河北迁安杏山铁矿床地球化学特征及其对成矿物质来源的指示

丁文君; 陈正乐; 陈柏林; 董法先; 崔玲玲

河北迁安杏山铁矿床地球化学特征及其对成矿物质来源的指示

1.
中国地质大学（北京）地球科学与资源学院，北京 100083
2.
中国地质科学院地质力学研宄所，北京 100081

基金项目:

全国危机矿山接替资源找矿项目 200799094

全国危机矿山接替资源找矿项目 20089950

详细信息

作者简介:
丁文君（1984-)，女，在读硕士，主要从事矿床地球化学研究。E-mail: dingdngwj@yeah.net

中图分类号: P618.31
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- 被引次数: 0
出版历程
- 收稿日期: 2009-09-23
- 刊出日期: 2009-12-01

GEOCHEMICAL CHARACTERS OF BAND IRON FORMATIONS FROM XINGSHAN IRON DEPOSIT IN QIAN'AN AREA, HEBEI PROVINCE: IMPLICATION FOR THEIR ORIGIN

1.
School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China
2.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

摘要

摘要: 不同学者曾对迁安地区铁矿床的前寒武地质、岩石学和地球化学等方面进行了深入的研究，但是其成矿物质来源至今没有进行深入探讨。危机矿山勘察在迁安杏山矿床中发现了富大铁矿体，但其成因不明。本文通过对迁安富矿和普通矿石的主量、微量元素和稀土元素研究，结果表明它们的化学成分主要由Fe₂O₃(T)、SiO₂组成，并且Al₂O₃和TiO₂具有较低的含量，指示其形成时几乎没有碎屑物质的加入。而经PAAS标准化后，稀土元素的配分模式表现轻稀土亏损、重稀土富集的特征，无论是富矿还是普通矿石，都具有Eu正异常、其Co/Zn和Ni/Zn比值与热液类似的特征，表明形成时有高温热液加入；其Y/Ho > 44、Y的正异常表明其有海水的成因；La/La^*表明其没有陆源碎屑加入；La_N/YV_N < 1，表明既有海水特征，又有热液特征，所有这些数据都显示了迁安铁矿矿石的物质来源为海水和热液，与其他地方BIF铁矿物质来源一致。由于富矿和普通矿石的物质来源一致、主微量及稀土元素含量和分布类似、铁矿物主要为磁铁矿、原始沉积条带明显，推断富矿可能是火山一沉积建造原始沉积时由于局部富铁环境而形成的。
- 条带状铁建造 /
- 迁安 /
- 地球化学
Abstract: The origin of Qian'an BIFs remains unclear, although plenty of efforts have been done in this area (especially on the Precambrian geology, petrology and geochemistry). In the early stage of "Exploring Mines Facing A Resourse Crisis" project, large and high-grade iron ores were discovered. The ma\or and trace element analyses reported in this paper provide new insights on the origin and formation environment of Qian'an BIFs. The average bulk compositions of the BIFs are rich in total Fe and Sio₂, and very low in Al₂o₃ and Tio₂ contents, indicating that a minor terrigenous component input. Their PASS-normalized REE patterns show strongly enriched HREE and positive anomalies of La, Eu and Y. All of the geochemistry fingerprints, in combination with Co/Zn, Ni/Zn, Y/Ho (> 44), La/La^* and La_N/Yb_N (< 1) ratios, strongly suggest a combined origin of hydrothermal water and marine for Qian'an BIFs > consistent with BIFs otherwhere. There are no distinct differences between High-Grade and normal ores, which have apparently similar original sedimentary belts, in ma\or and trace element content, PASS-normalized REE pattern and Fe-bearing mineral assemblage (mainly magnetite), demonstrating that they might have the same origin. It is suggested that the high-grade ores were probably formed at locally Fe-rich environment during volcanic-sedimentary activity.
- band iron formations (BIFs) /
- Qian'an /
- geochemistry

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图 1 迁安地区地质简图及其大地构造位置图

1.第四系；2.古近系新集组；3.上侏罗统；4.中元古界；5.中太古界三屯营组；6.磁铁石英岩；7.断层

Figure 1. Simplified geological map of Qian'an area and its geological setting

下载: 全尺寸图片幻灯片

图 2 杏山矿床BIF型铁矿石REE + Y分布图^[16]，图A为富矿，图B为普通矿石

Figure 2. PASS-noimalized REE + Y diagram of BIF from Qian'an area

下载: 全尺寸图片幻灯片

表 1 杏山矿床富矿及普通矿石主量元素分析数据(wt.%)

Table 1. Major element contents of BIF bulk samples from Xingshan deposit, Qian'an area(wt.%)

表 2 杏山矿床BIF型富矿全岩样品微量元素及稀土元素的分析结果

Table 2. Trace and rare earth element contents of Fe-iich BIFs from Xingshan deposit, Qian'an area

表 3 迁安矿床BIF型普通矿石全岩样品微量元素和稀土元素的分析结果

Table 3. Trace and rare earth element contents of BIFs from Qian'an deposit, Qian'an area

参考文献(29)

[1]	Holland H. A Possible Source of Iron in Iron-Formations: Economic Geology[J]. The Oceans, 1973, 68: 1169~1172. http://www.mendeley.com/research/oceans-possible-source-iron-ironformations/
[2]	Jacobsen S, Pimentel M. A Nd isotopic study of the Hamersley and Michipicoten banded iron formations-The source of REE and Fe in Archean oceans[J]. Earth and Planetary Science Letters, 1988, 87: 29~44. doi: 10.1016/0012-821X(88)90062-3
[3]	Gnaaneshwar R, Naqvi S. Geochemistry, depositional environment and tectonic setting of the BIF's of the Late Archaean Chitradurga Schist Belt, India[J]. Chemical Geology, 1995, 121: 217-243. doi: 10.1016/0009-2541(94)00116-P
[4]	Khan R, Sharma S, Patil D, et al. Trace, rare-earth element, and oxygen isotopic systematics for the genesis of banded ironformations: Evidence from Kushtagi schist belt, Archaean Dharwar Craton, India[J]. Geochimica et Cosmochimica Acta, 1996, 60: 3285-3294. doi: 10.1016/0016-7037(96)00172-X
[5]	从柏林, 李继亮, 张儒瑗.冀东迁西一迁安地区早太古代变质岩系原岩恢复及其地质意义[J].地质科学, 1982, 4(2): 125-131. http://www.dzkx.org/CN/abstract/abstract10673.shtml CONG Bo-lin LI JI-liang, ZHANG Ru-yuan. On the prototith reconstruction and geological implications of early Archaean metamorphic rocks in eastern Hebei[J]. Scientia Geologica Sinica, 1982, 4 (2): 125-131. http://www.dzkx.org/CN/abstract/abstract10673.shtml
[6]	舒航.迁西群岩石地球化学特性及地质意义[J].地质地球化学, 1989, 3: 66-69. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=dzdq198903014&dbname=CJFD&dbcode=CJFQ SHU Hang. Characters of geochemistry of Qianxi group and its implications[J]. Geology-Geochemistry, 1989, 3: 66~69. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=dzdq198903014&dbname=CJFD&dbcode=CJFQ
[7]	李凤月, 宋复梅.冀东迁安西群含铁变质岩系中的辉石及其与铁矿[J].岩石矿物学杂志, 1992, 1: 83~91. http://www.yskw.ac.cn/ch/reader/view_abstract.aspx?file_no=19920116&flag=1 LI Feng-yue, SONG Fu-mei. Pyroxene from ferriferous metamorphic rocks in Qianxi Group, Qian'an County, East Hebei, and its genetic relationship with iron ore[J]. Acta Petrologica et Mineralogica, 1992, 1: 83~91. http://www.yskw.ac.cn/ch/reader/view_abstract.aspx?file_no=19920116&flag=1
[8]	王凯怡, J. Sills, B. F. Windley.冀东迁安地区太古代片麻杂岩的地球化学和演化[J].地质科学, 1990, 4: 344~358. http://www.dzkx.org/CN/abstract/abstract10271.shtml WANG Kai-yi, Sills J, Windley B F. Geochemistry and evolution of archean gneiss complexes in Qian'an area, East Hebei[J]. Chinese Journal of Geology, 1990, 4: 344~358. http://www.dzkx.org/CN/abstract/abstract10271.shtml
[9]	李凤月.迁安矿区太古代地质有关几问题的探讨[J].首钢地质, 1992, 9: 11~24. https://www.ixueshu.com/document/fdff591c93531899318947a18e7f9386.html LI Feng-yue. Discussion of several Archean geological problems of Qian'an area[J]. Shougang Geology, 1992, 9:11~24. https://www.ixueshu.com/document/fdff591c93531899318947a18e7f9386.html
[10]	刘武旭, 杨振升.冀东迁西三屯营地区早太古宙三组片麻岩的岩石地球化学及其成因[J].地质论评, 1993, 39(3): 205~215. http://www.geojournals.cn/georev/ch/reader/view_abstract.aspx?file_no=19930341&flag=1 LIU Wu-xu, YANG Zhen-sheng. Three early Archaean gneisses around Santunying of Qianxi, Eastern Hebei, China: Geochemistry and petrogenesis[J]. Geological Review, 1993, 39 (3): 205~215. http://www.geojournals.cn/georev/ch/reader/view_abstract.aspx?file_no=19930341&flag=1
[11]	Zhao G, Wilde S, Cawood P, et al. Archean blocks and their boundaries in the North China Craton: Lithological, geochemical, structural and P-T path constraints and tectonic evolution[J]. Precambrian Research, 2001, 107: 45 ~73. doi: 10.1016/S0301-9268(00)00154-6
[12]	李志忠, 顾德林, 李龙, 等.冀东迁安矿区及其邻区早前寒武纪地史发展的主要阶段[J].地球科学--中国地质大学学报, 1989, 14(增刊): 43~52. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=dqkx1989s1009&dbname=CJFD&dbcode=CJFQ LI Zhi-zhong, GU De-lin, LI Long, et al. The primary stage of geological historical evolution of the Qian'an ore field and neighbour region in eastern Hebei Province[J]. Earth Science-Journal of China University of Geosciences, 1989, 14(Sup): 43~52. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=dqkx1989s1009&dbname=CJFD&dbcode=CJFQ
[13]	毕建成.冀东迁安水厂一杏山地区早前寒武纪变质作用及实验地质研究[J].吉林地质, 1989, 9 (3): 55~67. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=jldz198903007&dbname=CJFD&dbcode=CJFQ BI Jian-cheng. The study of the early pre-Cambrian metamorphism and experimental geology in the Shuichang-Xingshan area, Qian'an Eastern Hebei[J]. Jilin Geology, 1989, 9(3):55~67. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=jldz198903007&dbname=CJFD&dbcode=CJFQ
[14]	Dymek R, Klein C. Chemistry, petrology and origin of banded iron-formation lithologies from the 3800 Ma Isua supracrustal belt, West Greenland[J]. Precambrian Research, 1988, 39: 247~302. doi: 10.1016/0301-9268(88)90022-8
[15]	Raju P. Petrography and geochemical behaviour of trace element, REE and precious metal signatures of sulphidic banded iron formations from the Chikkasiddavanahalli area, Chitradurga schist belt, India[J]. Journal of Asian Earth Sciences, 2009, 34: 663~673. doi: 10.1016/j.jseaes.2008.10.005
[16]	Sugitani K. Geochemical characteristic of Archean cherts and other sedimentary rocks in the Pilbara Block, Western Australia: Evidence for the Archean sea-water enrichedin hydrothermally-derived iron and silica[J]. Precambrian Research, 1992, 57: 21~47. doi: 10.1016/0301-9268(92)90093-4
[17]	McLennan S. Rare earth elements in sedimentary rocks; influence of provenance and sedimentary processes[J]. Reviews in Mineralogy and Geochemistry, 1989, 21: 169~ 200. http://doc.sciencenet.cn/DocInfo.aspx?id=4792
[18]	Campbell A, Palmer M, Klinkhammer G, et al. Chemistry of hot springs on the Mid-Atlantic Ridge, 1988.
[19]	Bau M, Mller P, Dulski P. Yttrium and lanthanides in eastern Mediterranean seawater and their fractionation during redox-cycling[J]. Marine Chemistry, 1997, 56: 123~131. doi: 10.1016/S0304-4203(96)00091-6
[20]	Alibo D, Nozaki Y. Rare earth elements in seawater: Particle association, shale-normalization, and Ce oxidation[J]. Geochimica etCosmochimica Acta, 1999, 63: 363~372. doi: 10.1016/S0016-7037(98)00279-8
[21]	Bau M, Dulski P. Comparing yttrium and rare earths in hydrothermal fluids from the Mid-Atlantic Ridge: implications for Y and REE behaviour during near-vent mixing and for the Y/Ho ratio of Proterozoic seawater[J]. Chemical Geology, 1999, 155: 77~90. doi: 10.1016/S0009-2541(98)00142-9
[22]	Kato Y, Kawakami T, Kano T, et al. Rare-earth element geochemistry of banded iron formations and associated amphibolite from the Sargur belts, south India[J]. Journal of Southeast Asian Earth Sciences, 1996, 14: 161~164. doi: 10.1016/S0743-9547(96)00054-2
[23]	Danielson A, Mller P, Dulski P. The europium anomalies in banded iron formations and the thermal history of the oceanic crust[J]. Chemical Geology, 1992, 97: 89~100. doi: 10.1016/0009-2541(92)90137-T
[24]	Nozaki Y, Zhang J, Amakawa H. The fractionation between Y and Ho in the marine environment[J]. Earth and Planetary Science Letters, 1997, 148: 329-340. doi: 10.1016/S0012-821X(97)00034-4
[25]	李志红, 朱祥坤, 唐索寒.鞍山--本溪地区条带状铁建造的铁同位素与稀土元素特征及其对成矿物质来源的指示[J].岩石矿物学杂志, 2008, 7(4): 285-290. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=yskw200804004&dbname=CJFD&dbcode=CJFQ 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, 2008, 7(4): 285-290. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=yskw200804004&dbname=CJFD&dbcode=CJFQ
[26]	Franco P, Leon B. A review of Australia's Proterozoic mineral systems and genetic models[J]. Precambrian Research, 2008, 166: 54-80. doi: 10.1016/j.precamres.2007.05.008
[27]	赵斌, 李统锦.鞍山弓长岭富磁铁矿床的形成机制和物理化学条件研究[J].地球化学, 1980, 4: 333-344. doi: 10.3321/j.issn:0379-1726.1980.04.002 Zhao Bin, Li Tong-jin. A preliminary study on the mechanism and physicochemical conditions of formation of Gongchangling rich iron deposit[J]. Geochimica, 1980, 4: 333-344. doi: 10.3321/j.issn:0379-1726.1980.04.002
[28]	鞠振南, 卫广远, 刘凤英.辽阳弓长岭富铁矿的成因探讨[J].黑龙江科技信息, 2009, 16: 53-54. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hlkx200916052&dbname=CJFD&dbcode=CJFQ JU Zhen-nan, WEI Guang-yuan, LIU Feng-ying. The study on the cause of the Gongchangling high-grad iron deposit of Liaoyang[J]. Heilongjiang Science and Technology Information, 2009, 16: 53-54. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hlkx200916052&dbname=CJFD&dbcode=CJFQ
[29]	关广岳.风化淋滤型富铁矿床的地球化学[J].地质与勘探, 1976, 8:4-24. http://www.dzykt.com/dzyktcn/ch/reader/view_abstract.aspx?file_no=197608168&flag=1 GUAN Guang-yue. Geochemistry of weathered type of High-Grade ore deposit[J]. Geology and Prospecting, 1976, 8: 4-24. http://www.dzykt.com/dzyktcn/ch/reader/view_abstract.aspx?file_no=197608168&flag=1