vitrinite


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vitrinite

[′vi·trə‚nīt]
(geology)
A maceral group that is rich in oxygen and composed of humic material associated with peat formation; characteristic of vitrain.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Results of Petroleum System (PSM) indicated that shales of the Sembar Formation are in the thermal window for gas and oil generation with an average maturity of vitrinite reflectance (Ro) of 1.9 %.
As Figure 5 reveals, the samples were in the immature to low-maturity stage, which is equivalent to the vitrinite reflectance ([R.sub.o]) of about 0.65% [R.sub.o] [16].
One of the simplest models for the coke quality prediction was based on the mean vitrinite reflectance and the inertinite content in the parent coals (Miura, 1978).
[13] investigated the coal samples at the vitrinite reflectance of 0.24~0.65% using mercury porosimetry and isothermal adsorption.
In addition, maximum vitrinite reflectance measurements and proximate, ultimate, and maceral composition and coal ash composition analyses were performed following the GB/T 6948-2008, GB/T 2122008, GB/T 476-2001, GB/T 8899-1998 and GB/T 1574-2007 standard procedures, respectively.
Geolmage is CRAIC Technologies' newest Vitrinite Reflectance Measurement System and is designed to determine the grade of coal and coke by vitrinite reflectance per the ISO 7404-5 and ASTM D2798 standards.
Synrift to early postrift basin-scale groundwater history of the Newark basin based on surface and borehole vitrinite reflectance data.
Mean vitrinite reflectance [24], heat value, volatile matter of the coals [25], and fuel ratio [26] are commonly used as simple indices for burnout prediction.
In the Lusitanian Basin, kerogen assemblages are dominated by marine amorphous organic matter, with Rock-eval pyrolysis having S2 values >10 mg HC/g rock, Hydrogen Index averaging 355 mg HC/g TOC but the sampled rocks have [T.sub.max] below 437[degrees]C and average vitrinite reflectance of 0.43% [R.sub.o], indicating that they are thermally immature or very early mature (Duarte et al, 2012).