开鲁坳陷钱家店凹陷构造演化与铀成矿
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摘要
本文通过对钱家店地区构造及其演化的研究,较系统地阐述了各构造演化阶段对铀成矿的作用。不同的演化阶段对砂岩铀矿的形成给予了不同的贡献。其早白垩世伸展断陷阶段形成了含煤、石油、天然气的断陷层序建造,为砂岩型铀成矿作用的进行准备了充足的还原剂;晚白垩世早期热降拗陷阶段,沉积了研究区有利的成矿砂体组合;晚白垩世晚期构造反转、隆升剥蚀阶段形成的构造剥蚀天窗,构成完整的补-径-排成矿流体系统;新近纪-第四纪差异升降阶段铀矿体进一步叠加富集。
The Qianjiadian uranium deposit in the Kailu depression is one of the first large-scale in-situ leachable sandstone-type uranium deposits in Eastern China,and its origin has been one of the hot issues in academia.Based on the study of the structural features and tectonic evolution of Qianjiadian area,this paper systematically analyzed the effects of tectonic evolution stage on uranium mineralization and believed that different stages of tectonic evolution contribute to the formation of sandstone uranium deposits.Where in the Early Cretaceous extensional faulted depression stage,a coal-bearing,oil,natural gas sequences was formed,preparing an adequate reducing agent for sandstone-type uranium mineralization.In the early thermal depression stage of the the Late Cretaceous,the favorable combination of ore-forming sand-bodies in the study area was deposited.In the late stage of the Late Cretaceous,the tectonic inversion occurred,and the uplifted areas were eroded,and formed the structure of denuded sunroof,constitute a complete complementpathway-row ore-forming fluid system.During the differential elevation stage in the Neogene-Quaternary,however,the uranium ore body was further superimposed enrichment.
The Qianjiadian uranium deposit in the Kailu depression is one of the first large-scale in-situ leachable sandstone-type uranium deposits in Eastern China,and its origin has been one of the hot issues in academia.Based on the study of the structural features and tectonic evolution of Qianjiadian area,this paper systematically analyzed the effects of tectonic evolution stage on uranium mineralization and believed that different stages of tectonic evolution contribute to the formation of sandstone uranium deposits.Where in the Early Cretaceous extensional faulted depression stage,a coal-bearing,oil,natural gas sequences was formed,preparing an adequate reducing agent for sandstone-type uranium mineralization.In the early thermal depression stage of the the Late Cretaceous,the favorable combination of ore-forming sand-bodies in the study area was deposited.In the late stage of the Late Cretaceous,the tectonic inversion occurred,and the uplifted areas were eroded,and formed the structure of denuded sunroof,constitute a complete complementpathway-row ore-forming fluid system.During the differential elevation stage in the Neogene-Quaternary,however,the uranium ore body was further superimposed enrichment.
引文
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[12]郑纪伟.开鲁盆地钱家店铀矿床成矿地质条件及勘探潜力分析[J].铀矿地质,2010,26(4):193-200.
[13]夏毓亮,林锦荣,李子颖.松辽盆地钱家店凹陷砂岩型铀矿预测评价和铀成矿规律研究[J].中国核科技报告,2003(3):106-117.
[14]李宏涛,吴世祥,蔡春芳,等.开鲁盆地钱家店凹陷姚家组砂岩烃类地球化学特征及来源探讨[J].石油实验地质,2008,30(4):375-381.
[15]陈方鸿,张明瑜,林畅松.开鲁盆地钱家店凹陷含铀岩系姚家组沉积环境及其富铀意义[J].沉积与特提斯地质,2005,25(3):74-79.
[2]赵忠华,杨冰,杨福,等.松辽盆地南部白兴吐地区油气后生还原对铀成矿的作用[J].铀矿地质,2009,25(5):290-295.
[3]罗毅,马汉峰,夏毓亮,等.松辽盆地钱家店铀矿床成矿作用特征及成矿模式[J].铀矿地质,2007,23(4):193-200.
[4]夏毓亮,郑纪伟,李子颖,等.松辽盆地钱家店铀矿床成矿特征和成矿模式[J].矿床地质,2010,29(S1):154-155.
[5]宫文杰,张振强,于文斌,等.松辽盆地地浸砂岩型铀成矿铀源分析[J].世界核地质科学,2010,27(1):25-30.
[6]李胜祥.松辽盆地地质演化史与砂岩型铀矿找矿方向研究[D].北京:核工业北京地质研究院,2002.
[7]李宏涛,吴世祥,蔡春芳,等.开鲁盆地钱家店凹陷姚家组砂岩中烃类地球化学特征及来源探讨[J].石油实验地质,2008.30(4):376-381.
[8]李树青,王英民,王岩,等.构造反转期层序划分和可容纳空间的变化机制——以松辽盆地北部晚白垩世构造反转期为例[J].地质科技情报,2007,26(3):1-6.
[9]陈晓林,方锡珩,郭庆银,等.对松辽盆地钱家店凹陷铀成矿作用的重新认识[J].地质学报,2008,82(4):553-561.
[10]胡望水,张文军,冷军,等.松辽盆地构造演化及成盆动力学探讨[J].地质科学,2005,40(1):16-31.
[11]陈戴生.我国中新生代盆地砂岩型铀矿研究现状及发展方向的探讨[J].铀矿地质,1994,10(4):203-206.
[12]郑纪伟.开鲁盆地钱家店铀矿床成矿地质条件及勘探潜力分析[J].铀矿地质,2010,26(4):193-200.
[13]夏毓亮,林锦荣,李子颖.松辽盆地钱家店凹陷砂岩型铀矿预测评价和铀成矿规律研究[J].中国核科技报告,2003(3):106-117.
[14]李宏涛,吴世祥,蔡春芳,等.开鲁盆地钱家店凹陷姚家组砂岩烃类地球化学特征及来源探讨[J].石油实验地质,2008,30(4):375-381.
[15]陈方鸿,张明瑜,林畅松.开鲁盆地钱家店凹陷含铀岩系姚家组沉积环境及其富铀意义[J].沉积与特提斯地质,2005,25(3):74-79.