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4601
Co-evolution characteristics of organic matter and reservoir in continental shale: a case study of Shahezi Formation in Changling Faulted Depression, Songliao Basin
Published 2023-03-01“…According to thermal evolution simulation experiments on hydrocarbon generation and expulsion and the tests and analysis on a series of reservoir characteristics in organic shale samples containing type Ⅲ kerogen from the Lower Cretaceous Shahezi Formation, Changling Faulted Depression, it was found that there were two key nodes of thermal evolution in the shale, namely, equivalent vitrinite reflectance (Ro) of 1.5% and 2.0%, respectively. …”
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4602
Structural interpretation of High-resolution aeromagnetic data over the Dahomey basin, Nigeria: implications for hydrocarbon prospectivity
Published 2021-03-01“…Abstract The renewed quest to boost Nigeria’s dwindling reserves through aggressive search for oil and gas deposits in Cretaceous sedimentary basins has re-ignited the need to re-evaluate the hydrocarbon potentials of the Dahomey Basin. …”
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4603
Characteristics of Source Rocks and Formation of Reservoir Bitumen in Yinchuan Graben, Ordos Basin, China
Published 2022-06-01“…Over 8000 m of Cenozoic strata have been formed since the Cretaceous. With an integrated approach of cores observation, logging analysis, and geochemical analysis, we analyzed the characteristics of the Cenozoic source rocks in the Yinchuan Graben and determined the formation and destruction of the fossil oil reservoirs. …”
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4604
New Material of Paleocene-Eocene Pellornis (Aves: Gruiformes) Clarifies the Pattern and Timing of the Extant Gruiform Radiation
Published 2019-06-01“…Our results suggest a Paleocene origin for this important clade, bolstering evidence for a rapid early radiation of Neoaves following the end-Cretaceous mass extinction.…”
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4605
Bitumen formation of Cambrian Longwangmiao Formation in the central Sichuan and its implication for hydrocarbon accumulation
Published 2018-03-01“…The result shows that all bitumens in the Longwangmiao Formation was from the Lower Cambrian source rocks, it had multiple genetic types which was dominated by the pyrolysis genetic type; the bitumens were formed into three stages, i.e., the bitumen of the oxidized water-washing type in the first stage, the bitumen of the precipitated type in the second stage, and the bitumen of the pyrolyzed type in the third stage; the gas reservoir in the Anyue gasfield experienced five stages of hydrocarbon charging, including two stages of liquid hydrocarbon charging, charging of the kerogen pyrolysis gas in the Late Triassic-Early Jurassic, charging of the crude oil pyrolysis gas in the Late Jurassic-Early Cretaceous and charging of the dry gas charging in the Himalayan trap reformation and adjustment process. …”
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4606
Geological heritage in the Northern Apuseni Mountains (Romania): Degradation risk assessment of selected geosites
Published 2023-12-01“…The assessment revealed that three geosites, namely the type locality of dacite (Poieni), the paleontological reserve Snail Hill from Vidra, and the Upper Cretaceous rudist-bearing shallow-marine deposit from Crișului Valley, have a high degradation risk, necessitating the development of targeted geoconservation plans. …”
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4607
Lineament analysis of South Jenein Area (Southern Tunisia) using remote sensing data and geographic information system
Published 2012-12-01“…These structures were the origin of the tilted blocks delimited by fracture and folding of the Upper Cretaceous series (i.e., Senonian). An extensive structural analysis was carried out to precise the kinematic and geodynamic contact in terms of stress tensor in a domain that was considered as a stable platform for longtime. …”
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4608
A new Hauterivian palynoflora from the Vale Cortiço site (central Portugal), and its palaeoecological implications for western Iberia.
Published 2019-12-01“…Here we describe a new Early Cretaceous palynoflora from the Lusitanian Basin in the Estremadura region of central western Portugal. …”
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4609
The complete mitochondrial genome of Dimorphopterus japonicus (Hidaka, 1959) (Hemiptera, Lygaeoidea) and phylogenetic relationships within the Lygaeoidea superfamily
Published 2024-11-01“…Estimated divergence times revealed that the divergence time of the Lygaeoidea was 99.4 Ma (95% HPD: 83.4-124.8 Ma), and most lygaeoid families diverged during the early Cretaceous to late Paleogene. Berytidae is the latest differentiation in the lygaeoid families, and the genus Dimorphopterus was differentiated in 45.9 Ma (95% HPD: 39.8–47.7 Ma). …”
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4610
Slope Failure in a Period of Increased Landslide Activity: Sennwald Rock Avalanche, Switzerland
Published 2021-08-01“…A slope failure, namely the Sennwald rock avalanche, occurred in the southeast wall of this fold-and-thrust structure due to the rock failure of Lower Cretaceous Helvetic limestones along the Rhine River valley. …”
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4611
A review of the Late Mesozoic magmatic arc in Borneo with slab subduction models
Published 2020-09-01“…The Late Mesozoic magmatic arc in Borneo is either related to the northwestward subduction of the Meso-Tethys slab, or the southward subduction of the proto-South China Sea slab, or possibly both, controled by the Tethys and paleo-Pacific domains. The pre-Cretaceous tectonic affinity of SW Borneo is either with the Cathaysia block or as a fragment of the eastern Sundaland, or it may be an exotic block from the Gondwana continent. …”
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4612
Sandbody architecture analysis of braided river reservoirs and their significance for remaining oil distribution: A case study based on a new outcrop in the Songliao Basin, Northea...
Published 2020-11-01“…The new 8–13 m thick Lower Cretaceous Quantou Formation outcrop of the Songliao basin is a braided fluvial succession arranged in one large fining-upward cycle. …”
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4613
Inventory and Distribution Characteristics of Large-Scale Landslides in Baoji City, Shaanxi Province, China
Published 2021-12-01“…Regarding lithology, the regions covered by the Quaternary loess and Cretaceous gravels are the main areas where landslides occur. …”
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4614
The osteology of Periptychus carinidens: A robust, ungulate-like placental mammal (Mammalia: Periptychidae) from the Paleocene of North America.
Published 2018-01-01“…Periptychus is the archetypal genus of Periptychidae, a clade of prolific Paleocene 'condylarth' mammals from North America that were among the first placental mammals to radiate after the end-Cretaceous extinction, remarkable for their distinctive dental anatomy. …”
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4615
Re-examination of the cranial osteology of the Arctic Alaskan hadrosaurine with implications for its taxonomic status.
Published 2020-01-01“…The small morphological disparity may be related to the relatively low latitudinal temperature gradient during the latest Cretaceous compared to present day, a gradient which might not have imposed significant pressure for much morphological adaptations across a broad latitudinal range.…”
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4616
Structural reconstructions effect on oil and gas formation of the Yenisei-Khatanga trough eastern part
Published 2024-04-01“…Based on interpretation of geochemical information of the well-core and outcrops, the characterization of the type of organic matter, the amount of initial organic carbon, the oil and gas source potential for the Late Triassic, Lower Jurassic, Middle Jurassic, Upper Jurassic, Lower Cretaceous oil and gas source rocks is given. The results of exploration of the geological structure of the region, the geochemical features of oil and gas source rocks became the basis for building a 2D basin model, which made it possible not only to identify generation kitchen, migration routes and accumulation zones of hydrocarbon fluids, but also to estimate the start time of generation and emigration of hydrocarbons, as well as the moments of interruption of these processes during periods of uplifting of the territory. …”
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4617
Skeletochronology and Paleohistology of <i>Hyposaurus rogersii</i> (Crocodyliformes, Dyrosauridae) from the Early Paleogene of New Jersey, USA
Published 2021-10-01“…The paleohistology of dyrosaurids is known from a small sample, despite being common fossils and representing a rare lineage of crocodylomorphs that survived the Cretaceous–Paleogene extinction. Their lifestyle has been inferred only from sections of the snout, vertebrae, partial femur, and tibia. …”
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4618
Petrography, geochemistry and mineral chemistry of the Almogholagh intrusive rocks (Hamedan, Iran): Evidences for their shallow-level emplacement
Published 2018-11-01“…The igneous rocks of the Almogholagh pluton were injected in two periods in the Cretaceous (from 138 to 95 Ma). Syenites, Quartz syenites and alkali granites were infused in the second phase and the remaining rocks have developed in the first stage. …”
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4619
Significance and evolution characteristics of the isobutane/n-butane ratio of natural gas
Published 2020-03-01“…In this paper, the correlations between the isobutane/n-butane ratios, dryness of natural gases, and the R o values of source rocks of 77 gas samples from Cretaceous and Tertiary in Kuqa Depression, Tarim Basin, Triassic Xujiahe Formation in central Sichuan Basin, Carboniferous–Permian in Sulige and Yulin gas field, Ordos Basin, China, and 80 shale gas samples from Mississippian Barnett Shale in the Fort Worth Basin, the United States are analyzed to reveal the evolution of the isobutane/n-butane ratios, then mathematical models of the isobutane/n-butane ratios and R o are attempted to be established. …”
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4620
Temporal outline of geological heritage sites in the Western Caucasus
Published 2024-06-01“…The results show that the analyzed geosites shed light on the lengthy time span (from the late Proterozoic to the Quaternary), and the Cisuralian–Early Cretaceous sedimentary succession of the study area is represented with significant completeness. …”
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