桐柏老湾金矿带成矿构造体系演化研究及其地质意义
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摘要
通过对老湾成矿带各期构造作用、区域变质作用、岩浆作用、矿化富集作用研究,将老湾成矿带成矿构造体系演化分为三个阶段:加里东-华力西期深层次韧性剪切作用,形成的NNW向构造控矿因素深远,起初始富集作用;从印支晚期(236～214 Ma)开始,在燕山期或期前(132.5Ma)为脆-韧性剪切-右行走滑体系,矿液再次充填控矿形成现在的富矿体;燕山末期后发生了浅层次脆、韧性构造和构造推覆。并建立了老湾金矿带"早期老湾韧性剪切成矿构造系统"与"中期高角度右型走滑脆韧性断裂构造系统叠加"和"晚期构造掩盖或破坏"三期成矿构造演化体系。三期成矿构造演化体系的建立和"晚期老湾岩体推覆于龟山岩组上"的认识,极大地拓展了赋矿地层空间,为取得找矿突破提供重要理论依据。
Study on stages of tectonism,regional metamorphism,magmatism,mineralized enrichment of Laowan gold metallogenic belt divides the metallotectonic evolution into three stages:1)CaledonianVariscan deep ductile shearing stage during which the long term NWW ore-controlling structure and initial ore material enrichment were formed;2)brittle-ductile shearing-dextral strike slip stage from Late HindoChina(236～214 Ma)to Yanshanian or Pre-Yanshanian period(132.5 Ma)during which ore fluid in the system to formed the present rich ore bodies;3)Late Yanshanian stage during which secondary shallow brittle,ductile shearing and structural nappe were formed.The three stage metalognic model of the belt is built,i.e.the main ore-forming stage,the early Laowan ductile shearing stage,the middle high angle dextral strike slip stage which overprinted on the first stage and the late structural nappe which destroyed and covered the pre-existed ore bodies.The three stage model,especially the viewpoint of overthrusting of the Late Laowan intrusive body on the Guishan Formation would expand considerably the prospecting area and supply theoretical basis for prospecting breakthrough in the area.
Study on stages of tectonism,regional metamorphism,magmatism,mineralized enrichment of Laowan gold metallogenic belt divides the metallotectonic evolution into three stages:1)CaledonianVariscan deep ductile shearing stage during which the long term NWW ore-controlling structure and initial ore material enrichment were formed;2)brittle-ductile shearing-dextral strike slip stage from Late HindoChina(236～214 Ma)to Yanshanian or Pre-Yanshanian period(132.5 Ma)during which ore fluid in the system to formed the present rich ore bodies;3)Late Yanshanian stage during which secondary shallow brittle,ductile shearing and structural nappe were formed.The three stage metalognic model of the belt is built,i.e.the main ore-forming stage,the early Laowan ductile shearing stage,the middle high angle dextral strike slip stage which overprinted on the first stage and the late structural nappe which destroyed and covered the pre-existed ore bodies.The three stage model,especially the viewpoint of overthrusting of the Late Laowan intrusive body on the Guishan Formation would expand considerably the prospecting area and supply theoretical basis for prospecting breakthrough in the area.
引文
[1]谢巧勤,徐晓春,岳书仓.河南桐柏老湾金矿床氢氧氦同位素地球化学及成矿流体来源[J].地质科学,2001,36(1):36-42.
[2]张宗恒,方国松,侯海燕,等.河南桐柏老湾金矿床地质特征及成因探讨[J].黄金地质,2002,8(3):20-26.
[3]刘文灿,杜建国,张达,等.北淮阳构造带老湾金矿区构造与成矿作用的关系[J].现代地质,2003,17(1):8-13.
[4]陈良,戴立军,王铁军,等.河南省老湾金矿床地球化学特征及矿床成因[J].现代地质,2009,23(2):277-284.
[5]河南省地矿厅第三、第四调查队.河南省桐柏县老湾韧性剪切带金矿预测研究报告[R].郑州:河南省地质资料馆,1990.
[6]杨梅珍,付晶晶,王世峰,等.桐柏山老湾金矿带右行走滑断裂控矿体系构建及其意义[J].大地构造与成矿学,2014,38(1):94-107.
[7]王洪恩,任爱琴,吴宏伟,等.河南省桐柏现老湾金矿带断裂特征及控矿模式[J].华南地质与矿产,2013,29(2):139-145.
[8]河南省地矿局第一地质勘查院.河南省桐柏县老湾金矿深部及外围预查报告[R].郑州:河南省地矿局第一地质勘查院,2016.
[9]河南省地矿局第一地质勘查院.河南省桐柏县老湾金矿接替资源勘查报告[R].郑州:河南省地矿局第一地质勘查院,2016.
[10]江思宏,聂凤军,方东会,等.河南桐柏围山城地区主要侵入岩年代学与地球化学特征[J].地质学报,2009,83(7):1011-1029.
[11]刘翼飞,江思宏,方东会,等.河南桐柏老湾花岗岩体锆石SHRIMP U-Pb年龄及其地质意义[J].岩石矿物学杂志,2009,27(6):519-523.
[12]谢巧勤,徐晓春.河南桐柏老湾金矿床和花岗岩的年龄及其意义[J].高校地质学报,2000,6(4):546-553.
[13]谢巧勤,潘成荣.河南老湾金矿床流体包裹体及稀土元素地球化学研究[J].合肥工业大学学报:自然科学版,2003,26(1):47-52.
[14]潘成荣,岳书仓.河南老湾金矿床40 Ar/39 Ar定年及铅同位素研究[J].合肥工业大学学报:自然科学版,2002,25(1):9-13.
[2]张宗恒,方国松,侯海燕,等.河南桐柏老湾金矿床地质特征及成因探讨[J].黄金地质,2002,8(3):20-26.
[3]刘文灿,杜建国,张达,等.北淮阳构造带老湾金矿区构造与成矿作用的关系[J].现代地质,2003,17(1):8-13.
[4]陈良,戴立军,王铁军,等.河南省老湾金矿床地球化学特征及矿床成因[J].现代地质,2009,23(2):277-284.
[5]河南省地矿厅第三、第四调查队.河南省桐柏县老湾韧性剪切带金矿预测研究报告[R].郑州:河南省地质资料馆,1990.
[6]杨梅珍,付晶晶,王世峰,等.桐柏山老湾金矿带右行走滑断裂控矿体系构建及其意义[J].大地构造与成矿学,2014,38(1):94-107.
[7]王洪恩,任爱琴,吴宏伟,等.河南省桐柏现老湾金矿带断裂特征及控矿模式[J].华南地质与矿产,2013,29(2):139-145.
[8]河南省地矿局第一地质勘查院.河南省桐柏县老湾金矿深部及外围预查报告[R].郑州:河南省地矿局第一地质勘查院,2016.
[9]河南省地矿局第一地质勘查院.河南省桐柏县老湾金矿接替资源勘查报告[R].郑州:河南省地矿局第一地质勘查院,2016.
[10]江思宏,聂凤军,方东会,等.河南桐柏围山城地区主要侵入岩年代学与地球化学特征[J].地质学报,2009,83(7):1011-1029.
[11]刘翼飞,江思宏,方东会,等.河南桐柏老湾花岗岩体锆石SHRIMP U-Pb年龄及其地质意义[J].岩石矿物学杂志,2009,27(6):519-523.
[12]谢巧勤,徐晓春.河南桐柏老湾金矿床和花岗岩的年龄及其意义[J].高校地质学报,2000,6(4):546-553.
[13]谢巧勤,潘成荣.河南老湾金矿床流体包裹体及稀土元素地球化学研究[J].合肥工业大学学报:自然科学版,2003,26(1):47-52.
[14]潘成荣,岳书仓.河南老湾金矿床40 Ar/39 Ar定年及铅同位素研究[J].合肥工业大学学报:自然科学版,2002,25(1):9-13.
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