2015, Volume 17, Issue 2
Strategic Study of CAE >> 2015, Volume 17, Issue 2
Moving direction of magmatic conduit metallogenic system in Jinchuan Cu-Ni （PGE） sulfide deposit
China University of Geosciences (Beijing), Beijing 100083, China
Next Previous
Abstract
By the using of geochemical methods and quantitative textural analysis，This paper studied the spatial distribution characteristics of platinum group elements in Jinchuan Ni-Cu-（PGE） sulfide deposit，discussed the dynamic behavior in the process of magma evolution，and the evolution of Jinchuan mafic-ultramafic magma .This study found that the spatial distribution of the platinum group elements showing a certain regular changes between four continuous ore bodies. Overall，there are a significant decrease in the value of Pd/Ir-Ni/Cu between the four ore bodies from west to east. Through?the analysis，the cause which effected the distribution is that the monosulfide solid solution（MSS） has experienced a process of crystallization differentiation during crystal fractionation. On the other hand，through quantitative textural analysis，found that the structure of No. 1 ore body is much more mature than No. 1 ore body，which suggested that the emplacement of the former one is much more earlier than the latter one. Integrated geochemical and magma dynamics information，finally obtained the conclusion that the moving direction of Jinchuan magma conduit system is along the strike of the intrusions from northeast to southeast.
Keywords
Jinchuan ; Cu-Ni-（PGE） ; sulfide deposit ; magma conduit metallogenic system ; moving direction ; quantitative textural analysis
Figures
图1
图2
图3
图4
图5
图6
图7
图8
图9
图10
References
[ 1 ] 苏尚国，汤中立. 岩浆通道成矿系统的理论与实践[C]//第十届 全国矿床会议论文集，2010.
[ 2 ] 苏尚国，汤中立，罗照华，等. 岩浆通道成矿系统[J]. 岩石学报， 2014（11）：3120-3130. link1
[ 3 ] 闫海卿，王 强，胡彦强，等.金川铜镍硫化物岩浆矿床前锋岩 浆与岩浆通道[J]. 中国地质，2013（3）：807-819. link1
[ 4 ] 汤中立，李文渊. 金川铜镍硫化物（含铂）矿床成矿模式及地质 对比[M]. 北京：地质出版社，1995.
[ 5 ] Li X H，Su L，Chung S L，et al. Formation of the Jinchuan ultramafic intrusion and the world’s third largest Ni-Cu sulfide deposit：Associated with the ~825 Ma south China mantle plume [J]. Geochemistry，Geophysics，Geosystems，2005，6. doi：10.1029/ 2005GC 001006. link1
[ 6 ] Fleet M E，Stone W E，Crocket J H. Partitioning of palladium， iridium，and platinum between sulfide liquid and basalt melt：Effects of melt composition，concentration，and oxygen fugacity [J]. Geochimica et Cosmochimica Acta，1991，55（9）：2545-2554. link1
[ 7 ] Fleet M E，Crocket J H，Stone W E. Partitioning of platinumgroup elements（Os，Ir，Ru，Pt，Pd）and gold between sulfide liquid and basalt melt [J]. Geochimica et Cosmochimica Acta， 1996，60（13）：2397-2412. link1
[ 8 ] 甘肃省地质矿产局第六地质队. 白家咀子硫化铜镍矿床地质 [M]. 北京：地质出版社，1984.
[ 9 ] Sun S S，McDonough W F. Chemical and isotopic systematic of oceanic basalts：Implications for mantle compositions and processes [M]. In：Saunders A D and Norry MJ（eds.），1989. link1
[10] Chai G，NaldrettA J. Characteristics of Ni-Cu- PGEmineralization and genesis of the Jinchuan deposit，Northwest China [J]. Economic Geology，1992，87（6）：1475-1495. link1
[11] Su S，Li C. Controls on variations of platinum- group element concentrations in the sulfide ores of the Jinchuan Ni-Cu deposit， western China [J]. Miner Deposita，2008，43：609-622.
[12] Kullerud G. The Fe-Ni-S system [J]. Ann. Rep. Geophys. Lab， 1963，67：4055-4061. link1
[13] Randolph A D，Larson M A. Theory of Particulate Processes [M]. New York：Academic Press，1971.
[14] Cashman K V，Marsh B D. Crystal size distribution（CSD）in rocks and the kinetics and dynamics of crystallization II：Makaopuhi lava lake [J]. Contributions to Mineralogy and Petrology， 1988，99（3）：292-305. link1
[15] Marsh B D. Crystal size distribution（CSD）in rocks and the kinetics and dynamics of crystallization [J]. Contributions to Mineralogy and Petrology，1988，99（3）：277-291. link1
[16] 杨宗锋，罗照华，卢欣祥. 定量化火成岩结构分析与岩浆固结 的动力学过程[J]. 地学前缘，2010（1）：246-266. link1
[17] Marsh B D. On the interpretation of crystal size distributions in magmatic systems [J]. Journal of Petrology，1998，39（4）：553- 599. link1
[18] Boorma S，Boudreau A，Kruger F J. The lower zone- critical zone transition of the Bushveld complex：A quantitative textural study [J]. Journal of Petrology，2004，45（6）：1209-1235. link1
[19] Jerram D A，Cheadle M J，Hunter R H. The spatial distribution of grains and crystals in rocks [J]. Contributions to Mineralogy and Petrology，1996，125（1）：60-74. link1
[20] Jerram D A，Cheadle M J，Philpotts A R. Quantifying the building blocks of igneous rocks：Are clustered crystal frameworks the foundation [J]. Journal of Petrology，2003，44（11）：2033- 2051. link1
[21] 杨宗锋. 火成岩系统广义定量化结构分析及其意义[D]. 北京： 中国地质大学，2013. link1
[22] Higgins M D. Quantitative Textural Measurements in Igneous and Metamorphic Petrology [M]. Cambridge：Cambridge University Press，2006.
[23] 王河锦. 确定岩石中矿物成核速度、成核密度、体生长速度和 结晶时间的CSD理论[J]. 岩石矿物学杂志，1990，9（4）：331- 340. link1
[24] Voorhees P W. Ostwald ripening of 22 phase mixtures [J]. Annual Review of Materials Science，1992，22：197-215. link1
[25] 罗照华，卢欣祥，陈必河，等，透岩浆流体成矿作用导论[M]. 北 京：地质出版社，2009.
[26] 罗照华. 流体-熔体强相互作用的成矿功能[C]// 第五届全国成 矿理论与找矿方法学术讨论会论文集，2011.
[27] 罗照华，卢欣祥. 成矿系统的核心：流体的行为[C]// 中国矿物 岩石地球化学学会第13届学术年会论文集，2011. link1
[28] 罗照华，杨宗锋，代 耕，等. 火成岩的晶体群与成因矿物学展 望[J]. 中国地质，2013（1）：176-181. link1
[29] 罗照华. 超临界流体晶：成因和意义[C]// 中国地球物理2013 第四分会场论文集，2013. link1
京公网安备 11010502051620号
