中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2013年
9期
2726-2735
,共10页
流体包裹体%成矿作用%锡多金属矿床%大福楼%大厂
流體包裹體%成礦作用%錫多金屬礦床%大福樓%大廠
류체포과체%성광작용%석다금속광상%대복루%대엄
fluid inclusion%mineralization%Sn-polymetallic deposit%Dafulou%Dachang
通过对大厂矿田大福楼矿床的岩石学、矿物学、构造地质学以及流体包裹体等方面的系统分析，解析矿床地质以及成矿流体特征。结果表明，大福楼矿区主要发育硅化、碳酸盐化、绢云母化、黄铁矿化以及磁黄铁矿化等5种围岩蚀变类型，产出有层状、穿层状以及网脉状等矿化类型。矿石结构主要为交代结构、自形?半自形粒状结构、固溶体结构等，矿石构造表现为块状、浸染状、细脉状、网脉状和角砾状等，主要发育有浸染状、致密块状、细脉状和角砾状等多种矿石类型。研究显示，大福楼矿床主要存在6种流体包裹体类型，包括单相气相包裹体、单相盐水溶液包裹体、两相富蒸汽包裹体、两相富液体包裹体、三相含CO2包裹体以及富NaCl子矿物包裹体，流体形成的主体温度范围为120~150°C、230~270°C以及350~460°C。然而，成矿流体则主要形成于高温环境下，即350~460°C。成矿过程中，构造作用至关重要，通常控制着锡矿体的规模、产状以及形态。鉴别出4种热液流体类型，包括 H2O?NaCl?CaCl2体系、H2O?CaCl2体系、H2O?NaCl?MgCl2体系以及 H2O?MgCl2体系。与大厂矿田的其他矿床具有相似之处，大福楼矿床也同样具有多种成矿流体来源的特征，总体上属于壳幔联合作用的产物。
通過對大廠礦田大福樓礦床的巖石學、礦物學、構造地質學以及流體包裹體等方麵的繫統分析，解析礦床地質以及成礦流體特徵。結果錶明，大福樓礦區主要髮育硅化、碳痠鹽化、絹雲母化、黃鐵礦化以及磁黃鐵礦化等5種圍巖蝕變類型，產齣有層狀、穿層狀以及網脈狀等礦化類型。礦石結構主要為交代結構、自形?半自形粒狀結構、固溶體結構等，礦石構造錶現為塊狀、浸染狀、細脈狀、網脈狀和角礫狀等，主要髮育有浸染狀、緻密塊狀、細脈狀和角礫狀等多種礦石類型。研究顯示，大福樓礦床主要存在6種流體包裹體類型，包括單相氣相包裹體、單相鹽水溶液包裹體、兩相富蒸汽包裹體、兩相富液體包裹體、三相含CO2包裹體以及富NaCl子礦物包裹體，流體形成的主體溫度範圍為120~150°C、230~270°C以及350~460°C。然而，成礦流體則主要形成于高溫環境下，即350~460°C。成礦過程中，構造作用至關重要，通常控製著錫礦體的規模、產狀以及形態。鑒彆齣4種熱液流體類型，包括 H2O?NaCl?CaCl2體繫、H2O?CaCl2體繫、H2O?NaCl?MgCl2體繫以及 H2O?MgCl2體繫。與大廠礦田的其他礦床具有相似之處，大福樓礦床也同樣具有多種成礦流體來源的特徵，總體上屬于殼幔聯閤作用的產物。
통과대대엄광전대복루광상적암석학、광물학、구조지질학이급류체포과체등방면적계통분석，해석광상지질이급성광류체특정。결과표명，대복루광구주요발육규화、탄산염화、견운모화、황철광화이급자황철광화등5충위암식변류형，산출유층상、천층상이급망맥상등광화류형。광석결구주요위교대결구、자형?반자형립상결구、고용체결구등，광석구조표현위괴상、침염상、세맥상、망맥상화각력상등，주요발육유침염상、치밀괴상、세맥상화각력상등다충광석류형。연구현시，대복루광상주요존재6충류체포과체류형，포괄단상기상포과체、단상염수용액포과체、량상부증기포과체、량상부액체포과체、삼상함CO2포과체이급부NaCl자광물포과체，류체형성적주체온도범위위120~150°C、230~270°C이급350~460°C。연이，성광류체칙주요형성우고온배경하，즉350~460°C。성광과정중，구조작용지관중요，통상공제착석광체적규모、산상이급형태。감별출4충열액류체류형，포괄 H2O?NaCl?CaCl2체계、H2O?CaCl2체계、H2O?NaCl?MgCl2체계이급 H2O?MgCl2체계。여대엄광전적기타광상구유상사지처，대복루광상야동양구유다충성광류체래원적특정，총체상속우각만연합작용적산물。
Based on the study of the petrology, mineralogy, structural geology and fluid inclusion of the Dafulou ore deposit in the Dachang ore field, the ore deposit geology and ore-forming fluids were analyzed. It shows that there are five main hydrothermal alteration types in the Dafulou ore district, namely the silicification, carbonate, sericite, pyrite and pyrrhotite. The mineralization types are composed of the stratiform type, interlayer type and stockwork type. The ore textures present as metasomatic texture, euhedral-subhedral granular texture and solid solution texture. The ore structure consists of massive structure, dissemination structure, fine veined structure, stockwork structure and brecciated structure. Four ore types are recognized, namely the disseminated ore, dense massive ore, veinlet ore and brecciated ore. Six types of fluid inclusions are determined, i.e. the single-phase gaseous fluid inclusions, single-phase salt solution fluid inclusions, two-phase vapour-rich fluid inclusions, two-phase liquid-rich fluid inclusions, three-phase CO2-rich fluid inclusions and solid(s)-bearing fluid inclusions, all of which form in three dominant temperature scopes, 120?150, 230?270, 350?460 °C. But, the majority of them form in the high temperature environment (350?460 °C). The tectonism plays an important role in the mineralization, which usually controls the scale, occurrence and shape of the Sn orebody. There are four types of hydrothermal fluid systems, H2O?NaCl?CaCl2, H2O?CaCl2, H2O?NaCl?MgCl2 and H2O?MgCl2. Similar to the other ore deposits in the Dachang ore field, there also exists the multiple source of ore-forming fluids. Overall, the Dafulou ore deposit should be the result of the crust?mantle interaction.
