Porosity Evolution of the Early Cretaceous, Qamchuqa Formation in northeastern part, Iraq by Abdalratha Mohammed sahaab

Get full text

Ecosystem changes after Early Cretaceous seawater intrusion into the proto-South Atlantic Ocean by Jian Ma, Leonardo F. Cury, Anelize M. B. Rumbelsperger, Heidi L. Albrecht, Erwin W. Adams, Joachim E. Amthor, Xingqian Cui, Antoine Crémière, Kei Sato, Kristin D. Bergmann, Roger E. Summons

Get full text

New or poorly known Neocomitidae (Ammonitina, Ammonoida) from the lower Hauterivian sedimentary series of the Jura platform and the Vocontian trough (France and Switzerland) by Antoine Pictet, Luc Georges Bulot

Subjects: “…Early cretaceous…”
Get full text

Geochronology and geochemistry of the Neoproterozoic–Mesozoic intrusive rocks in the Xinlin area, northeastern China: new constraints on the tectonic evolution of the Erguna block... by Sheng Lu, Sheng Lu, Sheng Lu, Sheng Lu, Chenglu Li, Masroor Alam, Zhichao Song, Xiannan Zhu, Anzong Fu, Wenpeng Yang

“…In contrast, the Late Carboniferous, Early Permian, Late Triassic–Early Jurassic, and Early Cretaceous intermediate–acidic intrusive rocks display high Rb/Sr contents, low Mg#, and strongly negative Eu anomalies, indicating derivation from the partial melting of the lower crust. …”
Get full text

Amethyst Deposits of the Los Catalanes Gemological District (Artigas Department): The First Uruguayan IUGS Geological Heritage Site by César Goso, Mauricio Faraone

“…It is part of one of the most important continental flood volcanism episodes on Earth (end of Jurassic to Early Cretaceous). The Paraná igneous province, a dominant tholeiitic basaltic and scarce acidic province that extends into parts of Brazil, Paraguay, Argentina and Uruguay, contains amethyst and agate deposits of unique international significance because of frequent mega-geode concentration, enormous reserves, and gemstone quality of varied size and forms. …”
Get full text

3D Seismic Structural Analysis and Basin Modeling of the Matruh Basin, Western Desert, Egypt by Farouk I. Metwalli, El Arabi H. Shendi, Bruce Hart, Waleed M. Osman

“…Burial history and subsidence curves show that the basin experienced a tectonic subsidence through the Middle-Late Jurassic and Early Cretaceous times. Thermal maturity models indicated that Cenomanian clastics of the Bahariya Formation are in the early mature stage in the east portions of the area, increasing to the mid maturity level in the southwestern parts. …”
Get full text

A «necklace» of large clusters of strategic raw materials over a stagnant oceanic slab in East Asia by Natalia Boriskina

“…An analysis of geological-geophysical, metallogenic, geochronological, and seismic tomographic studies in territories joining Southeast Russia, East Mongolia, and Northeast China led to the conclusion that deep geodynamics significantly influenced the formation of highly productive ore-magmatic systems in the Late Jurassic-Early Cretaceous. This influence was likely manifested through the initiation of decompression processes around stagnant slab boundaries in the Late Mesozoic. …”
Get full text

A comparative petrophysical evaluation of the Abu Roash, Bahariya, and Kharita reservoirs using well-logging data, East El-Fayoum, Egypt by Mohamed Osman Ebraheem, Hamza Ahmed Ibrahim, Ahmed Hosny Senosy

“…Therefore, this study emphasizes the application of petrophysical evaluation to sandstone and carbonate reservoirs from the late and early Cretaceous. These formations are the most potential hydrocarbon reservoirs in the studied area as a part of the western desert. …”
Get full text

Differential Characteristics and the Main Controlling Factors of Shale Oil Sweet Spot Reservoirs in Lucaogou Formation, Jimsar Sag, Junggar Basin by Jingmin Wang, Denglin Han, Yuan Deng, Wei Lin, Ao Su, Chenchen Wang, Jizhen Zhang, Juan Zhang

“…Geochemical data such as inclusions indicate that hydrocarbon generation began in the Triassic, and a large number of hydrocarbons were charged in the Middle-Late Jurassic-Early Cretaceous. As the key fluid that triggers reservoir dissolution modification, it is mainly derived from organic acids generated by thermal evolution of source rocks within shale formations. …”
Get full text

Natural Gas Accumulation Characteristics in the Linxing Area, Ordos Basin, NW China: Revealed from the Integrated Study of Fluid Inclusions and Basin Modeling by Yong Shu, Shuxun Sang, Yuxiang Lin, Huiming Zheng

“…The period from the Middle Jurassic to the Early Cretaceous is the key period for rapid pressure accumulation in the Upper Paleozoic reservoirs, which is consistent with the period of natural gas accumulation. …”
Get full text

Research on the Oil-Bearing Difference of Bedding Fractures: A Case Study of Lucaogou Formation in Jimsar Sag by Jia Lu, Chen Zhang, Jianhui Zeng, Haowei Yuan

“…Inclusion temperature measurement indicates that the bedding fractures there formed in or after Early Cretaceous. Hence, by matching the mass hydrocarbon generation period of the source rocks with the formation period of the bedding fractures, we discovered that the bedding fractures formed within the mass hydrocarbon generation period, which favored the oil-bearing of these fractures. …”
Get full text