搜索结果: 31-36 共查到“地质学 Cretaceous”相关记录36条 . 查询时间(0.056 秒)
Origin of the Mg-Smectite at the Cretaceous/Tertiary (K/T) Boundary at Stevns Klint, Denmark
K/Ar dating K/T boundary Rare earth elements Smectite
2011/12/30
The clay mineralogy and major element geochemistry of four distinct layers within the Cretaceous/Tertiary (K/T) boundary marl (i.e., II, IIIa, IIIb, and IV) at Stevns Klint, Denmark, including 搃mpact ...
Absence of Clay Diagenesis in Cretaceous-Tertiary Marine Shales, Campos Basin, Brazil
Diagenesis Illite Interstratified Nontronite Shale Smectite X-ray powder diffraction
2012/1/12
In Upper Cretaceous-Tertiary marine shales (Campos Formation) from the Campos basin, Brazil, mixed-layer illite/smectite (I/S) has remained randomly interstratified to depths of 3500 m and to temperat...
Relationship Between Illite/Smectite Diagenesis and Hydrocarbon Generation in Lower Cretaceous Mowry and Skull Creek Shales of the Northern Rocky Mountain Area
Diagenesis Hydrocarbon Illite/smectite Interstratification Maturation Pyrolysis Shale
2012/1/12
The percentage of expandable layers in illite/smectite (I/S) mixed-layer clay decreases with increasing temperature and depth in a section through marine Cretaceous shales in the Champlin 1 Hartley Fe...
Goyazite in Kaolinitic Altered Tuff Beds of Cretaceous Age Near Denver, Colorado
Diagenesis Goyazite Kaolinite Phosphorus Volcanic ash
2012/2/7
A hydrated alumino-phosphate mineral was identified in thin, kaolinitic clay beds of the Cretaceous Dakota Group and the overlying Mowry Shale in the Dakota hogback west of Denver, Colorado. It occurs...
Clays, Cations, and Geophysical Log Response of Gas-Producing and Nonproducing Zones in the Gammon Shale (Cretaceous), Southwestern North Dakota
Exchange cations Geophysical log Mixed layer Natural gas Shale Statistical analysis
2012/2/6
The Upper Cretaceous Gammon Shale has served as both source bed and reservoir rock for accumulations of natural gas. Gas-producing and nonproducing zones in the Gammon Shale are differentiated on the ...
Diagenesis of Clay Minerals from Lower Cretaceous Shales of North Eastern British Columbia
Diagenesis Clay Minerals Lower Cretaceous Shales North Eastern British Columbia
2012/2/15
Clay minerals from shale outcrops of the Lower Cretaceous Buckinghorse Formation (4250 ft thick) were investigated in order to assess their degree of diagenesis and their oil-generating potential. Cry...