Abstract：Fushun jet is a lignite variety with a low degree of coalification and mainly organic residue of plants. Its macerals mainly include textinite, corpohuminite, gelinite, resinite and cellulose. The quality of east-pit jet, mid-pit and west-pit jet decreased successively, as well as the content of the resinite in them, which are 30%, 25% and 10%, but their density increase in turn, which are 1.193, 1.196 and 1.289 g·cm-3 respectively. Under the fluorescence microscope, it is observed that the fluorescent substances in the Fushun jet include resinite and textinite, and there are two different types of resinite, namely α- resinite and β- resinite, while the content of textinite is little. The shape of α-resinite is mostly spindle shape, with uneven surface and contour, β-resinite's surface is uniform with a clear outline, and its shape is mostly circular, oval or spindle. In general, The content of α-resinite is lower, and the size of α-resinite is small. Moreover, the fluorescence intensity of α-resinite is significantly higher than β-resinite. Of east-pit jet α-resinite's content is about 10%, β-resinite's content is about 20%; Of mid-pit jet α-resinite's content is about 5%, β-resinite is about 20%; Of west-pit jet α-resinite's content is about 3%, β-resinite is about 7%. The results of photoluminescence spectra of two different types of resinite in the Fushun jet show that the spectrograms of α-resinite and β-resinite have multiple peaks, and their positions are relatively similar, which are 411~412, 524~528, 551~553, 583, 600 and 625 nm respectively, which only reflect a little difference in intensity. λmax of α-resinite is around 525 nm, FWHM is about 120 nm, the range of Q is 0.459~0.899, and its oxidation degree is low. λmax of β-resinite is around 553 nm, FWHM is about 180 nm, the range of Q is 0.919~1.30, and its oxidation degree is higher than α-resinite. Compared with Fushun amber's fluorescence spectrum, it was found that the λmax of Fushun Amber is around 434 nm, more significant than the two types of resinite in the Fushun jet but close to the weak fluorescence peak of resinite at 432 nm. It shows that the oxidation degree of resinite in the Fushun jet is higher than amber, so the jet should precede amber in the formation order.
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