黄金
黃金
황금
GOLD JOURNAL
2014年
12期
14-18
,共5页
罗正传%魏明君%陈树民%曹廷坤%张喆%王安
囉正傳%魏明君%陳樹民%曹廷坤%張喆%王安
라정전%위명군%진수민%조정곤%장철%왕안
大方山金矿床%铅同位素%硫同位素%成矿物质%河南
大方山金礦床%鉛同位素%硫同位素%成礦物質%河南
대방산금광상%연동위소%류동위소%성광물질%하남
Dafangshan Gold Deposit%lead isotope%sulfur isotope%ore-forming material%Henan
对大方山金矿床主成矿阶段矿石中硫化物的铅、硫同位素地球化学特征进行了研究,结果表明:大方山金矿床主成矿阶段铅同位素变化范围不大,属正常铅。利用计算获得相关特征参数、铅构造模式图及Δβ-Δγ成因相关图解综合分析,认为矿石铅主要来源于地幔,但受到壳源铅不同程度的混染;硫同位素组成变化范围为1.1‰~4.0‰,平均值为2.3‰,与幔源硫的同位素组成比较接近,表明硫主要来源于地幔,有地壳硫的加入。综合分析认为该矿床成矿物质来源于造山过程中壳-幔混合源,以幔源为主。
對大方山金礦床主成礦階段礦石中硫化物的鉛、硫同位素地毬化學特徵進行瞭研究,結果錶明:大方山金礦床主成礦階段鉛同位素變化範圍不大,屬正常鉛。利用計算穫得相關特徵參數、鉛構造模式圖及Δβ-Δγ成因相關圖解綜閤分析,認為礦石鉛主要來源于地幔,但受到殼源鉛不同程度的混染;硫同位素組成變化範圍為1.1‰~4.0‰,平均值為2.3‰,與幔源硫的同位素組成比較接近,錶明硫主要來源于地幔,有地殼硫的加入。綜閤分析認為該礦床成礦物質來源于造山過程中殼-幔混閤源,以幔源為主。
대대방산금광상주성광계단광석중류화물적연、류동위소지구화학특정진행료연구,결과표명:대방산금광상주성광계단연동위소변화범위불대,속정상연。이용계산획득상관특정삼수、연구조모식도급Δβ-Δγ성인상관도해종합분석,인위광석연주요래원우지만,단수도각원연불동정도적혼염;류동위소조성변화범위위1.1‰~4.0‰,평균치위2.3‰,여만원류적동위소조성비교접근,표명류주요래원우지만,유지각류적가입。종합분석인위해광상성광물질래원우조산과정중각-만혼합원,이만원위주。
In this paper ,geochemical characteristics of lead and sulfur isotopes in sulfide ores in the main metallo-genic stage of Dafangshan Gold Deposit are studied .The results show that the variation range of lead isotope in the main metallogenic stage of Dafangshan Gold Deposit is not obvious , indicating normal lead .Comprehensive analysis based on correlated characteristic parameters ,the lead structure model diagram and Δβ-Δγcause related illustration obtained from calculation holds that the lead in ores mainly derived from the mantle ,but was contaminated by shell source lead in different levels;isotopic compositions of sulfur range from 1.1‰to 4.0‰,average 2.3‰,close to the sulfur isotopic compositions of the mantle source , which shows that sulfur mainly derived from the mantle and mixed with crust sulfur .Comprehensive analysis takes that the deposit ore-forming materials come from orogenic process of the mixed crust-mantle source ,mainly the mantle source .