胶东新城金矿元素地球化学特征
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摘要
通过对胶东新城金矿床金品位分形分布和多元素聚类分析,讨论多阶段成矿作用叠加信息。新城金矿Ⅰ号矿体的金品位分形分布具有分段拟合特征,分维值分别为2.2948和0.5845,说明存在两个阶段的叠加成矿作用。Ⅴ号矿体的金品位分形分布具有单一拟合特征,分维值为0.8831,说明不存在多阶段叠加成矿作用。多元素聚类分析显示,金元素与银及其他多金属成矿元素相关性较差,可能是独立的成矿作用,后期有银多金属成矿作用的叠加。金品位分形特征和多元素聚类分析得到的认识与前人通过地质研究得到的认识是一致的。
We made Au grade fractal distribution and multi-element cluster analysis to theⅠand Ⅴgold ore bodies of the Xincheng gold deposit,and discussed their implication on superimposed mineralization.The Au grade of theⅠore body show multi-fractal distribution with fractal values at 2.2948 and 0.5845 which imply two stage superimposed mineralization.The Au grade of the Ⅴore body show single-fractal distribution with fractal value at 0.8831 which implies no superimposed mineralization.The multi-element cluster analysis shows that the Au has no obvious relation to other base metal elements,which indicate that the Au would be an independent mineralization event added by later Ag and other base metal mineralization.The Au grade fractal distribution and multi-element cluster analysis are all agree with previous studies on geological characters.
We made Au grade fractal distribution and multi-element cluster analysis to theⅠand Ⅴgold ore bodies of the Xincheng gold deposit,and discussed their implication on superimposed mineralization.The Au grade of theⅠore body show multi-fractal distribution with fractal values at 2.2948 and 0.5845 which imply two stage superimposed mineralization.The Au grade of the Ⅴore body show single-fractal distribution with fractal value at 0.8831 which implies no superimposed mineralization.The multi-element cluster analysis shows that the Au has no obvious relation to other base metal elements,which indicate that the Au would be an independent mineralization event added by later Ag and other base metal mineralization.The Au grade fractal distribution and multi-element cluster analysis are all agree with previous studies on geological characters.
引文
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[2]杨进辉.胶东地区金矿床成矿时代及其成矿地球动力学背景——兼论壳幔相互作用与成岩成矿[D].北京:中国科学院地质与地球物理研究所,2000:1～133.YANG Jin-hui.Age and metallogenic dynamics of gold mineralization in Jiaodong Peninsula,eastern China:Constraints on the interaction of mantle/crust and metallogenesis/lithospheric evolution[D].Beijing:Institute of Geology and Geophysics,Chinese Academy of Sciences,2000:1～133.
[3]董敏.新城金矿构造控矿及矿体三维定位预测[D].西安:长安大学,2010:1～81.DONG Min.Structure ofore-controlling and stero-predietion of ore body location of Xincheng gold deposit[D].Xi'an:Chang'an University,2010:1～81.
[4]孟宪伟,窦明晓,余先川.地球化学场分解的理论与方法[J].地球科学进展,1994,9(6):59～64.MENG Xian-wei,DOU Ming-xiao,YU Xian-chuan.Theories and methods on the dispersion of geochemical field[J].Advance in Earth Sciences,1994,9(6):59～64.
[5]孟宪伟,张晓华.多标度分形与地球化学场分解[J].地质与勘探,1996,32(4):47～49.MENG Xian-wei,ZHANG Xiao-hua.Multifraction and dispersion of geochemical field[J].Geology and Prospecting,1996,32(4):47～49.
[6]成秋明.多维分形理论和地球化学元素分布规律[J].地球科学,2000,25(3):311～318.CHENG Qiu-ming.Multifractal theory and geochemical element distribution pattern[J].Earth Science:Journal of China University of Geosciences,2000,25(3):311～318.
[7]成秋明.多重分形与地质统计学方法用于勘查地球化学异常空间结构和奇异性分析[J].地球科学,2001,26(2):161～166.CHENG Qiu-ming.Multi fractal and geostatistic methods for characterizing local structure and singularity properties of exploration geochemical anomalies[J].Earth Science:Journal of China University of Geosciences,2001,26(2):161～166.
[8]申维.分形混沌与矿产预测[M].北京:地质出版社,2002:1～18.SHEN Wei.Fractal and chaos with application in mineral resource prediction[M].Beijing:Geological Publishing House,2002:1～18.
[9]施俊法,向运川,王春宁.区域地球化学异常空间分形结构及其意义———以浙江省诸暨地区区域地球化学数据为例[J].矿物学报,2000,20(1):68～72.SHI Jun-fa,XIANG Yun-chuan,WANG Chun-ning.Fractal spatial structure of regional geochemical anomalies and its implication evidence from regional geochemical data in Zhuji,Zhejiang Province[J].Acta Mineralogica Sinica,2000,20(1):68～72.
[10]施俊法.浙江省诸暨地区元素地球化学分布与标度律[J].地球科学:中国地质大学学报,2001,26(2):167～171.SHI Jun-fa.Element geochemical distribution from Zhuji area,Zhejiang Province and scaling laws[J].Earth Science:Journal of China University of Geosciences,2001,26(2):167～171.
[11]刘连登,陈国华,张辉煌,等.世界级胶东金矿集中区两类成矿地球动力学环境[J].矿床地质,2002,21(增刊):36～39.LIU Lian-deng,CHEN Guo-hua,ZHANG Hui-huang,et al.Two geodynamic settings for mineralization in Jiaodong gold metallogenetic region[J].Mineral Deposits,2002,21(Supp.):36～39.