中国原生金刚石的碳同位素组成及其来源

张宏福; 路凤香; 赵磊; M.A.Menzies; D.P.Mattey; 梁尚莹

中国原生金刚石的碳同位素组成及其来源

1.
中国科学院地质与地球物理研究所, 岩石圈演化国家重点实验室, 北京 100029
2.
Department of Geology, Royal Holloway University of London, Egham, Su rrey T W20 OEX, UK
3.
中国地质大学岩石矿物地球化学系, 北京 100083
4.
Department of Geology and Geography, Lehman College, City University of New York 10468, USA

基金项目:

国家自然科学基金重点项目 90714008

国家自然科学基金重点项目 40523003

国家自然科学基金重点项目 40721062

国家教委留学回国人员科研启动基金 49733110

详细信息

作者简介:
张宏福(1962-), 男, 研究员, 主要从事地幔地球化学和岩石圈演化研究.E-mail: hfzhang@mail.igcas.ac.cn

中图分类号: P597
计量
- 文章访问数: 3741
- HTML全文浏览量: 134
- PDF下载量: 34
- 被引次数: 0
出版历程
- 收稿日期: 2008-10-11
- 刊出日期: 2009-01-25

Carbon Isotopes in China Natural Diamonds

1.
S tate K ey Labor atory o f Lithosp her ic E vo lution, Institute o f Geolog y an d Geoph ysics, Chinese Academy o f S ciences, Beijin g 100029, China
2.
Department of Geology, Royal Holloway University of London, Egham, Su rrey T W20 OEX, UK
3.
Depar tmen t o f Petr olog y an d Miner alog y, Ch ina University o f Geosciences, Beij ing 100083, Ch ina
4.
Department of Geology and Geography, Lehman College, City University of New York 10468, USA

摘要

摘要: 中国两大主要的原生金刚石产地--山东蒙阴和辽宁复县产出有大量的高质量金刚石.通过对这些纯净金刚石碳同位素组成的激光消熔质谱分析, 发现这些地区单颗粒金刚石普遍存在碳同位素组成环带, 而且含固态矿物包裹体的金刚石比不含包裹体的金刚石的环带结构更为明显; 同时揭示了形成这些金刚石的碳来源于地幔深部, 即幔源碳, 而无来自地表的由重循环作用形成的壳源碳.
- 中国 /
- 原生金刚石 /
- 碳同位素 /
- 激光消熔质谱
Abstract: China' s two major natural diamond-producing mines-Shandong Mengyin and Liaoning Fuxian produce a large quantity of high-quality diamonds. EA-IRMS (Isotope Ratio Mass Spectrometry connected with Elemental Analyzer) analyses reveal that these single-crystal diamonds ubiquitously bear carbon isotope zonation. And in both localities, the carbon isotope zonation is more apparent in solid inclusion-bearing diamonds than in non-inclusion diamonds. Carbon isotope nature in Chinese diamonds also demonstrates that these diamonds-forming carbons were derived from mantle, with no equivocal evidence for the involvement of crust carbons derived from the recycling of the surface sediments.
- China /
- natural diamond /
- Carbon isotope /
- EA-IRMS

HTML全文

图 1 山东蒙阴和辽宁复县金伯利岩中原生金刚石的碳同位素组成(‰)

Fig. 1. Carbon isotopes (‰) in natural diamonds from Mengyin and Fuxian kimberlites

下载: 全尺寸图片幻灯片

图 2 中国华北原生金刚石及其寄主岩金伯利岩(据朱源和毛志海, 1991) 的碳同位素变化

同时与全球橄榄岩型和榴辉岩型金刚石和石墨(Deines, 1980;Swart et al., 1983;Dein es et al., 1984, 1987, 1991, 1993, 1997;Javoy et al ., 1984;Boyd et al ., 1987, 1992;Galimov, 1991;Pearson et al., 1994; Sch ulze et al., 1997) 、大洋玄武岩(OIB +M ORB) 中的石墨(Exley et a l., 1986;Pearson et al ., 1994) 、火成碳酸岩以及古代和现代海洋沉积物的碳同位素(Faure, 1977;San tos and C lay ton, 1995) 组成范围进行对比

Fig. 2. The range in carbon isotopes in Chinese natural diamonds and the host kimberlites from the North China

下载: 全尺寸图片幻灯片

表 1 中国原生金刚石的δ¹³C值(%o)

Table 1. δ¹³C values (%) in Chinese natural diamonds

参考文献(27)

[1]	Boy d, S.R., M a ttey, D.P., Pilling er, C.T., et al., 1987. Multiple g row th events during diamo nd g enesis: A n integ rated study of ca rbo n and nitr ogen isoto pes and nitr ogen agg reg atio n state in coated stones. Earth Planet. S ci. Lett., 86(2-4): 341-353. doi: 10.1016/0012-821X(87)90231-7
[2]	Boy d, S.R., Pillinger C.T., Milledge, H.J., et al., 1992. C and N iso topic composition and the infra red abso rption spectra of co ated diamo nds: Evidence for the regional unifo rmity o f CO₂-H₂O rich fluids in the litho spheric mantle. Earth P lanet S ci. Lett., 109(3 -4): 633-644. doi: 10.1016/0012-821X(92)90121-B
[3]	Chen, M.H., Lu, F.X., Zheng, J.P., 1999. Cathodoluminiscence features of diamond in F ux ian, Liaoning P rovince and thie r implications. Earth Science—J ournal of China Univ ersity of Geosciences, 24(2): 179-182 (in Chine se w ith Eng lish abstract).
[4]	Daniels L.R.M., Gur ney, J.J., Ha rte, B., 1996. A crustal miner al in a mantle diamond. Nature, 379: 153-156. doi: 10.1038/379153a0
[5]	Deine s, P., 1980. T he carbo n iso topic co mpo sition of diamonds: Rela tionship to diamo nd shape, co lo r, o ccur rence and v apo ur co mpo sitio n. Geochim. Cosmochim. Acta, 44(10): 943-961.
[6]	Deine s, P., Gur ney, J.J., Ha rris, J.W., 1984. A sso ciated chemical and carbon iso topic composition variatio ns in diamo nds fro m Finsch and Premie r kimberlite, So uth A frica. Geochim. Cosmochim. Acta, 48(2): 325-342. doi: 10.1016/0016-7037(84)90254-0
[7]	Deine s, P., H arr is, J.W., Gurney, J.J., 1987. Ca rbon iso topic composition, nitrog en content and inclusion com po sitio n of diamo nds fro m the Rober ts Victor kimbe rlite, South A frica: Evidence fo r ¹³C deple tion in the mantle. Geochim. Cosmochim. Acta, 51(5): 1227-1243. doi: 10.1016/0016-7037(87)90215-8
[8]	Deines P., Har ris, J.W., Gur ney, J.J., 1991. T he carbon isoto pic co mpo sitio n and nitr ogen content o f litho spheric and asthenosphe ric diamonds fro m the Jage rsfontein and Ko ffiefo ntein kimber lite, South A frica. Geochim. Cosmochim. Acta, 55(9): 2615-2625. doi: 10.1016/0016-7037(91)90377-H
[9]	Deines, P., Har ris, J.W., G urney, J.J., 1993. Depth-related ca rbon isoto pe and nitrog en concentr ation variability in the mantle below the O rapa kimber lite, Bo tswana, Af rica. Geochim. Cosmochim. Acta, 57(12): 2781-2796. doi: 10.1016/0016-7037(93)90390-I
[10]	Deines, P., Har ris, J.W., G urney, J.J., 1997. Carbon iso tope ratios, nitrog en co ntent and agg reg ate state, and inclusion chemistry o f diamond fr om Jwaneng, Botsw ana. Geochim. Cosmochim. Acta, 61(18): 3993-4005. doi: 10.1016/S0016-7037(97)00199-3
[11]	Ex ley, R.A., M a ttey, D.P., Clague D.A., et al., 1986. Carbo n iso tope sy stematics of a mantle " ho tspo t": A comparison o f L oihi Seamount and M O RB g la sses. Earth P lanet. S ci. Lett., 78(2-3): 189-199. doi: 10.1016/0012-821X(86)90060-9
[12]	Faure, G., 1977. P rinciples of isoto pe geo log y (Indeditio n). Jo hn Wiley & Sons, U.S.A., 589.
[13]	G alimo v, E.M., 1991. Iso to pe f ractio nation related to kimber lite mag matism a nd diamond forma tion. Geochim. Cosmochim. Acta, 55(6): 1697-1708. doi: 10.1016/0016-7037(91)90140-Z
[14]	Harris, J.W., Duncan D.J., Zhang F., et al., 1994. T he phy sical characteristics and syngenetic inclusio n geochemistry of diamo nds from Pipe 50, Liaoning Province, People' s Republic of China. In: M eyer, H.O.A., Leonardos O.H., eds., Proc 5th Int. Kimb. Conf. 1. Diamo nds: Characterisation, genesis and exploration, 106-115.
[15]	Javoy, M., Pineau F., Demaiffe D., 1984. Nitro gen and carbo n isotopic compositio n in the diamonds of M buji M ayi (Zäire). Earth Planet. Sci. Lett., 68(3): 399-412. doi: 10.1016/0012-821X(84)90125-0
[16]	Miao, Q., Liu, G.L., L u, Q., 1991. Discover ery of new complex inclusio ns in diamond a nd their g enesis. Geological Science and Technological Information, 10 (Suppl. ): 117-124 (in Chine se with Eng lish abstract).
[17]	Meyer, H.O.A., Z hang, A., M illedge, H.J., et al., 1994. Diamo nds and inclusions in diamo nds fro m Chinese kimbe rlites. In: M eye r, H.O.A., L eonardos, O.H., eds., P roc 5th Int. K imb. Conf. 1. Diamonds: Char ac te risation, g enesis and ex plo ration, 98-105.
[18]	Pearson D.G., Boyd, S.R., H agg er ty, S.E., e t al., 1994. The char acte rizatio n and o rigin of g r aphite in cra tonic litho spheric mantle: A pet rological ca rbo n isoto pe and Raman spectr oscopic study. Contrib. Mineral. Petrol., 115: 449-466. doi: 10.1007/BF00320978
[19]	Santos R.V., Clay ton, R.N., 1995. V ariatio ns of o xy gen and carbon isoto pes in car bo na tites. Geochim. Cosmochim. Acta, 59(7): 1339 -1352. doi: 10.1016/0016-7037(95)00048-5
[20]	Schulze, D.J., G alley, J.W., Vilijoen K.S., et al., 1997. Carbo n isoto pe co mpo sitio n of gr aphite in mantle eclogites. J. Geol., 105: 379 -386. doi: 10.1086/515933
[21]	Sw ar t, P.K., Pillinger, C.T., M illedge, H.J., et al., 1983. Carbo n iso topic variatio n within individual diamo nds. Nature, 303: 793-795.
[22]	Z heng, Y.F., 1999. M antle stable iso tope g eochemistry. In: Zheng Y.F., ed., Chemical geo dy namics. Science Press, Beijing, 62 -118 (in Chinese).
[23]	Zhu Y., M ao, Z.H., 1991. P reliminary investig ation geochemical pro per ty of kimbe rlite isotope in Shando ng. Geological Science and T echnological I n formation, 10(Supl. ): 77 -84 (in Chine se w ith Eng lish abstract).
[24]	陈美华, 路凤香, 郑建平, 1999. 辽宁复县金刚石的阴极发光光谱特征及其意义. 地球科学——中国地质大学学报, 24(2): 179-182. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX902.015.htm
[25]	苗青, 刘观亮, 陆琦, 等, 1991. 金刚石中复杂成分包裹体的新发现及其成因探讨. 地质科技情报, 10 (增刊): 117-124. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ1991S1016.htm
[26]	郑永飞. 1999. 地幔稳定同位素地球化学. 见: 郑永飞主编. 化学地球动力学. 北京: 科学出版社, 62 -118.
[27]	朱源, 毛志海, 1991. 山东金伯利岩同位素地球化学特征的初步研究. 地质科技情报, 10(增刊): 77 -84. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ1991S1011.htm