搜索结果: 1-9 共查到“矿床学与矿相学 Tertiary”相关记录9条 . 查询时间(0.015 秒)
Occurrence of Clinoptilolite and Mordenite in Tertiary Calc-Alkaline Pyroclastites from Sardinia (Italy)
Clinoptilolite Fluid/Rock Interaction Mordenite Opal-CT Tertiary Pyroclastic Flows
2011/12/7
Abstract: Clinoptilolite and mordenite occur as diagenetic products of medium-grained, moderately welded and poorly sorted pyroclastic flows belonging to the Tertiary calc-alkaline volcanism of Sardin...
Origin and Clay-Mineral Genesis of the Cretaceous/Tertiary Boundary Unit, Western Interior of North America
Claystone Ejecta Glass alteration Halloysite Kaolinite K/T boundary unit Meteorite impact SEM XRD
2011/12/1
Abstract: A 3-cm-thick, two-layered clay unit that records mineralogic and textural evidence of a catastrophic event that occurred at a time now marked as the end of the Cretaceous Period was preserve...
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 ...
Burial Diagenesis in Two Montana Tertiary Basins
Diagenesis Illite Illite/smectite Smectite Tarasovite Volcaniclastic
2011/12/31
Samples from initially smectite-rich Tertiary continental volcaniclastic sediment from the Deer Lodge and Big Hole basins of southwestern Montana show a general decrease in illite/smectite (I/S) expan...
Mineral Assemblages of Volcanic and Detrital Partings in Tertiary Coal Beds, Kenai Peninsula, Alaska
Chlorite Coal partings Crandallite Illite Kaolinite Opal-CT Smectite Volcanic ash
2011/11/30
Abstract: Volcanic and non-volcanic partings are exposed in coal beds of the Tertiary Beluga and Sterling Formations along the shores of the Kenai lowland, Alaska. About two-thirds of the partings ori...
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...
Mixed-Layer Illite/Smectite Minerals in Tertiary Sandstones and Shales, San Joaquin Basin, California
Carbonate cementation Illite/smectite Microprobe analysis Mixed layer Smectite Time-temperature index
2012/1/11
The southern San Joaquin Valley contains more than 7 km of sedimentary fill, largely Miocene and younger in age. Ancient depositional environments ranged from alluvial fans at the basin margins to tur...
Palygorskite from Tertiary Formations of Eastern Saudi Arabia
Palygorskite Eastern Saudi Arabia
2011/11/4
The occurrence of palygorskite in some Tertiary sediments in eastern Saudi Arabia was studied. Mineralogical analyses were made of samples from two sections
several meters thick from the Umm er Radhu...
A Comparative Study of the Diagenetic Alteration of Clay Minerals in Mesozoic Shales from Papua, New Guinea, and in Tertiary Shales from Louisiana, U.S.A.
Diagenetic Alteration Clay Minerals Mesozoic Shales
2011/11/17
Abstract: Gradual change from 60% montmorillonite/40% illite randomly interstratified clay minerals at 3500 ft depth to 20% montmorillonite/80% illite at 10,200 ft can be observed in a complete sectio...