| 辽吉古裂谷地质演化与成矿 |
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| 引用本文： | 翟安民,沈保丰,杨春亮,胡小蝶,曹秀兰,宫晓华.辽吉古裂谷地质演化与成矿[J].地质调查与研究,2005,28(4):213-220. |
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| 作者姓名： | 翟安民 沈保丰 杨春亮 胡小蝶 曹秀兰 宫晓华 |
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| 作者单位： | 天津地质矿产研究所,天津,300170 |
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| 基金项目： | 地质大调查综合研究项目中国成矿体系与区域成矿评价（K1.4-3-1） |
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| 摘 要： | 华北太古宙大陆内2．3Ga开始裂解的辽吉古元古代裂谷，于2．2～1．7Ga期间完成拉伸裂陷、沉积堆积、底辟侵入、挤压褶皱、隆升拆离、逐渐消亡的全部演化过程。辽吉古裂谷的矿产丰富，其成矿作用与裂谷的地质演化紧密相关。裂谷拉张裂陷堆积阶段为成矿作用提供了成矿物源，在不同的古构造和古地理环境下形成不同的含矿建造（矿源层）；裂谷构造体制转换的挤压造山阶段，在变质、变形、岩浆活动等构造热事件影响下，由不同矿源的物质基础或在不同的成矿就位场所，形成不同成因的矿床类型组合；在非造山岩浆活动阶段，岩浆和热液的作用可使某些矿床进一步富集。在裂谷演化结束稳定之后，由于中生代的濒西太平洋构造带横跨辽吉古裂谷，印支-燕山期的构造岩浆活动对裂谷的成矿作用不可忽视，古元古代的含矿建造或已形成的矿床都有不同程度的印支一燕山构造岩浆活动热事件的叠加改造。此外，印支-燕山构造岩浆活动也在早期成矿物质的基础上新生成一些金（银）矿床。
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| 关 键 词： | 古元古代 辽吉古裂谷 地质演化 成矿作用 |
| 文章编号： | 1672-4135(2005)04-213-08 |
| 收稿时间： | 2005-11-15 |
| 修稿时间： | 2005年11月15 |
Geological Evolvement and Ore-Forming of the Liaoning-Jilin Paleoproterozoic Rift |
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| ZHAI An-min,SHEN Bao-feng,YANG Chun-liang,HU Xiao-die,CAO Xiu-lan,GONG Xiao-hua.Geological Evolvement and Ore-Forming of the Liaoning-Jilin Paleoproterozoic Rift[J].Geological Survey and Research,2005,28(4):213-220. |
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| Authors: | ZHAI An-min SHEN Bao-feng YANG Chun-liang HU Xiao-die CAO Xiu-lan GONG Xiao-hua |
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| Institution: | Tianjin Institute of Geology and Mineral Resources, Tianjin 300170 |
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| Abstract: | The Archean North China Craton began to split at ~ 2.3 Ga and shaped an intra-craton rift,named Liaoning-Jilin Paleoproterozoic rift.In a span of 2.2 - 1.7 Ga,this paleo-rift experienced such complicated growth history as stretching sink,volcano-sediment accumulation,diapir intrusion,buckle folding,uplift detachment till extinction.Liaoning-Jilin rift is rich in mineral resources that has closevy relation to the evolvement process.In the stage of stretching sink,abundance of volcano-sediment materials accumulated first as the source of the ores and formed different mineralizing formations(ore-source beds) in distinct tectonic and geographical setting.And then a series of ore emplacements occurred to form different types of ore deposits with various genesis under thermo-tectonic events of metamorphism,deformation and magmatism etc.The next ore-forming process was the mineral concen by hydro-thermal fluids in non-orogenic magma activity.During the Mesozoic,the Liaoning-Jilin palaeo-rift was in the structural belt on the brink of the western Pacific Ocean and influenced by the thermal event from the Indosinian - Yanshanian tectonic-magma activity,which increased the ore-forming and ore-concentration in the rift.Actually the Paleoproterozoic ore-forming formations or deposits in the rift were mostly overprinted or reconstructed by the Indosinian-Yanshanian thermo-tectonic event.Some gold(silver) deposits in the rift may be inseparable with the Indosinian-Yanshanian thermal-tectonic event. |
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| Keywords: | Paleoproterozoic Liao - Jilin Paleoproterozoicrift geological evolvement mineralizing process |
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