CAJ | 학술논문

连巴岭铅锌矿区位于太行山北段涞源花岗岩体北侧与阜平变质核杂岩北西缘,产于乌龙沟-上黄旗深断裂带的次级平行断裂带中.分析了连巴岭铅锌矿床成矿地质背景、矿相学特征以及控矿构造,对比研究了矿石 S-Pb 同位素组成,探讨了成矿物质来源,建立了成矿模式.结果表明：金属硫化物样品(黄铁矿、闪锌矿、黄铜矿、方铅矿)的硫同位素组成为(-2．7~6．9)×10-3,多数集中在(-1~3)×10-3,平均值为1.1×10-3,与地幔硫接近；硫同位素组成频率直方图呈塔式分布,表明其深源岩浆硫的特点；矿石铅同位素组成稳定,花岗岩是主要的成矿母岩,成矿物质具有壳幔混合特点,并来源于上地幔-下地壳物质部分熔融形成的岩浆.连巴岭铅锌矿床成矿模式为：岩层因受到多种构造应力的影响而发生变形和破裂；中生代燕山运动引起次一级的褶曲断裂和节理,使地壳变得更加虚弱；基底的王安镇岩体发生断裂,花岗岩体乘机侵入；然后酸性、中性、基性岩脉侵入,由于颗粒细小,近于致密,渗透性差的中性岩脉起到屏蔽、遮挡作用,使得含矿热液与白云岩发生交代作用而聚集堆积形成矿体.
련파령연자광구위우태행산북단래원화강암체북측여부평변질핵잡암북서연,산우오룡구-상황기심단렬대적차급평행단렬대중.분석료련파령연자광상성광지질배경、광상학특정이급공광구조,대비연구료광석 S-Pb 동위소조성,탐토료성광물질래원,건립료성광모식.결과표명：금속류화물양품(황철광、섬자광、황동광、방연광)적류동위소조성위(-2．7~6．9)×10-3,다수집중재(-1~3)×10-3,평균치위1.1×10-3,여지만류접근；류동위소조성빈솔직방도정탑식분포,표명기심원암장류적특점；광석연동위소조성은정,화강암시주요적성광모암,성광물질구유각만혼합특점,병래원우상지만-하지각물질부분용융형성적암장.련파령연자광상성광모식위：암층인수도다충구조응력적영향이발생변형화파렬；중생대연산운동인기차일급적습곡단렬화절리,사지각변득경가허약；기저적왕안진암체발생단렬,화강암체승궤침입；연후산성、중성、기성암맥침입,유우과립세소,근우치밀,삼투성차적중성암맥기도병폐、차당작용,사득함광열액여백운암발생교대작용이취집퇴적형성광체.
Lianbaling Pb-Zn mining area,which is located in the northern of Laiyuan granite rock and the northwest of Fuping metamorphic core complex from the northern Taihang Mountains, develops in secondary parallel fault zone of Wulonggou-Shanghuangqi deep fault zone.Ore-forming geological background,characteristics of ore microscopy and ore-controlling structure of Lianbaling Pb-Zn deposit were analyzed,and S-Pb isotopic compositions of ore were studied,and ore-forming material sources were discussed,and metallogenic model was built.The results show that S isotopic compositions of metal sulfides (pyrite,sphalerite,chalcopyrite,galena )are (-2.7-6.9)×10 -3 with the average of 1.1 × 10 -3 and mainly (- 1-3)× 10 -3 ,and are close to mantle sulfur;the distribution of frequency histogram of S isotopic composition,which is the type of tower,presents the characteristic of deep origin magma sulfur;Pb isotopic composition of ore is stable,granite is the main ore-controlling mother rock,and metallogenic material,which has the characteristic of crust-mantle mixing,comes from magma formed by partial melting of the upper mantle-lower crust.The metallogenic model of Lianbaling Pb-Zn deposit includes that the strata deform and rupture because of various tectonic stresses;Mesozoic Yanshanian movement causes secondary fold fracture and joint,and makes the crust more fragile;Wang'anzhen complex of batholith ruptures,and then granite body intrudes;acidic,intermediate and mafic dykes later intrude,and intermediate dyke with low permeability has shield and shelter effects because of fine particle close to the density,and causes the metasomatism between ore-bearing hydrothermal solution and dolomite in order to aggregate and accumulate the orebody.