搜索结果: 1-15 共查到“理学 Basalt”相关记录16条 . 查询时间(0.062 秒)
Evidence for the solar wind in lunar magmas: A study of slowly cooled samples of the Apollo 12 olivine basalt suite
hydrogen isotopes melt inclusions mare basalts SIMS lunar olivine
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2017/4/10
While it is now recognized that the Moon has indigenous water and volatiles, their total abundances are unclear, with
current literature estimates ranging from nearly absent to Earth-like levels. Sim...
Study on the limitations of travel-time inversion applied to sub-basalt imaging
travel-time inversion sub-basalt imaging
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2015/1/5
The difficulties of seismic imaging beneath high velocity structures are widely recognised. In this setting, theoretical analysis of synthetic wide-angle seismic reflection data indicate...
East-west mantle geochemical hemispheres constrained from Independent Component Analysis of basalt isotopic compositions
mantle isotope domain basalt supercontinent
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2017/4/11
In order to decipher the mantle geochemical heterogeneity that reflects material differentiation and circulation within
the Earth, we examined mid-ocean ridge basalts (MORB), ocean island basalts (OI...
Event-based sub-basalt depth imaging applied to marine seismic data from north of Shetland,UK
Event-based sub-basalt depth marine seismic data north of Shetland
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2009/12/2
Seismic wave propagation in media with high-velocity layers (basalts) can be described as an interference of various events commonly referred to as wave types or modes. Proposed here is the event-base...
Coring basalt under Mars low pressure conditions
Coring basalt Mars low pressure conditions
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2009/6/1
We report and evaluate drilling results in hard basalt under Mars low pressure conditions and introduce an equation that may be used to estimate drilling performance in hard formations.
Combining [3He] cosmogenic dating with U–Th/He eruption ages using olivine in basalt
U–Th/He cosmogenic helium Snake River Basalts Idaho olivine
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2014/4/8
This paper presents new U–Th/He crystallization and 3He exposure ages on olivine for a suite of basalt samples from the Snake River Plain, Idaho. The results provide the first demonstration that U–Th/...
Iron Oxides in a Soil Developed from Basalt
Hematite Ilmenite Maghemite Magnetic Fraction Mossbauer Spinel
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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
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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
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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
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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
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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
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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
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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
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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
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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 ...