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1 Vol.30 No.6 : Acta Geoscientica Sinica Dec. 2009: www. 地球学报.com,,, 摘要 :,,,, TFe-(CaO+MgO)-SiO2,,, PAAS( ), Eu Y, Ce, BIF Ti V Co Ni Mn Sr Ba, U Ta La Ce P, K Nb Sr Hf Zr Sr/Ba Ti/V, 关键词 : ; ; ; ; 中图分类号 : P618.7;P595 文献标志码 : A 文章编号 : (2009) Characteristics of Rare Earth Elements and Trace Elements in Hanwang Neo-Archaean Banded Iron Formations, Shandong Province SHEN Qi-han, SONG Hui-xia, ZHAO Zi-ran Institute of Geology, Chinese Academy of Geological Sciences, Beijing Abstract: Hanwang banded iron formations (BIF) in Shandong Province constitute a large iron deposit of Anshan type formed in Neo-Archaean. In this paper, petrology and petrochemistry of Hanwang BIF were studied and a comparison was made with other BIF in the world. Petrological studies show that the BIF suffered greenschist facies to low amphibolite facies metamorphism and part of the magnetite was recrystallized whereas the other part of the magnetite preserved the characteristics of chemical sediments. In the diagram of TFe-(CaO+MgO)-SiO 2, Hanwang BIF has a consistent distribution area with Wutaishan BIF and other BIF in the world. The REE contents of Hanwang BIF are low, showing characteristics of marine sediments in Archean. In the PAAS-normalized REE pattern, LREE are depleted and HREE are enriched relatively, with strong Eu positive anomaly, obvious Y positive anomaly and no visible Ce anomaly. These Hanwang BIF characteristics are itentical with characteristics of Gongchangling, Wutaishan and many other Archean BIF in the world. As for trace elements, contents of Ti, V, Co, Ni, Mn, Sr and Ba are low. In trace elements distribution diagram normalized by primary mantle, U, Ta, La, Ce and P have positive anomalies, whereas things are just the opposite for K, Nb, Sr, Hf and Zr. The ratios of Sr/Ba, Ti/V and some other elements are also considered in this paper. A comprehensive study of Hanwang BIF shows that its ferruginous material was associated with volcanic hydrothermal solution and was formed in a marine chemical sedimentary environment. Key words: Hanwang; Archean; banded iron formations (BIF); petrochemistry; chemical sediments ( : ) : ; : :,, 1922, huixiasong@cags.net.cn

694,, (Danielson A et al, 1992;, 1998),, 1 矿床地质简介,,,, 11 km, 4 km, 40 km 2 -,,, 31-65, 50, ( 1)(,, 2006) ( ), 34.62%, 29.58%, 55 m,,,,,,,,,,, 2.75-2.7 Ga( ), 2500 Ma,, : 35 57 43.4, 118 26 41.

2 694,, (Danielson A et al, 1992;, 1998),, 1 矿床地质简介,,,, 11 km, 4 km, 40 km 2 -,,, 31-65, 50, ( 1)(,, 2006) ( ), 34.62%, 29.58%, 55 m,,,,,,,,,,, Ga( ), 2500 Ma,, : , 韩旺条带状铁矿的岩石学特征 2.1,,, mm, 2-3 mm,,, 2-3 mm,,,,,,,,,,,,,,, 2-3 mm,,,,, 1-25 m,,,, ( ),,,,,,, 图 1 山东韩旺铁矿区地质简图 ( 据孔庆友等, 2006) Fig. 1 Simplified geological map of the Hanwang iron ore deposit in Shandong Province (after Kong Qingyou et al., 2006)

3 : 695,,,, Np=, Nm=, Ng=, Ng c= 15-20,,, TFe 5%, 5%, 4,,,, 2.2 1, (TFe 2 O 3 ) 55.69% 63.68%, 58.42% SiO % 43.44%, 40.26%, SiO 2 MnO, 0.075% 0.083%, MnO, MgO 1.39% 1.75%, 1.61%, MgO, CaO 1.69% 2.03%, 1.88%, CaO, CaO K 2 O <0.01% 0.03%, 0.018%,,, K 2 O 0.58% Na 2 O 0.05% 0.08%, 0.066% TiO 2 <0.01% 0.04%, 0.018% Al 2 O % 0.58%, 0.41%, P 2 O % 0.09%, 0.056%, P 2 O 5, 1, SiO 2 TFe 2 O 3, 97.99% 99.13%, (TiO 2, Al 2 O 3, MnO, CaO, MgO, K 2 O, Na 2 O, P 2 O 5 ),,, SiO 2 /Al 2 O 3 10, SiO 2 /Al 2 O 3 10, 1, SiO 2 /Al 2 O , 98, SiO 2 /Al 2 O 3, SiO 2 /Al 2 O , SiO 2 /Al 2 O ,, 10,, 2, TFe-(CaO+MgO)-SiO 2 (, 1986;, 1989), 表 1 韩旺条带状铁矿的主量元素含量 (%) Table 1 Content of major elements in Hanwang iron ore(%) SiO 2 TiO 2 Al 2 O 3 TFe 2 O 3 Fe 2 O 3 FeO MnO CaO MgO K 2 O Na 2 O P 2 O 5 LOI TFe HW < HW < HW < HW < (9) (4) (8) (5) : 1, ; 2-5 (1994), 6 (1994), Gross(1980);

4 696 图 2 TFe-(CaO+MgO)-SiO 2 图解 Fig. 2 TFe-(CaO+MgO)-SiO 2 diagram 3 稀土和微量元素特征 , 2 La La/La*=La PAAS /(3Pr PAAS -2Nd PAAS ), Ce Ce/Ce*=Ce PAAS /(2Pr PAAS -Nd PAAS ), Y Y/Y*=2Y PAAS /(Dy PAAS +Ho PAAS ) (Robert et al, 2004), PAAS, McLennan(1989), PAAS REE 3 2 3,, ( ) 10 6, ,,, 3, PAAS,, 表 2 山东韩旺及其它地区条带状铁矿中稀土元素含量 ( 10 6 ) Table 2 REE contents of BIF in the Hanwang iron ore deposit and other areas ( 10 6 ) HW01-2 HW01-3 HW01-4 HW01-5 (4 (3) ) La Ce Pr Nd Sm Eu Gd Tb <0.250 Dy Ho Er Tm Yb Lu Y REE LREE/HREE La/Yb Y/Ho Sm/Nd Pr/Yb Eu/Sm Y/Y* La/La* Ce/Ce* Eu/Eu* : 1 4, (X-Series) ; 2 (2008) (Gc062-17, Gc DM06-6) ; 3 (2002)4 (97404B, 97404C, 96W ),,

5 : 697 表 3 山东韩旺及其它地区条带状铁矿中微量元素含量 ( 10 6 ) Table 3 Trace elements contents of BIF in the Hanwang iron ore deposit and other areas ( 10 6 ) HW01-2 HW01-3 HW01-4 HW01-5 ( ) Sc ( ) Ti Rb Sr Ba Cr Co Ni V Cu Zn Pb Zr Hf Ga Ge Nb Ta Th U Sr/Ba Sr/Rb Ba/Rb Co/Zn < Ni/Zn Ti/V Ni/Co Cr/Ni Ga/Ge Nb/Ta Th/U : 1 4, (X-Series) ; 2 (1994), ; 3 2 ; 4 (2002) 1 图 3 山东韩旺条带状铁矿与鞍山弓长岭和五台山铁矿的稀土配分曲线比较 Fig. 3 PAAS-normalized REE patterns of Hanwang, Gongchangling and Wutaishan BIF, Pr/Yb= ; Ce, Ce/Ce*= ; Eu, Eu/Eu*= ; Y, Y/Y*= , Y/Ho , BIF (, 1987; Robert B et al, 2004; Carlos A et al, 2007), Eu/Sm, , 3.2 4, 4, 3 4 U Ta La

6 698 图 4 Fig. 4 山东韩旺条带状铁矿的微量元素配分曲线 Primitive mantle-normalized trace elements patterns of Hanwang BIF Ce P, K Nb Sr Hf Zr, Ti V Co Ni Mn Sr Ba Sr/Ba 1, Sr/Ba 1, Sr/Ba , 1.59, Sr/Ba Sr/Ba 1, Sr/Ba 1,, Ti/V, H A Plaksanko,, Ti V , 13-85, Ti/V , 14.39,, Ti/V,, Ti/V 18.98, Ti/V 11.02, Cr Ni Co, Ni/Co, Ga Ge 10 6, 10 6,,, 4 几点结论 (1), (2700Ma),,,, (2), ( ) 10 6, , PAAS,, Eu Y, Ce, BIF Eu/Sm , , (3) Ti V Co Ni Mn Sr Ba, U Ta La Ce P, K Nb Sr Hf Zr Sr/Ba Ti/V Ni / Co 参考文献 :,,,,, [M]. : [M]. :, ,, [J]., 27(4): ,,,,, [M]. :.,, [M]. :.,,,,,,, [M]. : [A]., :, 1-30., Windley B F, Sills J D,, (BIF)[J]., 1989(3): References: Carlos A S, Sonia M B, Alcides N S, Francisco J R Geochemistry and genesis of the banded iron formation of the Caue formation, Quadrilatero Ferrifero, Minas Gerais, Brail [J]. Precambrain Research, 152: Danielson A, Moller P and Dulski P The europium anomalies in banded iron formations and the thermal history of the oceanic crust [J]. Chemical Geology, 97, KONG Qing-you, ZHANG Tian-zhen, YU Xue-feng, XU Jun-xiang, PAN Yuan-lin, LI Xian-shui Deposits in Shandong Province [J]. Ji nan: Shandong Science and Technology Pub-

7 : 699 lishing House(in Chinese with English abstract). LI Shu-xun, JI Shu-kai, MA Zhi-hong, HE Gao-pin, TIAN Yong-qing, YANG Wen-kui Geology of metamorphic sedimentary iron deposit in Wutaishan area [M]. Jilin: Jilin Science and Technology Publishing House(in Chinese with English abstract). LI Wen-da Rare-earth element application in deposit researching [M]. Beijing: Geological Publishing House, (in Chinese with English abstract). LI Zhi-hong, ZHU Xiang-kun, TANG Suo-han Characters of Fe isotopes and rare earth elements of banded iron formations from Anshan-Benxi area: implications for Fe source [J]. Acta Petrologica et Mineralogica, 27(4): (in Chinese with English abstract). LUO Hui, CHEN Zhi-hong, SHEN Bao-feng Ore-bearing geology and metallogenic prognosis of BIF, Wutaishan area [J]. Beijing: Geological Publishing House(in Chinese with English abstract). McLennan S M Rare earth elements in sedimentary rocks: influence of provenance and sedimentary processes [A]. In: Lipin B R and McKay G A (eds), Geochemistry and mineralogy of rare earth elements. Reviews in Mineralogy, 21: Robert B, Balz S K, Stephen M, Christopher M F and Martin J W Characterisation of early Archaean chemical sediments by trace element signatures [J]. Earth and Planetary Science Letters, 222: SHEN Bao-feng, LUO Hui, LI Shuang-bao, LI Jun-jian, PENG Xiao-liang, HU Xiao-die, MAO De-bao, LIANG Ruo-xin Geology and metallization of Archean greenstone belts in north China platform [J]. Beijing: Geological Publishing House(in Chinese with English abstract). SHEN Qi-han Geological characteristics and settings of the Pre-Cambrain banded magnetite quartzite in north China platform [A]. In CHENG Yu-qi ed Collected papers on Pre-Cambrain geology study of north China platform. Beijing: Geological Publishing House, 1-30(in Chinese with English abstract). ZHAI Ming-guo, Windley B F, Sills J D, YANG Rui-ying, HAN Song REE and trace element geochemistry of the Ar- chean Anshan-Benxi BIF, Liaoning, northeast China [J]. Geochimica, 1989 (3): (in Chinese with English abstract).

GeologicalScienceandTechnologyInformation Vol.37 No.2 Mar doi: /j.cnki.dzkq ,,,. [J].,2018,37(2):71-78.,,,, (, 62100

37 2 2018 3 GeologicalScienceandTechnologyInformation Vol.37 No.2 Mar. 2018 doi:10.19509/j.cnki.dzkq.2018.0210. [J]. 201837(2):71-78. ( 621000) : (CIA) (ICV) - : ; ; ; ; :P534.51 :A :1000-7849(2018)02-0071-08