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Karst-bauxite formation during the Great Oxidation Event indicated by dating of authigenic rutile and its thorium content
Aluminium (Al)-rich palaeosols—i.e., palaeobauxite deposits—should have formed in karst depressions in carbonate sequences as a result of acidic...
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Submarine metalliferous carbonate mounds in the Cambrian of the Baltoscandian Basin induced by vent networks and water column stratification
Two massive precipitation events of polymetallic ore deposits, encrusted by a mixture of authigenic carbonates, are documented from the Cambrian of...
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Onset of coupled atmosphere–ocean oxygenation 2.3 billion years ago
The initial rise of molecular oxygen (O 2 ) shortly after the Archaean–Proterozoic transition 2.5 billion years ago was more complex than the single...
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Marine siliceous ecosystem decline led to sustained anomalous Early Triassic warmth
In the wake of rapid CO 2 release tied to the emplacement of the Siberian Traps, elevated temperatures were maintained for over five million years...
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Reservoir quality and its controlling diagenetic factors in the Bentiu Formation, Northeastern Muglad Basin, Sudan
The Abu Gabra and Bentiu formations are widely distributed within the interior Muglad Basin. Recently, much attention has been paid to study,...
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A tuff interlayer in deep potash-bearing salt rocks and its implication for potash mineralization in the Simao Basin, southwestern China
The lithology and genesis of a dark grey clastic interlayer first encountered within the deepest potassium-rich salt body in the Simao Basin,...
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Pore types, genesis, and evolution model of lacustrine oil-prone shale: a case study of the Cretaceous Qingshankou Formation, Songliao Basin, NE China
A comprehensive characterisation of the pore structure in shale oil reservoirs is essential for forecasting oil production and exploration risks....
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Dynamic redox and nutrient cycling response to climate forcing in the Mesoproterozoic ocean
Controls on Mesoproterozoic ocean redox heterogeneity, and links to nutrient cycling and oxygenation feedbacks, remain poorly resolved. Here, we...
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Sedimentology, petrography, and reservoir quality of the Zarga and Ghazal formations in the Keyi oilfield, Muglad Basin, Sudan
The Zarga and Ghazal formations constitute important reservoirs across the Muglad Basin, Sudan. Nevertheless, the sedimentology and diagenesis of...
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Mid- to late Holocene sea-level rise recorded in Hells Bells 234U/238U ratio and geochemical composition
Hells Bells are underwater secondary carbonates discovered in sinkholes (cenotes) southeast of Cancun on the north-eastern Yucatán peninsula, Mexico....
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Uncovering the Ediacaran phosphorus cycle
Phosphorus is a limiting nutrient that is thought to control oceanic oxygen levels to a large extent
1 –3 . A possible increase in marine phosphorus...
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Transient fertilization of a post-Sturtian Snowball ocean margin with dissolved phosphate by clay minerals
Marine sedimentary rocks deposited across the Neoproterozoic Cryogenian Snowball interval, ~720-635 million years ago, suggest that post-Snowball...
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Active methanogenesis during the melting of Marinoan snowball Earth
Geological evidence indicates that the deglaciation of Marinoan snowball Earth ice age (~635 Myr ago) was associated with intense continental...
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Sedimentary and diagenetic characteristics of the Z21 field in the Huizhou depression, Pearl River Mouth basin, South China Sea
The Huizhou Depression in the Pearl River Mouth basin has prospective hydrocarbon potential, with Miocene sandstones as its main oil and gas-bearing...
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Early porosity generation in organic-sulfur-rich mudstones
High total organic sulfur (TOS) content (i.e., Type IIS kerogen) is well known to significantly influence kerogen transformation but the effect of...
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Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex
Methane emissions from Arctic continental margins are increasing due to the negative effect of global warming on ice sheet and permafrost stability,...
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Unveiling a new oceanic anoxic event at the Norian/Rhaetian boundary (Late Triassic)
The latest Triassic was characterised by protracted biotic extinctions concluding in the End-Triassic Extinction (~ 200 Ma) and a global carbon cycle...
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Global ocean redox changes before and during the Toarcian Oceanic Anoxic Event
Mesozoic oceanic anoxic events are recognized as widespread deposits of marine organic-rich mudrocks temporally associated with mass extinctions and...
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Preservation of early Tonian macroalgal fossils from the Dolores Creek Formation, Yukon
The rise of eukaryotic macroalgae in the late Mesoproterozoic to early Neoproterozoic was a critical development in Earth’s history that triggered...
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Implication of the micro- and lithofacies types on the quality of a gas-bearing deltaic reservoir in the Nile Delta, Egypt
The Messinian Qawasim sequence, as one of the most important reservoirs in the Egyptian Nile Delta, represents a typical gas-bearing deltaic...
