Changes in orogenic style and surface environment recorded in Paleoproterozoic foreland successions [PDF]
Nature Communications, 2023 The Earth’s interior and surficial systems underwent dramatic changes during the Paleoproterozoic, but the interaction between them remains poorly understood. Rocks deposited in orogenic foreland basins retain a record of the near surface to deep crustal
Bo Huang +7 more
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Geophysical Monograph Series, Page 1-26., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Richard E. Ernst +8 more
wiley +5 more sources
SEM-based automated mineralogy (SEM-AM) and unsupervised machine learning studying the textural setting and elemental association of gold in the Rajapalot Au-Co area, northern Finland [PDF]
Bulletin of the Geological Society of Finland, 2021 SEM-based automated mineralogy (SEM-AM) techniques allow fast and effective way of studying the textural settings of gold in hydrothermal deposits. Unsupervised machine learning (e.g.
Jukka-Pekka Ranta +2 more
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Hiekkapohja hydrothermal system – ore mineral, lithogeochemical and paleomagnetic evidence from the Paleoproterozoic Central Finland Granitoid Complex [PDF]
Bulletin of the Geological Society of Finland, 2023 The Paleoproterozoic Svecofennian Central Finland Granitoid Complex (CFGC) has been regarded as an area of low mineralisation potential. The Hiekkapohja area, 20km north-east of the town of Jyväskylä, host a concentration of variable metalliferous ...
Esa Heilimo +4 more
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Agrociencia Uruguay, 2022 The geochemistry of two metavolcano-sedimentary sequences deposited in the Piedra Alta Terrane is compared, and their geotectonic evolution is discussed.
Gonzalo Blanco +7 more
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Long-lived Paleoproterozoic eclogitic lower crust [PDF]
Nature Communications, 2021 AbstractThe nature of the lower crust and the crust-mantle transition is fundamental to Earth sciences. Transformation of lower crustal rocks into eclogite facies is usually expected to result in lower crustal delamination. Here we provide compelling evidence for long-lasting presence of lower crustal eclogite below the seismic Moho. Our new wide-angle
Sebastian Buntin +7 more
openaire +4 more sources
Life on a Mesoarchean marine shelf – insights from the world’s oldest known granular iron formation
Scientific Reports, 2020 The Nconga Formation of the Mesoarchean (~2.96–2.84 Ga) Mozaan Group of the Pongola Supergroup of southern Africa contains the world’s oldest known granular iron formation.
Albertus J. B. Smith +8 more
doaj +1 more source
Constraints on Paleoproterozoic atmospheric oxygen levels [PDF]
Proceedings of the National Academy of Sciences, 2018 Significance Earth’s protracted oxygenation significantly transformed global biological and geochemical cycles. In particular, the rise of atmospheric oxygen above trace levels was an essential prerequisite for the development of animals. However, quantifying atmospheric oxygen levels in Earth’s middle age remains a daunting challenge.
Eric J. Bellefroid +5 more
openaire +2 more sources
Записки Горного института, 2022 A comprehensive study of a 340 m thick lenticular-sheet body of ultramafic composition penetrated by structural well M-1 at a depth of about 2.2 km was accomplished.
Valeriy F. Smolkin +4 more
doaj +1 more source
Paleoproterozoic sterol biosynthesis and the rise of oxygen [PDF]
Nature, 2017 Natural products preserved in the geological record can function as 'molecular fossils', providing insight into organisms and physiologies that existed in the deep past. One important group of molecular fossils is the steroidal hydrocarbons (steranes), which are the diagenetic remains of sterol lipids.
Gold, David +3 more
openaire +4 more sources