Mineralogical chemical characteristics of chromite from diabase in Panjiagou area of the eastern fourth diamond metallogenic belt and its significance in Liaoning Province
Abstract：Yongning area has been classified as the fourth diamond metallogenic belt in Liaoning Province due to the discovery of primary diamond. However, the diamond source has not yet been determined so far, and it is necessary to reinforce the study of the indicator minerals associated with the diamond. The compositions of chromite selected from the diabase in Panjiagou area in the eastern Yongning area were analyzed by electron microprobe, and they are compared with the chromite from typical kimberlite pipes in Liaoning Province to explore chromite genesis and the relationship with diamonds. According to the particle sizes, morphology, and melting erosion characteristics in the back-scattered electron images of chromite samples and the composition feature of high Cr, rich Mg, low Al and poor Ti through electron probe micro analysis, the authors speculated that the chromite come from mantle xenocryst, belonging to chromite subclass, which is mainly mafic-chromium-aluminium- ferrum subspecies and mafic-chromium-aluminium subspecies. The calculated formation temperatures of the chromite are 1 252~1 307 ℃, which is consistent with the reported formation temperatures of the chromite in Wafangdian kimberlite, and is also closed to the formation temperature of diamonds. It indicates an affinity relationship between chromites and diamonds, and great potential for diamond prospecting in the diabases of Panjiagou area. This study is significant for the exploration of primary diamond deposits and the identification of the diamond sources in Panjiagou area.
杨献忠, 周延, 肖凡, 徐华, 劳金秀, 向华. 辽宁第IV金刚石成矿带东部潘家沟辉绿岩中铬铁矿的矿物化学特征及其意义[J]. 中国地质调查, 2024, 11(3): 32-41.
YANG Xianzhong, ZHOU Yan, XIAO Fan, XU hua, LAO Jinxiu, XIANG Hua. Mineralogical chemical characteristics of chromite from diabase in Panjiagou area of the eastern fourth diamond metallogenic belt and its significance in Liaoning Province. , 2024, 11(3): 32-41.
[1] 付海涛. 三维建模技术在金刚石勘查中的应用——以辽宁省瓦房店地区为例[J].地质通报,2019,38(1):51-55. Fu H T.The application of 3D modeling technology to the kimberlite rock tube exploration:A case study of Wafangdian in Liaoning Province[J].Geological Bulletin of China,2019,38(1):51-55. [2] 刘礼广,吴大天,韩双,等.金伯利岩型金刚石矿床研究及其成矿模式探讨——以辽宁瓦房店地区金刚石原生矿矿床为例[J].地质学报,2020,94(9):2650-2665. Liu L G,Wu D T,Han S,et al.Study of kimberlite type diamond deposit and its metallogenic model:An example of the primary diamond deposit in the Wafangdian area of Liaoning Province[J].Acta Geologica Sinica,2020,94(9):2650-2665. [3] 杨献忠,王爱国,周延,等.辽宁永宁地区含金刚石闪长质岩石显微特征及金刚石来源探讨[J].地质找矿论丛,2023,38(2):185-196. Yang X Z,Wang A G,Zhou Y,et al.Microscopic characteristics of diamond-bearing dioritic rock in Yongning area,Liaoning province and discussion on source of the diamond[J].Contributions to Geology and Mineral Resources Research,2023,38(2):185-196. [4] 曹中夫,曹桂凤.辽宁瓦房店新发现一条金刚石成矿带[N].中国国土资源报,2017-04-18. Cao Z F,Cao G F.A new diamond metallgenic belt discovered in Wafangdian of Liaoning Province[N].Land and Resources of China,2017-04-18. [5] 赵秀英. 辽宁某地金伯利岩中铬铁矿与金刚石的关系[J].矿物学报,1982(1):21-29. Zhao X Y.The relation between chromite and diamond in the Liaoning kimberlite[J].Acta Mineralogica Sinica,1982(1):21-29. [6] 张安棣. 金刚石找矿指示矿物研究及数据库[M].北京:北京科学技术出版社,1991. Zhang A D.Study on Indicator Minerals for Diamond Prospecting and its Database[M].Beijing:Beijing Science and Technology Press,1991. [7] 董振信. 金伯利岩中铬尖晶石的特征及与其它岩类中铬尖晶石之对比[J].地质论评,1991,37(6):508-517. Dong Z X.Characteristics of CR-spinels in kimberiites and their comparison with those in other rocks[J].Geological Review,1991,37(6):508-517. [8] Gurney J J,Zweistra P.The interpretation of the major element compositions of mantle minerals in diamond exploration[J].Journal of Geochemical Exploration,1995,53(1/2/3):293-309. [9] Grütter H S,Gurney J J,Menzies A H,et al.An updated classification scheme for mantle-derived garnet,for use by diamond explorers[J].Lithos,2004,77(1/2/3/4):841-857. [10] Lenaz D,Princivalle F.The crystal chemistry of detrital chromian spinel from the southeastern Alps and Outer Dinarides:The discrimination of supplies from areas of similar tectonic setting?[J].The Canadian Mineralogist,2005,43(4):1305-1314. [11] Roeder P L,Schulze D J.Crystallization of groundmass spinel in kimberlite[J].Journal of Petrology,2008,49(8):1473-1495. [12] Chalapathi Rao N V,Lehmann B,Mainkar D,et al.Diamond-facies chrome spinel from the Tokapal kimberlite,Indrāvati basin,central India and its petrological significance[J].Mineralogy and Petrology,2012,105(3/4):121-133. [13] 周琦忠,张琪,冯学知,等.徐州睢宁白露山岩体中的铬铁矿化学成分及金刚石的含矿性研究[J].中国地质调查,2020,7(6):35-42. Zhou Q Z,Zhang Q,Feng X Z,et al.Chemical composition of the chromite and diamond potentiality of Bailushan rock mass in Suining area of Xuzhou[J].Geological Survey of China,2020,7(6):35-42. [14] 朱日祥,范宏瑞,李建威,等.克拉通破坏型金矿床[J].中国科学:地球科学,2015,45(8):1153-1168. Zhu R X,Fan H R,Li J W,et al.Decratonic gold deposits[J].Science China Earth Sciences,2015,58(9):1523-1537. [15] 路凤香. 金伯利岩与金刚石[J].自然杂志,2008,30(2):63-66. Lu F X.Kimberlite and diamond[J].Chinese Journal of Nature,2008,30(2):63-66. [16] Fan W M,Zhang H F,Baker J,et al.On and off the North China Craton:Where is the archaean keel[J].Journal of Petrology,2000,41(7):933-950. [17] 屈鑫. 胶东半岛中生代晚期花岗岩成因及其动力学意义[D].长沙:中南大学,2022. Qu X.Petrogenesis of Late Mesozoic Granite in the Jiaodong Peninsula and Its Geodynamic Implications[D].Changsha:Central South University,2022. [18] 万方来,蒋金晶,王煊.辽宁省瓦房店金伯利岩矿区地质构造分析[J].华东地质,2017,38(S1):83-84. Wan F L,Jiang J J,Wang X.Geological and structural characteristics in Wafangdian kimberlite ore field of Liaoning Province[J].East China Geology,2017,38(S1):83-84. [19] 万方来,蒋金晶,王煊,等.辽宁省瓦房店金伯利岩矿区构造特征及其控矿作用[J].地质通报,2019,38(1):62-67. Wan F L,Jiang J J,Wang X,et al.Geological characteristics and structural ore-control role in Wafangdian kimberlite orefield of Liaoning Province[J].Geological Bulletin of China,2019,38(1):62-67. [20] 谷文峰. 辽宁省瓦房店地区30号金伯利岩管磁异常特征分析[J].华东地质,2017,38(S1):87-89. Gu W F.Analysis of magnetic anomaly characteristics of No.30 kimberlite pipe in Wafangdian area,Liaoning Province[J].East China Geology,2017,38(S1):87-89. [21] 黄蕴慧,秦淑英,周秀仲,等.华北地台金伯利岩与金刚石[M].北京:地质出版社,1992. Huang Y H,Qin S Y,Zhou X Z,et al.Kimberlite and Diamond in North China Platform[M].Beijing:Geology Press,1992. [22] 宋瑞祥. 中国金刚石矿床专论:中国金刚石矿找矿与开发[M].北京:地质出版社,2013. Song R X.Monograph on diamond deposits in China:Exploration and Development of Diamond Deposits in China[M].Beijing:Geology Press,2013. [23] 贾晓丹. 辽宁瓦房店金伯利岩中铬尖晶石的矿物学特征及其指示意义[D].北京:中国地质大学(北京),2014. Jia X D.Mineralogical Characteristics and Indicative Significance of Chromium Spinel in Kimberlite,Wafangdian,Liaoning Province[D].Beijing:China University of Geosciences (Beijing),2014. [24] 迟广成,伍月.辽宁瓦房店金伯利岩中尖晶石族矿物种类划分及指示意义[J].岩矿测试,2014,33(3):353-358. Chi G C,Wu Y.The characteristics and classification of spinel group minerals in kimberlite in Wafangdian,Liaoning Province[J].Rock and Mineral Analysis,2014,33(3):353-358. [25] 居易,朱仁智,倪培,等.瓦房店30号岩管金伯利岩中尖晶石成分特征及其意义[J].矿物岩石地球化学通报,2016,35(6):1217-1225. Ju Y,Zhu R Z,Ni P,et al.Composition characteristics and significance of spinel in the Kimberlite from No.30 Pipe in the Wafangdian Area,China[J].Bulletin of Mineralogy,Petrology and Geochemistry,2016,35(6):1217-1225. [26] 董振信,丛安东,韩柱国.金伯利岩含金刚石性的矿物学判别标志[J].矿床地质,1993,12(1):48-54. Dong Z X,Cong A D,Han G Z.Mineralogical criteria for determination of diamond content in kimberlites[J].Mineral Deposits,1993,12(1):48-54. [27] 杨献忠,蔡逸涛,康丛轩,等.湖南桃源理公港地区含金刚石沉凝灰岩的发现及其找矿意义[J].中国地质调查,2019,6(6):56-62. Yang X Z,Cai Y T,Kang C X,et al.Discovery of diamond-bearing sedimentary tuff and its prospecting significance in Ligonggang area of Taoyuan County,Hunan Province[J].Geological Survey of China,2019,6(6):56-62. [28] Schulze D J.Origins of chromian and aluminous spinel macrocrysts from kimberlites in southern Africa[J].The Canadian Mineralogist,2001,39(2):361-376. [29] 倪培,朱仁智.华北克拉通金伯利岩型金刚石矿床含矿性判别[J].地质学报,2010,94(9):2557-2573. Ni P,Zhu R Z.Evaluating the diamond potential of kimberlite-hosted diamond deposits from the North China Craton[J].Acta Geologica Sinica,2020,94(9):2557-2573. [30] Kaminsky F V,Sablukov S M,Belousova E A,et al.Kimberlitic sources of super-deep diamonds in the Juina area,Mato Grosso State,Brazil[J].Lithos,2010,114(1/2):16-29. [31] Mitchell R H.Kimberlites:Mineralogy,Geochemistry,and Petrology[M].New York:Plenum Press,1986. [32] Sobolev N V.Deep-Seated Inclusions in Kimberlites and the Problem of the Composition of the Upper Mantle[M].Washington:American Geophysical Union,1974:266. [33] Minin V A,Prugov V P,Podgornykh N M,et al.Composition of chromites from kimberlites of the Botuobinskaya pipe in Yakutia[J].Geology of Ore Deposits,2011,53(7):626-638. [34] 路凤香. 华北克拉通古老岩石圈地幔的多次地质事件:来自金伯利岩中橄榄岩捕虏体的启示[J].岩石学报,2010,26(11):3177-3188. Lu F X.Multiple-geological events of ancient lithospheric mantle beneath North China craton:As inferred from peridotite xenoliths in kimberlite[J].Acta Petrologica Sinica,2010,26(11):3177-3188. [35] 罗声宣,任喜荣,朱源,等.山东金刚石地质[M].济南:山东科学技术出版社,1999. Luo S X,Ren X R,Zhu Y,et al.Geology of Shangdong Diamond Deposits[M].Ji'nan:Shandong Science and Technology Press,1999. [36] 彭艳菊,吕林素,周振华.中国金刚石资源分布及开发利用现状[J].宝石和宝石学杂志,2013,15(4):1-7. Peng Y J,Lyu L S,Zhou Z H.Distribution and utilization of diamond resources in China[J].Journal of Gems and Gemmology,2013,15(4):1-7. [37] Fabriès J.Spinel-olivine geothermometry in peridotites from ultramafic complexes[J].Contributions to Mineralogy and Petrology,1979,69(4):329-336. [38] 潘雪峰. 阿拉善地块南缘北大山地区特拜基性-超基性岩体岩石成因及构造意义[D].西安:长安大学,2019. Pan X F.Petrogenesis of Tebai Basic-Ultrabasic Pluton in the Beidashan Area in the Southern Margin of the Alax Block and it's Tectonic Significance[D].Xi'an:Chang'an University,2019. [39] 周登诗. 钻石之路[M].北京:地质出版社,2015. Zhou D S.The Road of Diamond[M].Beijing:Geology Press,2015. [40] 朱仁智,倪培,马玉广,等.安徽栏杆地区辉绿岩型原生金刚石特征及成因初探[J].南京大学学报:自然科学,2018,54(2):278-295. Zhu R Z,Ni P,Ma Y G,et al.Characteristics and genetic studies on primary diamonds from mafic rocks in Lan'gan area,Anhui Province[J].Journal of Nanjing University (Natural Science),2018,54(2):278-295. [41] 杨献忠,徐敏成,徐衍明,等.山东郯城地区安山质岩石中斑晶斜长石的复杂环带结构:岩浆混合作用的记录[J].中国地质调查,2022,9(6):33-41. Yang X Z,Xu M C,Xu Y M,et al.Complex zoning texture of phenocryst plagioclase in andesitic rocks of Tancheng area,Shandong Province:record of magma mixing[J].Geological Survey of China,2022,9(6):33-41.
2024, Vol. 11 
