| 辽西变质杂岩特征和变质作用的PTt轨迹 |
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| 引用本文： | 吴春林,陈树良.辽西变质杂岩特征和变质作用的PTt轨迹[J].矿产与地质,1993,7(1):49-55. |
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| 作者姓名： | 吴春林 陈树良 |
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| 作者单位： | 辽宁省地矿局区域地质调查队 大连116100
(吴春林，陈树良)，辽宁省地矿局区域地质调查队 大连116100(王来春) |
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| 摘 要： | 辽西早太古宙变质杂岩是由85%～90%长英质片麻岩(主要是英云闪长岩—花岗间长岩—花岗岩组合(简称TTG)的深成花岗杂岩)和10%～15%上壳岩(包括层状火山—沉积岩、脉岩及基性超基性侵入岩等)组成.斜长角闪岩和基性麻粒岩可与世界变质拉斑玄武岩对比.TTG岩石可能由中酸性岩浆与围岩熔融而成.麻粒岩相是中压区域高温变质作用的产物,变质作用的演化为退变质、近等压冷却(IBC)反时针型的PTt轨迹.
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| 关 键 词： | 变质作用 麻粒岩 PTt轨迹 杂岩 |
THE CHARACTERISTICS OF THE METAMORPHIC COMPLEX AND THE PTt PATH OF METAMORPHISM IN THE WEST OF LIAONING |
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| Wu Chunlin,Cen Shuliang,Wang Naichun.THE CHARACTERISTICS OF THE METAMORPHIC COMPLEX AND THE PTt PATH OF METAMORPHISM IN THE WEST OF LIAONING[J].Mineral Resources and Geology,1993,7(1):49-55. |
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| Authors: | Wu Chunlin Cen Shuliang Wang Naichun |
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| Abstract: | The early Archaeozoic metamorphic complex in the west of Liaoning consists of 85%-90% of felsic gneiss including mainly pluntonic granitic complex with quartz diorite-granodiorite-granite (TTG) assemblage,and 10%~15% of upper crust rock including layered volcanic-sedimentary rock,dike rock and basic-uitrabasic instrusives. The amphibolite and basic granulite may be comparable to the world's metamorphic tholeiite. TTG rocks may be formed through the smelting of intermediate-acidic magma with country rocks. The granulite facies were resulted from the regional high-temperature metamorphism with medium pressure. The metamorphism evolution was the retrogressive metamorphism with approximate isobaric cooling (IBC) and counter clockwise PTt path. |
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| Keywords: | Metatnorphism Granulate PTt path The west of Liaoning |
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