山东国土资源
山東國土資源
산동국토자원
LAND AND RESOURCES IN SHANGDONG PROVINCE
2011年
12期
7-10
,共4页
于林松%刘洪波%李世勇%曹秀华%吕其卫%王宁
于林鬆%劉洪波%李世勇%曹秀華%呂其衛%王寧
우림송%류홍파%리세용%조수화%려기위%왕저
铜多金属成矿%构造-岩浆事件%联系%邹平火山岩盆地
銅多金屬成礦%構造-巖漿事件%聯繫%鄒平火山巖盆地
동다금속성광%구조-암장사건%련계%추평화산암분지
Copper polymetallic deposit%tectonic- magmatic event%Zouping volcanic basin
通过邹平火山岩盆地不同岩石类型岩石化学特征的对比分析:认为火山活动总的趋势是由弱到强,爆发指数为38—68—92;火山岩3个亚组SI值均〈40,表明母岩浆可能是由幔源岩浆经分异演化或同化而形成的;侵入岩口介于2.39~4.99,属钙碱性一碱性岩系;DI为65.15~88.98,岩浆分异演化程度相对较高;A/NKC为0.96~1.02,岩石为弱过铝质。该区岩浆岩属壳幔型中性岩一壳幔型和铝质地壳过渡区中酸性岩一酸性岩的岩浆岩区。铜多金属对构造一岩浆事件的响应可描述为:长期继承性活动的区域性构造和振荡性的岩浆侵入活动,致使富碱质岩浆热液与已结晶的二长质岩石在地球化学界面发生交代蚀变,并进行了物质交换。
通過鄒平火山巖盆地不同巖石類型巖石化學特徵的對比分析:認為火山活動總的趨勢是由弱到彊,爆髮指數為38—68—92;火山巖3箇亞組SI值均〈40,錶明母巖漿可能是由幔源巖漿經分異縯化或同化而形成的;侵入巖口介于2.39~4.99,屬鈣堿性一堿性巖繫;DI為65.15~88.98,巖漿分異縯化程度相對較高;A/NKC為0.96~1.02,巖石為弱過鋁質。該區巖漿巖屬殼幔型中性巖一殼幔型和鋁質地殼過渡區中痠性巖一痠性巖的巖漿巖區。銅多金屬對構造一巖漿事件的響應可描述為:長期繼承性活動的區域性構造和振盪性的巖漿侵入活動,緻使富堿質巖漿熱液與已結晶的二長質巖石在地毬化學界麵髮生交代蝕變,併進行瞭物質交換。
통과추평화산암분지불동암석류형암석화학특정적대비분석:인위화산활동총적추세시유약도강,폭발지수위38—68—92;화산암3개아조SI치균〈40,표명모암장가능시유만원암장경분이연화혹동화이형성적;침입암구개우2.39~4.99,속개감성일감성암계;DI위65.15~88.98,암장분이연화정도상대교고;A/NKC위0.96~1.02,암석위약과려질。해구암장암속각만형중성암일각만형화려질지각과도구중산성암일산성암적암장암구。동다금속대구조일암장사건적향응가묘술위:장기계승성활동적구역성구조화진탕성적암장침입활동,치사부감질암장열액여이결정적이장질암석재지구화학계면발생교대식변,병진행료물질교환。
Through comparing petrochernistry characteristics of Zouping volcanic basin, it is regarded that general trend of volcanic activity is from weak to strong, and explosive index is 38 - 68 - 92. SI values of volcanic rocks in three sub --formation are less than 40, which indicate that mother magama originated from the mantle might experience a process of magmatic differentiation or magnetic assimilation, a values of intrusive rocks are from 2. 39 to 4. 99 ,which belong to calc- alkaline series. DI values are 65. 15~88. 98. It indicates that magmatic differentiation is high. A~ NKC values are 65.15~88. 98. It demonstrates inferior aluminous. Response of copper polymetallic deposit and tec- tone- magmatic event can be described that inherited tectonic movement and multiple magma intrusion make alkaline magmatic - hydrothermal and crystallized monzonite occur metasomatism and alteration, and make ore - forming mate-rial interchanges near their geochemical interface.