CAJ | 학술논문

新疆塔木铅锌矿赋存于石炭系碳酸盐岩断层破碎带中,矿体和手标本尺度呈现管/脉构造特点.管/脉壁主要由闪锌矿、方铅矿构成,管/脉中心充填白云石Ⅱ,管内可见钡-钾长石微粒,暗示成矿流体淋滤下伏地质体.充填期白云石Ⅱ较第Ⅰ期白云岩化灰岩表现出贫~(13)C、~(18)O的特点,反映成矿过程可能存在贫~(13)C、~(18)O的物质加入.鉴于白云石Ⅱ流体包裹体均一温度为119～191℃、闪锌矿流体包裹体存在CH_4、C_2H_6、H_2S气相组分、邻区达木斯乡和什拉甫剖面下石炭统有4个沥青显示点和24个荧光显示点、麦盖提斜坡海相石炭系曲1井、麦3井原油δ~(13)C介于-34‰～-31‰之间及流体包裹体液相组分未见SO_4~(2-),可以推测成矿作用与热化学硫酸盐还原(TSR)过程相关.综合上述因素,可以认为新疆塔木铅锌矿为后生的与TSR作用相关的矿床.
신강탑목연자광부존우석탄계탄산염암단층파쇄대중,광체화수표본척도정현관/맥구조특점.관/맥벽주요유섬자광、방연광구성,관/맥중심충전백운석Ⅱ,관내가견패-갑장석미립,암시성광류체림려하복지질체.충전기백운석Ⅱ교제Ⅰ기백운암화회암표현출빈~(13)C、~(18)O적특점,반영성광과정가능존재빈~(13)C、~(18)O적물질가입.감우백운석Ⅱ류체포과체균일온도위119～191℃、섬자광류체포과체존재CH_4、C_2H_6、H_2S기상조분、린구체목사향화십랍보부면하석탄통유4개력청현시점화24개형광현시점、맥개제사파해상석탄계곡1정、맥3정원유δ~(13)C개우-34‰～-31‰지간급류체포과체액상조분미견SO_4~(2-),가이추측성광작용여열화학류산염환원(TSR)과정상관.종합상술인소,가이인위신강탑목연자광위후생적여TSR작용상관적광상.
Tamu lead and zinc ore deposit locates in a fault fragmental belt of Carboniferous carbonate. Pipe-liked ore bodies distribute in the fragmental belt on macro scale and hand specimen scale. Sphalerite and galena constitute the wall of pipe, and the core is filled by dolomite Ⅱ. The particulate of hyalophane found in the pipe for the first time implies some parts of deeper materials have been leached. Comparing with dolostone Ⅰ, dolomite Ⅱ is depleted in ~(13)C and~(18)O, implying addition of ~(13)C and ~(18)O depleted materials. Taking account of the homogeneous temperature of fluid inclusions in dolomite Ⅱ (119 - 191 ℃ ), the CH_4-C_2H_6-H_2S gas composition of sphalerite fluid inclusions, four bitumen points and 24 fluorescence points in Heshilafu section, the negative δ~(13)C of -34 to -31 per mille of marine Carboniferous oil of Qu-1 well and Mai-3 well in Magaiti slope, and the absence of SO_4~(2-) in the fluid inclusion, it is likely that the ore deposit was associated with thermal sulfate reduction (TSR). Therefore,Tamu lead and zinc ore deposit is epigenetic.