摘要
文章通过对罗桥锡多金属矿区土壤地球化学元素分析表明,区内成矿元素地球化学背景值高,其中强富集元素Bi、Sn、As的丰度系数大于10,Pb、W、Be的平均含量高于地壳丰度4倍以上。元素空间分带性较明显,由大义山岩体向西到泥盆系分布区,出现从高温元素W、Sn、Bi、Be(Mo)—高中温元素Bi、Pb、Zn、As—中温元素Cu的变化,反映有岩浆热液活动特点。主成矿元素Sn与W、Be显著正相关,W、Be、Mo、Bi有很好的相关性,说明它们来自同一成矿阶段。当距离系数为15时,分别聚为W-Sn-Bi-Be-Mo-Cu-As和Pb-Zn两组。因子分析可将土壤元素分为高温与中温两个成矿元素组合,且高温元素与中温元素出现叠加,说明成矿的多期性;W、Sn、Bi、Be、Mo等高温成矿元素异常强度高、规模大,不同元素的异常套合好,尤其是W、Sn元素,具有很好的找矿潜力。提出了5处成矿地球化学异常找矿远景区。
The soil geochemical analysis of Luoqiao tin-polymetallic deposit shows that background value of the ore elements is high and abundance coefficient of the strongly enriched Bi、Sn、As is more than 10 and the average abundance of Pb、W、Be is more than 4times of the crustal abundance.The elements are obviously and spatially zoned.Westward from Dayishan to the Devonian strata are the high temperature element zone W、Sn、Bi、Be（Mo）—high-medium temperature zone Bi、Pb、Zn、As— medium zone Cu reflecting characteristics of the magmatic hydrothermal activity.The main ore element Sn shows positive correlation with W、Be and W、Be、Mo、Bi are obviously correlated that indicates they are derived from the same ore stage.When the distance coefficient is 15 the elements are clustered in two groups,W-Sn-Bi-Be-MoCu-As and Pb-Zn.Factor analysis of soil elements shows two groups：the high temperature and medium temperature groups.And they overprint each other showing that multi mineralization periods occur.The high temperature ore elements,W、Sn、Bi、Be、Mo anomlies are in high strength,large size and good anastomosis,especially tin and tungsten element has good ore prospects.
出处
《地质找矿论丛》
CAS
CSCD
2015年第4期602-607,共6页
Contributions to Geology and Mineral Resources Research
基金
国家自然科学基金(编号:41372360)资助
关键词
罗桥锡多金属矿
土壤地球化学特征
找矿意义
大义山
湖南省
Luoqiao tin-polymetallic deposit
soil geochemistry
prospecting significance
Dayishan
Hunan Province
