exinite


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exinite

[′ek·sə‚nīt]
(geology)
A hydrogen-rich maceral group consisting of spore exines, cuticular matter, resins, and waxes; includes sporinite, cutinite, alginite, and resinite. Also known as liptinite.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Caption: FIGURE 5: Organic constituent (a) and P-A-E ternary diagrams of Wenchang source rocks (b) and Enping source rock (c) (P: higher terrestrial plant; A: amorphous organic matter and alginite; E: exinite and sporonin).
The results show that relatively abundant exinite rich in hydrogen results in oil-prone Types-I-[II.sub.1] of organic matter in deep lacustrine facies, while relatively abundant vitrinite results in gas and condensate-prone Types-III-[II.sub.2] of organic matter in shore-shallow lacustrine and swamp facies.
Samples Haitian Tucheng Yuni [R.sub.o,max] (%) 0.73 1.04 1.28 Vitrinite (%) 95.54 87.42 85.77 Inertinite (%) 0.97 3.56 0.38 Exinite (%) 2.91 8.54 11.39 Mineral (%) 0.58 0.48 2.47 [M.sub.ad] (%) 3.28 0.98 1.12 [A.sub.d] (%) 3.65 7.09 6.07 [V.sub.ad] (%) 33.34 34.07 23.96 Samples Linyuan Jinjia [R.sub.o,max] (%) 1.53 2.06 Vitrinite (%) 89.67 93.95 Inertinite (%) 0.19 -- Exinite (%) 9.37 5.68 Mineral (%) 0.76 0.38 [M.sub.ad] (%) 0.96 1.01 [A.sub.d] (%) 4.17 8.97 [V.sub.ad] (%) 17.27 13.45 Table 2: Pore volumes of the untreated and C[S.sub.2]-treated coals.
Methane adsorption in coal is controlled by internal factors, including coal rank, macerals (vitrinite, exinite, and inertinite), and pore size distribution [1, 26, 29, 30, 32], and influenced by external factors, such as temperature, pressure, and humidity [26, 33, 34].
The [R.sub.o,max] value is 0.43, with values of 75.3% for vitrinite, 18.6% for inertinite, 2.7% for exinite, and 5.3% for minerals [57].
The purpose of testing was to determine the percentage of the total organic components of rocks and the proportion of sapropel component, exinite, vitrinite and inertinite in the total organic matter.
The contents of vitrinite, inertinite, exinite, and minerals are 22.8%, 68.1%, 2.2%, and 6.9%, respectively.
Organic petrographic results for the Kabalar Formation [23] Sample Amorphous Exinite, Vitrinite, Oxidized SCI * + algae, % % % materials, % DH-30 15 80 -- 5 2.5-3 DH-33 95 5 -- -- 3 DH-37 95 5 -- -- 3 DH-44 95 5 -- -- 2.5-3 DH-47 100 -- -- -- 3 DH-55 95 5 -- -- 3 DH-60 100 -- -- -- 3 DH-62 100 -- -- -- 3 DH-64 100 -- -- -- 3 DH-67 90 10 -- -- -- DH-98 100 -- -- -- 3 DH-102 95 5 -- -- 3 DH-103 100 -- -- -- 3 DH-105 100 -- -- -- 3 DH-110 100 -- -- -- 3 HD-14 100 -- -- -- 3 HD-17 100 -- -- -- 3 HD-21 100 -- -- -- 3 HD-23 -- -- -- -- 2.5 HD-25 100 -- -- -- 2.5-3 HD-27 100 -- -- -- 3 HD-29 100 -- -- -- 3 HD-32 85 15 -- -- 3 HD-45 100 -- -- -- 3 HD-50 100 -- -- -- -- * SCI--Spore Color Index Table 3.
In general, the densities of vitrinite, inertinite, and exinite change with the rank of coal.
According to the genetic type, organic macerals can be further divided into vitrinite, inertinite, and exinite, among which certain physical differences can be observed.