沉积建造在辽东半岛古元古代杨木杆硼矿富集成矿过程中的重要作用

P611%P619.2; 为深入了解辽东半岛古元古代硼矿富集成矿过程中沉积建造的作用,选取辽东宽甸地区杨木杆硼矿开展系列野外考察、室内显微观察与同位素特征研究.该矿床硼矿体产出在辽河岩群里尔峪组和高家峪组内,是胶辽吉造山带内典型的硼镁石型矿床.对不同种类、不同品位矿石进行详细研究,发现变余结构与交代结构是主要的矿石结构特征,反映了明显的后期成矿热液交代过程.不同类型矿石和矿区围岩硫同位素测试显示,硼矿床的矿石δ34S值为14.2‰～19.5％0,平均值为17.7‰,黑云变粒岩和电气变粒岩δ34 S值为12.0‰～13.3‰,平均值为12.7‰,蛇纹石化大理岩和蛇纹岩δ34S值为15.6‰～23...

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Published in地球科学与环境学报 Vol. 44; no. 2; pp. 207 - 219
Main Authors 赵岩, 张朋, 毕中伟, 寇林林, 杨宏智, 陈江
Format Journal Article
LanguageChinese
Published 中国地质调查局沈阳地质调查中心,辽宁沈阳 110034 01.03.2022
Subjects
沉积建造
古元古代
硫同位素
胶辽吉造山带
里尔峪组
硼同位素
硼矿
演化模型
Online AccessGet full text
ISSN1672-6561
DOI10.19814/j.jese.2021.12056

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Abstract P611%P619.2; 为深入了解辽东半岛古元古代硼矿富集成矿过程中沉积建造的作用,选取辽东宽甸地区杨木杆硼矿开展系列野外考察、室内显微观察与同位素特征研究.该矿床硼矿体产出在辽河岩群里尔峪组和高家峪组内,是胶辽吉造山带内典型的硼镁石型矿床.对不同种类、不同品位矿石进行详细研究,发现变余结构与交代结构是主要的矿石结构特征,反映了明显的后期成矿热液交代过程.不同类型矿石和矿区围岩硫同位素测试显示,硼矿床的矿石δ34S值为14.2‰～19.5％0,平均值为17.7‰,黑云变粒岩和电气变粒岩δ34 S值为12.0‰～13.3‰,平均值为12.7‰,蛇纹石化大理岩和蛇纹岩δ34S值为15.6‰～23.1‰,平均值为19.3％0.硫同位素研究结果表明S有来自于辽河群沉积建造和火山建造的特征,结合前人硼同位素研究结果,认为沉积建造在硼矿就位过程中起到了重要作用.虽然硼矿的产出与胶辽吉古元古代造山带的演化密切相关,但活泼的B元素在多种地质过程中均可能活化和重新分布,难以单纯从硼矿的产出来限定胶辽吉造山带早期演化模型.
AbstractList P611%P619.2; 为深入了解辽东半岛古元古代硼矿富集成矿过程中沉积建造的作用,选取辽东宽甸地区杨木杆硼矿开展系列野外考察、室内显微观察与同位素特征研究.该矿床硼矿体产出在辽河岩群里尔峪组和高家峪组内,是胶辽吉造山带内典型的硼镁石型矿床.对不同种类、不同品位矿石进行详细研究,发现变余结构与交代结构是主要的矿石结构特征,反映了明显的后期成矿热液交代过程.不同类型矿石和矿区围岩硫同位素测试显示,硼矿床的矿石δ34S值为14.2‰～19.5％0,平均值为17.7‰,黑云变粒岩和电气变粒岩δ34 S值为12.0‰～13.3‰,平均值为12.7‰,蛇纹石化大理岩和蛇纹岩δ34S值为15.6‰～23.1‰,平均值为19.3％0.硫同位素研究结果表明S有来自于辽河群沉积建造和火山建造的特征,结合前人硼同位素研究结果,认为沉积建造在硼矿就位过程中起到了重要作用.虽然硼矿的产出与胶辽吉古元古代造山带的演化密切相关,但活泼的B元素在多种地质过程中均可能活化和重新分布,难以单纯从硼矿的产出来限定胶辽吉造山带早期演化模型.
Author 张朋
毕中伟
寇林林
杨宏智
赵岩
陈江
AuthorAffiliation 中国地质调查局沈阳地质调查中心,辽宁沈阳 110034
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ZHAO Yan
KOU Lin-lin
ZHANG Peng
CHEN Jiang
YANG Hong-zhi
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Keywords 沉积建造
古元古代
硫同位素
胶辽吉造山带
里尔峪组
硼同位素
硼矿
演化模型
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Title 沉积建造在辽东半岛古元古代杨木杆硼矿富集成矿过程中的重要作用
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