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Iron Oxides in a Soil Developed from Basalt
Hematite Ilmenite Maghemite Magnetic Fraction Mossbauer Spinel
2011/12/8
Abstract: A dusky red Oxisol forming on a tholeiitic basalt is found to contain varying proportion of aluminous hematite (Hm) and titanoaluminous maghemite (Mh) in the different size fractions. Maghem...
Characterization of carbon compounds on a pyroxene surface from a gabbro xenolith in basalt by time-of-flight secondary ion mass spectrometry
Characterization carbon pyroxene surface gabbro xenolith time-of-flight
2012/3/31
Time-of-flight secondary ion mass spectrometry (TOF-SIMS) yields mass spectra of the upper several monolayers of an analytical surface. The applicability of TOF-SIMS to the characterization of C compo...
Hydrothermal Alterations of Hisingerite Material from a Basalt Quarry Near Geelong, Victoria, Australia
Basalt Deuteric alteration Hisingerite Hydrothermal treatment Nontronite Saponite
2012/1/9
To understand the genetic relationship between hisingerite material in the joints of an overlying grey basalt and nontronite and Fe-rich saponite in the joints and matrix of a more deuterically altere...
Sodic Clay-Zeolite Assemblage in Basalt at Boron, California
Analcime Boron Cation exchange Clinoptilolite Gmelinite Heulandite Phillipsite Saponite Sodium Zeolite
2012/1/9
An assemblage of clay minerals, Na-zeolites, Fe- and Sb-sulfides, and borates occurs in cavities in the basalt flow that underlies the main borax ore body exposed by the U.S. Borax open pit at Boron, ...
Weathering of Basalt: Formation of Iddingsite
Goethite Iddingsite Iron Olivine Scanning electron microscopy Transmission electron microscopy Weathering
2012/1/11
The formation of iddingsite by the oxidative weathering of Fo80 olivine begins by solution of Mg from planar fissures, 20 Å wide and spaced 200 Å apart, parallel to (001). Oxidation of Fe ...
Hydrothermal Treatment of Smectite, Illite, and Basalt to 460°C: Comparison of Natural with Hydrothermally Formed Clay Minerals
Basalt Berthierine Hydrothermal Illite Smectite Stability
2012/1/11
Wyoming bentonite, Fithian illite, and basalt from the Umtanum Formation, Washington, were treated hydrothermally at 200° to 460°C and 260 to 500 bars for 71 to 584 days. No change was detected for th...
Weathering of Basalt: Changes in Rock Chemistry and Mineralogy
Basalt Core-stone Element mobilization Goethite Halloysite Smectite Weathering
2012/1/10
The weathering of eastern Australian basalts, sampled from the rounded, hard, core-stone to the rind of softer weathered material, has been examined by bulk chemical analyses, thin section petrography...
Hisingerite Material from a Basalt Quarry Near Geelong, Victoria, Australia
Electron diffraction Hisingerite Infrared spectroscopy Iron Saponite Transmission electron microscopy
2012/2/6
A material resembling what has been described in the literature as hisingerite has been identified in the joints of Cenozoic grey basalt near Geelong, Victoria. The material gives an X-ray powder diff...
Composition and Origin of Smectite in Soils Derived from Basalt in Northern Ireland
Basalt Octahedral occupancy Selective dissolution Smectite Soil Weathering
2012/2/8
The sand and silt fractions of soils derived from Tertiary basalt in northeastern Ireland exhibit unusually high cation-exchange capacities. Smectite was identified by X-ray powder diffraction in all ...
Imogolite and Allophane Formed in Saprolite of Basalt on Maui, Hawaii
Imogolite Allophane Saprolite Basalt
2012/2/20
Inorganic gel and allophane collected from basaltic saprolite on Maui, Hawaii, and studied by Patterson in 1964 were reexamined. The main constituent of the gel is imogolite, and gibbsite and allophan...