scholarly journals Geophysical log characterization of the Flamborough Chalk Formation (Late Cretaceous, Santonian – Early Campanian), East Yorkshire, UK: implications for understanding the onshore and offshore occurrence of the Late Campanian Rowe Chalk Formation

2018 ◽  
Vol 62 (3) ◽  
pp. 201-209 ◽  
Author(s):  
M. A. Woods
Keyword(s):  
Late Cretaceous ◽  
Geophysical Log

Geomechanical aspects of induced microseismicity during CO2 injection in Illinois Basin

2021 ◽  
Vol 40 (11) ◽  
pp. 823-830
Author(s):  
Nikita Bondarenko ◽  
Sherilyn Williams-Stroud ◽  
Jared Freiburg ◽  
Roman Makhnenko
Keyword(s):  
Oil Field ◽  
Co2 Injection ◽  
Low Permeability ◽  
Illinois Basin ◽  
Petrographic Analysis ◽  
Flow Properties ◽  
Geomechanical Characterization ◽  
Fluid Penetration ◽  
Geophysical Log

Carbon sequestration activities are increasing in a global effort to mitigate the effects of greenhouse gas emissions on the climate. Injection of wastewater and oil-field fluids is known to induce seismic activity. This makes it important to understand how that risk relates to CO2 injection. Injection of supercritical CO2 into the Cambrian Mt. Simon sandstone in Illinois Basin induced microseismicity that was observed below the reservoir, primarily in the Precambrian crystalline basement. Geomechanical and flow properties of rock samples from the involved formations were measured in the laboratory and compared with geophysical log data and petrographic analysis. The controlling factors for induced microseismicity in the basement seem to be the hydraulic connection between the reservoir and basement rock and reactivation of pre-existing faults or fractures in the basement. Additionally, the presence of a laterally continuous low-permeability layer between reservoir and basement may have prevented downward migration of pore pressure and reactivation of critically stressed planes of weakness in the basement. Results of the geomechanical characterization of this intermediate layer indicate that it may act as an effective barrier for fluid penetration into the basement and that induced microseismicity is likely to be controlled by the pre-existing system of faults. This is because the intact material is not expected to fail under the reservoir stress conditions.

Geochemical and elemental characterization of rostrum and alveolus parts of Belemnite fossil from the Late Cretaceous formation, Tamil Nadu, India

2021 ◽  
Vol 14 (18) ◽  
Author(s):  
Neetu Mohan ◽  
Sugumar Vasudevan ◽  
Paramasivam Chellamuthu Ranganathan ◽  
Anandhan Narayanasamy
Keyword(s):  
Late Cretaceous ◽  
Tamil Nadu ◽  
Elemental Characterization

Amber from México: Coahuilite, Simojovelite and Bacalite

2014 ◽  
Vol 1618 ◽  
pp. 169-180 ◽  
Author(s):  
Francisco Riquelme ◽  
José Luis Ruvalcaba-Sil ◽  
Jesús Alvarado-Ortega ◽  
Emilio Estrada-Ruiz ◽  
Martin Galicia-Chávez ◽  
...  
Keyword(s):  
Late Cretaceous ◽  
Physicochemical Analysis ◽  
New Variety ◽  
Southern Mexico ◽  
Geological Record ◽  
Ftir Microspectroscopy ◽  
Fossil Resin ◽  
Emended Description ◽  
Northwestern Mexico

ABSTRACTCoahuilite, a new variety of amber is described from the Late Cretaceous Olmos Formation (ca. 73 Ma.), Coahuila, north of México. This amber is totally distinct chemically and stratigraphically from the Miocene Chiapas amber (ca. 23-13 Ma.), Southern México, which according to mineral nomenclature is currently known as Simojovelite var. nov. Additionally, an emended description of Bacalite is proposed, based on the physicochemical analysis and geological record of a fossil resin recently recovery from the Late Cretaceous El Gallo Formation (ca. 73 Ma.), Baja California, northwestern México. The results are supported by characterization of such ambers using synchrotron-based Infrared (FTIR) microspectroscopy.

scholarly journals Palaeoenvironmental characterization of a crocodilian nesting site from the Late Cretaceous of Brazil and the evolution of crocodyliform nesting strategies

2016 ◽  
Vol 457 ◽  
pp. 221-232 ◽  
Author(s):  
Júlio C. de A. Marsola ◽  
Alessandro Batezelli ◽  
Felipe C. Montefeltro ◽  
Gerald Grellet-Tinner ◽  
Max C. Langer
Keyword(s):  
Late Cretaceous ◽  
Nesting Site
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