搜索结果: 136-144 共查到“理学 rocks”相关记录144条 . 查询时间(0.027 秒)
Zeolites in Pre-Caldera Pyroclastic Rocks of the Santorini Volcano, Aegean Sea, Greece
Clinoptilolite Diagenesis Mordenite Pyroclastic Tuff Zeolite
2012/1/6
The vitric matrix of pre-caldera acid tuff and tuff breccia of the Santorini volcano, Aegean Sea, Greece has been generally replaced by one or more of the following authigenic minerals: K-rich and (K,...
PALYGORSKITE IN THE EOCENE ROCKS OF THE DAMMAM DOME, SAUDI ARABIA
Dedolimitization Diagenesis Palygorskite Petrography Saudi Arabia Scanning electron microscopy X-ray powder diffraction
2011/11/4
Clay mineralogy and petrography of the Early to Middle Eocene succession of the Dammam dome, Saudi Arabia, comprising the Rus and Dammam Formations, were studied using X-ray powder diffraction, light ...
Chemical Weathering of Crystalline Rocks in the Catchment Area of Acidic Ticino Lakes, Switzerland
Acid precipitation Aluminum hydroxide Gneiss Iron hydroxide Weathering
2012/1/10
Atmospheric acidic deposition introduces hydrogen ions to terrestrial and aquatic ecosystems, which become partially neutralized by chemical weathering. In the southern Alps of Switzerland, small catc...
Weathering of Chlorite and Vermiculite in Ultramafic Rocks of Cabo Ortegal, Northwestern Spain
Chlorite Hydroxy-Al Serpentinite Smectite Vermiculite Weathering X-ray powder diffraction
2012/1/9
Chloritic veins in serpentinite and their weathering products were analyzed by X-ray powder diffraction (XRD) and X-ray fluorescence spectrometry (XRF). Chlorite formed during the Hercynianage orogene...
Quantitative Clay Mineralogical Analyses from the Bulk Chemistry of Sedimentary Rocks
Mudstones Sedimentary
2012/2/10
A technique suitable for computer application has been developed whereby whole rock major element analyses are corrected for X-ray detectable nonclay minerals and used to set up simultaneous equations...
Four chlorite polytypes of Bailey and Brown (1962) have been identified by X-ray diffraction in clay-size chlorites of soils, sediments, and sedimentary rocks: (1) IIb, the polytype of common metamorp...
The Determination of Quartz in Sedimentary Rocks Using an X-Ray Diffraction Method
Determination Quartz Sedimentary Rocks X-Ray Diffraction Method
2012/2/21
An X-ray diffraction method for determining quartz in sediments is described which is both rapid and precise, with a coefficient of variation of 1·9 per cent. Samples are ignited at 950∑C prior to X-r...
Clay Minerals in Hydrothermally Altered Rocks at Wairakei, New Zealand
Clay Minerals Hydrothermally Rocks Wairakei
2012/2/21
Geothermal fluid discharged by steam wells, which have been core drilled to depths as much as 4500 ft at Wairakei, New Zealand, has altered Pliocene to Pleistocene, silicic, mainly glassy volcanics an...
LAYERED BASIC INTRUSIVE ROCKS OF THE WICHITA MOUNTAINS, S.W. OKLAHOMA
LAYERED BASIC INTRUSIVE ROCKS THE WICHITA MOUNTAINS S.W. OKLAHOMA
2014/4/8
Basic igneous rocks crop out along the axis of the Wichita Mountains of southeastern Oklahoma. Five stratigraphic units have been distinguished on the basis of mineralogical and textural features. The...