庐枞北部火山-次火山成矿作用过程REE分异特征.PDFVIP

第26 卷第6 期 合肥 工业 大学 学报( 自然科学版) Vol.26 No.6 2003 年12 月 JOURNAL OF HEFEI UNIVERSIT OF T ECHNOLOG Dec.2003 -REE 查世新 ( 327 , 230011) : -, - 3 : ; , , , Eu / , : -; ; ; : P611.13; P595: A: 1003-5060( 2003) 06-1222-05 Dif ferential characteristics of REE i n the process of - vol canic subvolcanic metall ogenesis in the northern Luj iang-Zongyang basi n, Anhui Province ZHA Shi-xin ( No. 327 Geological T eam, Bureau of Geology and M ineral Resources of Anhui Province, Hefei 230011, China) Abstract: Based on the geochemical study of the rare earth element ( REE) of four deposits in the northern area of Lujiang-Zongyang basin of Anhui Province, the differential characteristics of REE in the process of volcanic-subvolcanic metallogenesis are analyzed, the chondrite-normalized REE pat- , terns of main ore minerals in the deposits are classified as threetypes the smooth type thejump type and the inclination type. Directional evolution features of REE differentiation of main minerals from the Longqiao deposit are also analyzed,and it is found out that from the earlier metallogenetic stage to the later stage the overall trend is in the direction that the Eu negative anomaly enhances and the, - - Ce ratio reduces and chondrite normalized REE patterns change from inclination to smooth- ing with the lowering of ore-forming temperature. Key words :volcanic-subvolcanic metallogenesis; rare earth element (REE) ; differentiation; northern - Lujiang Zongyang basin -() 7 - ,-, ( ) [ 1, 2] -, ,, : 2002-09-13; : 2003-08-15 : ( 1956- ) , , , . 第6 期　　　　　　　查世新: 庐枞北部火山-次火山成矿作用