The AAPG/Datapages Combined Publications Database
AAPG Bulletin
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AAPG Bulletin; Year: 2021; Issue: August DOI: 10.1306/02262118214
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Figure 5.
Backscattered electron (BSE) and scanning electron microscopy (SEM) images and energy-dispersive x-ray spectroscopy (EDS) spectrum of inherited chlorite (chlor) rosettes and rims coating detrital quartz (qtz) grains. (A–C) Increasing magnification (mag) of the same location. (A) A BSE image showing rims coating detrital qtz grains. The mag is 2600×. (B) A higher mag of image (A) showing the stacked-rim morphology. The mag is 10,000×. (C) The SEM image of (B). The mag is 20,000×. (D) The EDS spectrum of the inherited rim yielding Fe-rich chlor. Major elemental peaks of Si, Al, and Fe as well as minor amounts of Mg reflect the chemical composition of chlor ((Mg, Al, Fe)12[(Si, Al)8O20](OH)16). The high C peak is the result of C coating during sample preparation. det = detector; HV = high voltage; vCD = low voltage–high contrast detector; WD = working distance.
Figure 5. Backscattered electron (BSE) and scanning electron microscopy (SEM) images and energy-dispersive x-ray spectroscopy (EDS) spectrum of inherited chlorite (chlor) rosettes and rims coating detrital quartz (qtz) grains. (A–C) Increasing magnification (mag) of the same location. (A) A BSE image showing rims coating detrital qtz grains. The mag is 2600×. (B) A higher mag of image (A) showing the stacked-rim morphology. The mag is 10,000×. (C) The SEM image of (B). The mag is 20,000×. (D) The EDS spectrum of the inherited rim yielding Fe-rich chlor. Major elemental peaks of Si, Al, and Fe as well as minor amounts of Mg reflect the chemical composition of chlor ((Mg, Al, Fe)12[(Si, Al)8O20](OH)16). The high C peak is the result of C coating during sample preparation. det = detector; HV = high voltage; vCD = low voltage–high contrast detector; WD = working distance.