... observed by SEM in the cement but not in the K-feldspar grains (these microfractures were not detectable by the 14 C-PMMA method). Fig. 13. A) BSEi, B) mineral map, C) corresponding autoradiograph, and D) corresponding porosity map of sample laj 27-10 (group 2, prodelta). Circles identify...

...Paul Sardini; Abderrazak El Albani; Dimitri Pret; Stéphane Gaboreau; Marja Siitari-Kauppi; Daniel Beaufort Abstract Microporous aggregates of kaolin minerals and illite are common products filling the intergranular volume (IGV) of deeply buried sandstones. Using BSEi (backscattered electron...

...Figure 5 A-J) Bivariant graphs for O (weight %) and excess O (atomic %) versus Si (weight %) for light and dark areas of backscattered electron image of samples A (A, B), B (C, D), C (E, F), and D (G, H). E (I, J). Quartz, analyzed by the same method, is shown for comparison. K, L) Comparison...

... overview of the potential and limitations of scanning electron microscopy in sediment fabric analysis was presented by A. T. Kearsley (Oxford Brookes University) who highlighted the expansion of the use of backscattered electron imagery (BSEI) in sedimentary petrography. He emphasized commonly overlooked...

... by standard bulk-sediment analysis, which destroys sedimentary fabrics and averages data within samples. Here we resolve and reconstruct seasonal-scale flux events from these sediments using backscattered electron imagery (BSEI) of resin-embedded sediment, a nondestructive technique that preserves...

... microanalysis of resin-embedded sediment. Together, the microfabric and geochemical methods enable the identification of clay layer mass transport deposits despite bioturbational mixing of the original end-members. Two cores with robust radionuclide chronologies contain correlative clay layers dated to 1979...

... undertaken by energy-dispersive X-ray methods (EDX) using a PGT IMIX system. Well-characterized synthetic and natural materials were used as standards. Although precision and repeatability are theoretically estimated at ±1% with X-ray total counts in excess of 100,000, the fine-grained nature of the minerals...

...Brian Jones; Robert W. Luth Abstract Finely crystalline Cenozoic island dolostones, like those found in the Cayman Formation on Grand Cayman, are commonly assumed to be petrographically and compositionally homogeneous. Backscatter electron images (BSEI), however, show that the constituent dolomite...

... into fluorite particles and micropores. * E-mail: [email protected] 17 12 2004 01 06 2005 © The Mineralogical Society 2005 F ig . 1. ( a ) BSEI collage of F1 feldspar ((001) section) and adjacent feldspar grains (F2, F3 and F4). CF: clear feldspar, PMP: patch...

... following the procedures of Weedon and Jenkyns (1999) . We located the spectral background via the robust autoregressive fitting method of Mann and Lees (1996) . This involved replacing the log-power versus frequency values with median values from a moving spectral window and then using least squares...

...-A to opal-CT transformation, largely because of the difficulty in measuring the total water content and identifying the different forms of water that are present. Historically, bulk sampling methods such as coulometric Karl-Fisher titration (e.g., Graetsch et al. 1985 ), loss on ignition (e.g., Nicholson...

... of a Pan-African Mobile Belt with Rb-Sr whole-rock ages of 520 Ma ( Lasserre et al. , 1984 ). A CHIME (Chemical Th-U-total Pb isochron method: Suzuki et al. , 1991 ) monazite age of 510±25 Ma was reported for sample I-4 by Tetsopgang et al. (1999) . F ig . 1. BSE images of pseudorutile...

... detail. We report here on the results of the study of one of these levels, the White Stone Band. Full details of preparation methods have been given by Pearson (2000) . The material used was from a pair of boreholes drilled 18 m apart in Swanworth Quarry, Dorset (SY 96757823). Polished resin-embedded...

... (centimeters to several meters) and member (tens of meters) scales. Because of the anisotropic nature of mudstones, elastic properties are not scalars at the length/thickness scales that can be defined using seismic methods. Properties of interest are likely to be different parallel to bedding compared...

... photographs and backscattered electron images (BSEI) of siderite in the Rutland Formation, Ketton, U.K. A) Field photograph of siderite rhizocretions descending from coal layer. B) BSEI of a section through a rhizocretion showing subhedral to anhedral zoned siderite crystals. C) BSEI of a siderite...

... and reflect changes in the local environment during crystallization. A LA-ICP-MS trace-element map was collected for a TSM grain from Woodjam that showed a particularly complicated BSEI (backscattered electron image), i.e ., a combination of concentric and “patchy” zoning, which some might call sector...

... Si = 0.60 and X Si = 0.61, and we propose that the eutectic composition is X Si = 0.61, which is also shown in a diagram of the melting phase relations in the later section with other results. Figure 5. Backscattered electron image (BSEI) of 1K3138 ( X Si = 0.60, 2400 °C) at the low...

.... Hence, techniques such as EPMA may not be sufficiently sensitive to enable detection of all activators, sensitizers and quenchers, leading to only partial understanding of the CL. Methods such as secondary ion mass spectrometry (SIMS), proton induced X-ray emission (PIXE) and laser ablation-inductively...

... and 686 from ODP and Darwin cruises (modified after Suess er al. 1988). studied; ODP Site 686 from the West Pisco Basin, and Sites ODP 68O/Darwin 38.10 and ODP 68l/Danvin 38.09 from the Salavery basin (Fig. 1). Methods Backscattered electron imagery (BSEI) was used to examine undisturbed sediment fabric...