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时间:2020-03-25
《成都经济区近地表大气尘地球化学基线.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第31卷第1期地质通报Vo1-31.NO.12012年1月GE0LoGICALBULLETINOFCHINAJan.,2012·应用地球化学·成都经济区近地表大气尘地球化学基线施泽明r,倪师军1I2,张成江,-,阚泽忠。,葛良全SHIZe—ming1,2,NIShi-jLln1,2,ZHANGCheng-jiang1'2,KANZe—zhong3,GELiang—quan。1.成都理工大学地球化学系,四川成都610059:2.四川省地学核技术重点实验室,四川成都610059:3.四川省地质调查院。四川成都6100811.Departmen
2、tofGeochemistry,ChengduUniversityofTechnology,Chengdu610059,Sichuan,China,"2.KeyLaboratoryofNuclearTechniquesinGeosciencesofSichuanProvince,Chengdu610059,Sichuan,China,3.GeologicalSurveyInstituteofSichuanProvince,Chengdu610081,Sichuan,China摘要:成都经济区近地表大气尘中重金属元素含量空间分布显示,经济区
3、中东部高于西部,北部高于中南部,重工业城市高于综合性城市和旅游城市.工矿影响区元素含量总体偏高,人口密集的平原区高于山区。通过标准极限方法确定了近地表大气尘中元素的“极限浓度”.以低于“极限浓度”值统计确定了地球化学基线值:As为28.6mg/kg、Hg0.63mg/kg、Cd2.94mg/kg、Crll0mg/kg、Pb281mg/kg、Ni32mg/kg、Zn535mg/kg。近地表大气尘中元素地球化学基线与区域地质背景和矿产开发有关,矿业活动、工业活动及居民生活是造成近地表大气尘中人为扰动元素含量偏高的主要原因。关键词:近地表大气尘
4、;地球化学基线;成都经济区;空间分布中图分类号:X131.1;X131.3;X142文献标志码:A文章编号:1671-2552(2012)O1—0090—07ShiZM,NiSJ,ZhangCJ,KanZZ,GeLQ.Thegeochemicalbaselineofnear—groundairdustinChengdueconomicre—gion.GeologicalBulletinofChina,2012,31(1):90-96Abstract:Theheavymetalsdistributionofnear——groundairdu
5、stinChengdueconomicregionshowsthatthecontentofheaWmetalsinthemiddle—eastpartishigherthanthatinthewestpart,andthatintheheaWindustrycityishigherthanthatinthecomprehensivecityandtouristcity.Theheavymetalcontentistotallyhighinindustryandmineinfluencingareas,andthatintheplaint
6、errainofdensepopulationishigherthanthatinthemountainarea.ThestandardlimitmethodwasusedtOdeterminetheelementlimitingcon—centrationinnear—groundairdust,andthestatisticsofvaluesbelowthelimitingconcentrationvaluewasemployedtOdeterminethegeochemicalbaselinevalues,andthevalueso
7、btainedareasfollows:As28.6mg/kg,Hg0.63mg/kg,Cd2.94mg/kg,Cr110mg/kg,Pb281mg/kg,Ni32mg/kgandZn535mg/kg.Elementsingeochemicalbaselineofnear—groundairdustarerelatedtOregionalgeologicalbackgroundandmineraldevelopment.Miningactivity,industrialactivityandresidentslivesconstitute
8、themainfactorsre—sponsiblefortherelativelyhighcontentofartificialdisturbanceelementsofnear—groun
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