第34卷，第9期 2014年9月
光谱学与光谱分析 Spectroscopy and Spectral Analysis
Vol.34,No.9-pp2439-2443 September, 2014
Micro-Raman Spectral Characteristics and Implication of FeS 2 from
Augen Granites in West Of Guangdong AN Yan-feil-2, ZHONG Li-li’, JIANG Da-peng
1. School of Resources and Environmental Engineering , Anhui University , Hefei 230601 , China
2 . Key Lab of Geological Process and Mineral Resource Survey of Guangdong , Guangzhou 510275 , China
3 . Research Institute , Shenzhen Branch of China National Offshore Oil Corporation Limited , Guangzhou 510240 , China AbstractSome FeS2 samples among Augen granite from Guanshanzhang mass in the west of Guangdong Prov -ince were retrieved to characterize the spectral signature of Raman . The results show that three distinct scat-tering modes active of Fe-[S - Liberational Motion （E, ), Fe-[Se F- Stretching Motion （Ag) and S—S Stretching Motion (T, ) are observed from all samples . Detailed analyses indicate that Raman shift (△v), Modes intensity (I) and full width at half maximum (FWHM ) are different between each type pyrite . The spectra show that there are three peaks respectively about 318 cm" (x ), 381 cm (u ) and 440 cm (u ) in Banded pyrite and three peaks in others samples about 344 cm1 (△× ), 379 cm (△× ) and 430 cm (△× ). Under compression to Alterated pyrite , all modes (E, , A, and T, ) shift continuously to higher frequencies from Deformed samples to Euhedral type . E, mode is much intenser than Ag mode as well as the latter is in -tenser than T, mode too in Banded samples (Ie, 》> I, 》> Ir, ), the intensity of Ag mode is higher than Eg mode and the latter is much higher than T, mode in other samples ( Is, > Ir, 》> /r, ). Compared with Alterated py -rite , all modes of E, , A, and T, intense continuously to higher frequencies from Euhedral samples to Deformed type . Those spectral characteristies above evidence that , the Raman shift and intensity of Banded samples is similar to marcasite , while those of others show characteristics of the pyrite . The crystallization temperature of Euhedral pyrite is higher than Deformed as well as Euhedral is higher than Alterated too . The formation pres-ea e a o se es i aeia e a s saes eae o n one too . Thus , The authors' studies suggest that the forming conditions of FeS: in Guanshanzhang mass expe-rienced marcasite period→high-pressure pyrite period→high-temperature pyrite period→Alterated pyrite peri. od.
Keywords Raman ; Pyrite ; marcasite ; Augen granite + Qinzhou-hangzhou belt
中图分类号：P614，0433
Introduction
文献标识码：A
The granitic rocks occurred extensively astride the border
DOI : 10. 3964 /j. issn. 1000-0593 (2014 )09-2439-05
matitic-granite. But in recent years , with increasing number
reports on magmatic zircon ages of 410~430 Ma-4]
more
and more researchers accepts that these rocks belong to Cale-donian . Since gensis controversial among local paragneiss , fo-
line of Guangdong and Guangxi provinces in SouthChina . For a long time , its genesis successively has been considered as metamorphic-complex , granitic- complex , migmatite or mig-
Received : 2013-10-11 ; accepted : 2014-01-20
liated ortho-granites and migmatit remains , its processes and mechanism of crystallization and intrusion are researched weakly . For differ previous names and arguments conven-
Foundation item : Major Prjects Grants of China Geological Survey (1212011085412 )and Grants of the National Natural Science Foundation of
China (41273040)
Biography : AN Yan-fei, (1982—), PhD of Anhui University
e-mail ; anyanfei0557@ 163 .com