 643 662 |
institution |
Open Polar |
collection |
GEO-LEOe-docs (FID GEO) |
op_collection_id |
ftsubggeo |
language |
English |
topic |
ddc:560 ichnofabrics lipid biomarkers methylgammacerane methylgammacerane index (MGI) sedimentary facies trace fossils vertical bioturbation |
spellingShingle |
ddc:560 ichnofabrics lipid biomarkers methylgammacerane methylgammacerane index (MGI) sedimentary facies trace fossils vertical bioturbation Duda, Jan-Peter Love, Gordon D. Rogov, Vladimir I. Melnik, Dmitry S. Blumenberg, Martin Grazhdankin, Dmitriy V. Understanding the geobiology of the terminal Ediacaran Khatyspyt Lagerstätte (Arctic Siberia, Russia) |
topic_facet |
ddc:560 ichnofabrics lipid biomarkers methylgammacerane methylgammacerane index (MGI) sedimentary facies trace fossils vertical bioturbation |
description |
The Khatyspyt Lagerstätte (~544 Ma, Russia) provides a valuable window into late Ediacaran Avalon-type ecosystems with rangeomorphs, arboreomorphs, and mega-algae. Here, we tackle the geobiology of this Lagerstätte by the combined analysis of paleontological features, sedimentary facies, and lipid biomarkers. The Khatyspyt Formation was deposited in carbonate ramp environments. Organic matter (0.12–2.22 wt.% TOC) displays characteristic Ediacaran biomarker features (e.g., eukaryotic steranes dominated by the C29 stigmastane). Some samples contain a putative 2-methylgammacerane that was likely sourced by ciliates and/or bacteria. 24-isopropylcholestane and 26-methylstigmastane are consistently scarce (≤0.4% and ≤0.2% of ∑C27-30 regular steranes, respectively). Thus, Avalon-type organisms occupied different niches than organisms capable of directly synthesizing C30 sterane precursors among their major lipids. Relative abundances of eukaryotic steranes and bacterial hopanes (sterane/hopane ratios = 0.07–0.30) demonstrate oligotrophic and bacterially dominated marine environments, similar to findings from other successions with Ediacara-type fossils. Ediacara-type fossils occur in facies characterized by microbial mats and biomarkers indicative for a stratified marine environment with normal–moderate salinities (moderate–high gammacerane index of 2.3–5.7; low C35 homohopane index of 0.1–0.2). Mega-algae, in contrast, are abundant in facies that almost entirely consist of allochthonous event layers. Biomarkers in these samples indicate a non-stratified marine environment and normal salinities (low gammacerane index of 0.6–0.8; low C35 homohopane index of 0.1). Vertical burrowers occur in similar facies but with biomarker evidence for stratification in the water column or around the seafloor (high gammacerane index of 5.6). Thus, the distribution of macro-organisms and burrowers was controlled by various, dynamically changing environmental factors. It appears likely that dynamic settings like the Khatyspyt Lagerstätte ... |
format |
Article in Journal/Newspaper |
author |
Duda, Jan-Peter Love, Gordon D. Rogov, Vladimir I. Melnik, Dmitry S. Blumenberg, Martin Grazhdankin, Dmitriy V. |
author_facet |
Duda, Jan-Peter Love, Gordon D. Rogov, Vladimir I. Melnik, Dmitry S. Blumenberg, Martin Grazhdankin, Dmitriy V. |
author_sort |
Duda, Jan-Peter |
title |
Understanding the geobiology of the terminal Ediacaran Khatyspyt Lagerstätte (Arctic Siberia, Russia) |
title_short |
Understanding the geobiology of the terminal Ediacaran Khatyspyt Lagerstätte (Arctic Siberia, Russia) |
title_full |
Understanding the geobiology of the terminal Ediacaran Khatyspyt Lagerstätte (Arctic Siberia, Russia) |
title_fullStr |
Understanding the geobiology of the terminal Ediacaran Khatyspyt Lagerstätte (Arctic Siberia, Russia) |
title_full_unstemmed |
Understanding the geobiology of the terminal Ediacaran Khatyspyt Lagerstätte (Arctic Siberia, Russia) |
title_sort |
understanding the geobiology of the terminal ediacaran khatyspyt lagerstätte (arctic siberia, russia) |
publishDate |
2020 |
url |
https://doi.org/10.1111/gbi.12412 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8871 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Siberia |
genre_facet |
Arctic Siberia |
op_relation |
doi:10.1111/gbi.12412 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8871 |
op_rights |
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1111/gbi.12412 |
container_title |
Geobiology |
container_volume |
18 |
container_issue |
6 |
container_start_page |
643 |
op_container_end_page |
662 |
_version_ |
1766343001684049920 |