Results 51 to 60 of about 25,995 (207)
Notable Impact of Paleotectonic Stress on Gold Mineralisation in the West Qinling Orogen
Geological Journal, EarlyView.By applying fuzzy clustering and multiple inverse methods, we systematically processed the data of vein and fault slip in this ore deposit to reveal the transition of orogenic geological environment and paleotectonic stress field. Our research results show two different stress states: the northwest–southeast extensional stress field and the northeast ...
Hongyan Wang +3 more
wiley +1 more source
Silica diagenesis promotes early primary hydrocarbon migration [PDF]
, 2019 We present evidence that hydrocarbon source rocks can be preconditioned for primary hydrocarbon migration at an early stage of catagenesis by pore-scale processes linked to silica diagenesis.
core +1 more source
Geological Journal, EarlyView.This study reports the exceptional preservation of the Eocene freshwater bivalve Batissa sitakaraensis from Hokkaido, Japan. Multimodal analyses reveal that both the aragonitic shell mineralogy and the delicate organic periostracum retain their original structural and chemical characteristics after millions of years.
Taro Yoshimura +4 more
wiley +1 more source
Deposition, diagenesis, and reservoir development of the Cretaceous Lidam formation, SE Sirt Basin, Libya. [PDF]
, 2007 This study concentrates on the deposition, diagenesis and reservoir characteristics of the Upper Cretaceous (Cenomanian) Lidam Formation. Core, petrography and geochemical data were studied from five wells (P3-97, N6-97, R1-97， 3V1-59E, and 3V3-59E) in ...
Abugares, Miloud M.
core
Geological Journal, EarlyView.This study reveals that the underexplored Benin Basin features a narrow shelf and steep slope, which promoted the development of multi‐phase, stacked channel‐lobe complexes. These gravity flow deposits, further enhanced by bottom current reworking, reveal a significant undiscovered Upper Cretaceous stratigraphic play with considerable petroleum ...
Liu Zuodong +4 more
wiley +1 more source
Geological Journal, EarlyView.Chemical states of Se and Br atoms in the KPg boundary sediments from Stevns Klint were studied using XAFS spectroscopy. The high concentrations of Se4+ could become an index of the degree to which the global environment was soiled with dust and ash derived from impact ejecta or volcanic eruptions.
Kei‐ichiro Murai +5 more
wiley +1 more source
Deposition and Diagenesis of Subtropical Microbial Carbonates [PDF]
, 2017 The primary objective of this dissertation is to characterize freshwater microbial palustrine deposits, and assess how their textures and geochemical characteristics change over various stages of early burial and diagenesis in order to assess their ...
Pederson, Chelsea
core +1 more source
Youqi dizhi yu caishouluThe diagenesis and evolution of organic-rich shale have an important influence on the characteristics of shale reservoirs， but the relationship between diagenesis and reservoir characteristics of organic-rich shale in the Second Member of Kongdian
FENG Guozheng +7 more
doaj +1 more source
Role of authigenic clay minerals in preserving primary porosity and permeability of the sandstone hydrocarbon reservoirs [PDF]
Journal of Stratigraphy and Sedimentology Researches, 2019 Among different diagenetic alterations, quartz cements are the foremost porosity and permeability destroying cement in deeply buried (>2 km) sandstones.
Masoumeh Kordi
doaj +1 more source
Diagenetic Study of Marrón Emperador Ornamental Stone (Upper Cretaceous, SE Spain)
Applied Sciences, 2023 The “Marrón Emperador” ornamental stone is known for its characteristic deep brown colour filled with white spots and veins. It consists of a brecciated dolostone with different generations of calcite/dolomite veins and veinlets that represent repeated ...
María Concepción Muñoz-Cervera +1 more
doaj +1 more source