吉林省金城洞地区金矿成矿物质来源

J4 ›› 1998, Vol. 6 ›› Issue (3): 22-29.

吉林省金城洞地区金矿成矿物质来源

曾庆栋¹,沈远超¹,戴新义²

1.中国科学院地质研究所北京 100029;
2.吉林省地质研究所长春 130012

收稿日期:1998-03-11 出版日期:1998-06-28 发布日期:2011-11-07
作者简介:曾庆栋,男,1964年12月生,主要从事矿床学、构造地质学方面工作。
基金资助:
地矿部“八五”科技攻关项目(编号:85-01-002-02-01)

ORE-Forming MATERIAL RESOURCES OF GOLD DEPOSITS IN JIN CHENG DONG AREA JILLN PROVINCE

Zeng Qingdong¹，Sheng Yuanchao¹，Dai Xinyi²

1.Institute of geology,Chinese Academy of sciences Beijing 100029；
2.Jilin Institute of Geologicl sciences Changchun 130012

Received:1998-03-11 Online:1998-06-28 Published:2011-11-07

摘要/Abstract

摘要：

金城洞地区金矿按产出地质背景划分为产于晚太古宙变质岩系中的金矿和产于花岗岩侵入体中的金矿。变质岩系金丰度分析表明,本区变质岩石金丰度背景值为2.04×10^-9,花岗岩金丰度分析表明,中生代二长岩中金丰度为66.07×10^-9,其它花岗岩中则较低,为0.7～2.83×10^-9;各类岩石金易溶性实验表明,区内斜长角闪岩、二长岩、煌斑岩中金呈易释放金形式存在,可为金矿成矿提供部分成矿物质,其它岩石中金呈不易释放金的形式存在。区内岩(矿)石硫同位素组成δ³⁴S在+0.04～+4.8‰之间,与陨石硫δ³⁴S 值(-1～+5.1‰)相近;各类岩(矿)石稀土元素模式曲线平行分布,以LREE富集、弱—无铕异常为特征,反映了它们具有相似的来源;各类铅同位素分析表明,变质岩、花岗岩、金矿石的铅同素组成投点均落于μ=8.5和μ=9.58之间,进一步反映了成矿物质来源于深源(下地壳和上地幔之间) 。

关键词: 物质来源, 金矿, 金城洞, 吉林省

Abstract:

Gold deposits in Jinchengdong area can be devided into two types,one occur late-Archean metamorphicrocks,another occur granitic entrusives.Gold abundance analyses show that the background value of metamorphic rocks is 2.04×10^-9,the value of the Mesozoic monozonites is 66.07×10^-9,the other granites have low gold abundance.The dissolved experiment of different rocks show that the gold of plaiogoamphioble,monozonite and lamprophyre is easily dissolved,and provide partial ore-forming materials for gold deposits,but it is difficult to dissolve the gold of other rocks.The different rocks have the unifrom sulfar isotope composition and similar with chronide values,this indicates ore-forming materials are from abyssal resoures. Rare earth element curves of differient rocks are parallel,charactered with LREE enrichment and little Eu anomoly,this feature indicates these rocks have the similar resources.Lead isotope of the rocks(ores) plot in area between u=8.5 and u=9.58 line,this further indicate the ore-forming materials come from abyssal resoures(under crust or upper matle).

Key words: Material Resources, Gold Deposits, Jin ChengDong, Jilin Provin

中图分类号:

P612/P618.51

曾庆栋,沈远超,戴新义. 吉林省金城洞地区金矿成矿物质来源[J]. J4, 1998, 6(3): 22-29.

Zeng Qingdong，Sheng Yuanchao，Dai Xinyi. ORE-Forming MATERIAL RESOURCES OF GOLD DEPOSITS IN JIN CHENG DONG AREA JILLN PROVINCE[J]. J4, 1998, 6(3): 22-29.

参考文献

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