地球科学与环境学报
地毬科學與環境學報
지구과학여배경학보
JOURNAL OF EARTH SCIENCES AND ENVIRONMENT
2014年
1期
10-18
,共9页
王登红%何晗晗%黄凡%王永磊
王登紅%何晗晗%黃凡%王永磊
왕등홍%하함함%황범%왕영뢰
小岩体%成矿%找矿%华南成矿省%扬子成矿省
小巖體%成礦%找礦%華南成礦省%颺子成礦省
소암체%성광%조광%화남성광성%양자성광성
small intrusion%mineralization%exploration%South China metallogenic province%Yangtze metallogenic province
国内外一些规模很大的金属矿床常常出现在一些规模不大的小岩体附近或者小岩体本身就含矿,由此出现了“小岩体成矿”甚至成大矿的现象,如江西德兴铜矿田、湖南骑田岭钨多金属矿集区、广西大厂锡多金属矿集区、广东贵东铀矿田等都存在这种现象。通过对华南扬子成矿省和华南成矿省小岩体成矿多种现象的分析,认为小岩体成矿对于成矿时代、矿床类型、矿种及成因等并无特定的选择,但可能更多地反映了矿床的保存条件,而其深部往往有大岩基。大岩基周围的小岩体尤其值得重视,而孤立的小岩体可能成矿不好,大岩基内部的小岩体以往被忽视了,斜向侵位的小岩体对于结晶分异和多矿种组合具有特别重要的意义。华南地区目前对于小岩体成矿的问题,探讨更多的实际上是小岩体的找矿问题,而对于小岩体成矿机制的研究程度还比较低,需要加强。
國內外一些規模很大的金屬礦床常常齣現在一些規模不大的小巖體附近或者小巖體本身就含礦,由此齣現瞭“小巖體成礦”甚至成大礦的現象,如江西德興銅礦田、湖南騎田嶺鎢多金屬礦集區、廣西大廠錫多金屬礦集區、廣東貴東鈾礦田等都存在這種現象。通過對華南颺子成礦省和華南成礦省小巖體成礦多種現象的分析,認為小巖體成礦對于成礦時代、礦床類型、礦種及成因等併無特定的選擇,但可能更多地反映瞭礦床的保存條件,而其深部往往有大巖基。大巖基週圍的小巖體尤其值得重視,而孤立的小巖體可能成礦不好,大巖基內部的小巖體以往被忽視瞭,斜嚮侵位的小巖體對于結晶分異和多礦種組閤具有特彆重要的意義。華南地區目前對于小巖體成礦的問題,探討更多的實際上是小巖體的找礦問題,而對于小巖體成礦機製的研究程度還比較低,需要加彊。
국내외일사규모흔대적금속광상상상출현재일사규모불대적소암체부근혹자소암체본신취함광,유차출현료“소암체성광”심지성대광적현상,여강서덕흥동광전、호남기전령오다금속광집구、엄서대엄석다금속광집구、엄동귀동유광전등도존재저충현상。통과대화남양자성광성화화남성광성소암체성광다충현상적분석,인위소암체성광대우성광시대、광상류형、광충급성인등병무특정적선택,단가능경다지반영료광상적보존조건,이기심부왕왕유대암기。대암기주위적소암체우기치득중시,이고립적소암체가능성광불호,대암기내부적소암체이왕피홀시료,사향침위적소암체대우결정분이화다광충조합구유특별중요적의의。화남지구목전대우소암체성광적문제,탐토경다적실제상시소암체적조광문제,이대우소암체성광궤제적연구정도환비교저,수요가강。
It is a common phenomenon that large-scale mineral deposits occur around small intrusions or host within small intrusive bodies domestic and oversea.Such phenomena can be called as “mineralization with small intrusion”.The phenomena occur in Dexing copper ore field in Jiangxi,Qitianling tungsten-polymetal ore concentration area in Hunan,Dachang tin-polymetal ore concentration area in Guangxi and Guidong uranium ore field in Guangdong,etc.Based on the variety phenomena of mineralization with small intrusion in South China metallogenic province and Yangtze metallogenic province,there is no choice for specific metallogenic epoch,deposit types,minerals assemblage or genesis, etc.Such phenomenon may reflect the preservation conditions of deposits more than ore genesis,and there is often a large batholith below the small intrusions with ore deposit.It is especially noteworthy for small intrusions around a large batholith,while isolated small intrusions may be poorly mineralized.As to the small intrusions intruded within large batholith,which has been ignored in the past,those small intrusions obliquely emplaced into host rocks might be important for mineralization.More attention has been paid on exploration large-scale deposits around small intrusions than the research on the mechanism of mineralization by small intrusion in South China,so that the study extent of mineralization mechanism,which is still relatively low,needs to be strengthened.