rock's classification
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ICS 73. 010
D 10
i7旨中华人民共和国国家标准
GB/T 17412.3-1998
岩 石分 类 和命名方案
变质岩岩石的分类和命名方案
Classification and Nomenclature Schemes of The Rocks
Classification and Nomenclature Schemes of metamorphic Rock
1998一06一17发布1999一01一01实施
国家质量技术监督局发布
Gs/T 17412.3-1998
目次
前言·.......................................................................................................................皿
1 范围·······················································································。。····················??1
2 术语定义·····························································································。·····。····一1
3 符号和缩略语················‘··············································································。·····一2
4 变质岩分类和命名的一般原则·................................................................................... 2
5 变质岩的分类·································································································??3
6 轻微变质岩类·······························································································??3
7 板岩类·................................................................................................................ 4
8 千枚岩类················。············。···········································································??4
9 片岩类············································································································??6
10 片麻岩类·············································································,···························??7
11 变粒岩类·............................................................................................................. 8
12 石英岩类·........................................................................................................·一9
13 角闪岩类·........................................................................................................... 10
工4 麻粒岩类............................................................................................................n
15 榴辉岩类........................................................................................................... 12
16 铁英岩类···················································································,···············??12
17 磷灰石岩类(变质磷块岩类)·········“···································································??12
18 大理岩类·........................................................................................................... 13
19 钙硅酸盐岩类·,····························································································??14
20 碎裂岩类········································································。···························??15
21 糜棱岩类,.···································································································??16
22 角岩类······················································”···”·“··························,.············??16
23 矽卡岩类·····,······················,···················”······”····“················。··················。··?17
24 气一液蚀变岩类.................................................................................................·一18
25 混合岩类···································································································??加
GB/T 17412.3-1998
前言
本标 准 由 中华人民共和国地质矿产部提出并归口。
本 标 准 起草单位:地质矿产部沈阳综合岩矿测试中心、地质矿产部成都综合岩矿测试中心、地质矿
产部广东中心实验室。
本 标准 主 要起草人:种瑞元、汪美凤、杨柳、秦炳生。
中华人民共和国国家标准
岩石 分 类 和命名方案
变质岩岩石的分类和命名方案
cs/T 17412. 3一1998Cl as si fication and NomenclatureS chemeso fT heR ocks
Classification and Nomenclature Schemes of metamorphic Rock
1 范围
本 标 准 规定了变质岩的分类依据和原则,制定了变质岩岩石分类和命名方案。
本标 准 适 用于地质勘查中的变质岩岩石鉴定,也适用于地质教学和科学研究工作。
2 术语定义
本 标 准 采用下列定义。
2.1 变质作用metamorphism
地 壳 中 原来已存在的岩石,由于受到构造运动,岩浆活动或地壳内热流变化等内力的影响以及陨石
冲击的瞬时热动力作用等.使岩石在固态(或基本保持固态)情况下发生矿物成分、结构、构造甚至化学
成分的变化,这些变化总称为变质作用。根据变质作用的主要因素和地质条件,可将变质作用分为区域
变质作用、动力变质作用、接触变质作用、气一液变质作用、混合岩化作用等。
2.2 变质岩metamorphic rock
在 变 质 作用条件下,使地壳中已经存在的岩石(可以是火成岩、沉积岩及早已形成的变质岩)变成具
有新的矿物组合及结构、构造等特征的岩石,称为变质岩。
2.3 特征变质矿物characteristic metamorphic mineral
指变 质 作 用过程中形成的稳定范围较窄,能够指示特定的温度、压力条件(有时还可指示原岩成分)
的变质矿物。例如:云母片岩中出现十字石或蓝晶石,表明其是由粘土质岩石经中级区域变质作用所形
成,所以十字石、蓝晶石称为特征变质矿物。
2.4 变余结构、构造palimpsest texture and structure
指变 质 岩 中,由于变质结晶作用不彻底,仍保留有原岩的结构和构造。例如:变余辉绿结构,变余砂
状结构,变余层理构造等。
2.5 变晶结构crystalloblastic texture
变 晶 结 构是原有岩石经变质作用在固态下重结晶形成的晶质结构,是指岩石中矿物变晶粒度的相
对大小、自形程度,矿物变晶的形态以及被此间的交生关系等特征。例如:等粒变晶结构,鳞片粒状变晶
结构,包含变晶结构等。
变 晶 结 构按矿物粒度大小划分为:
粗粒 变 晶 结构)3m m
中 粒 变 晶结构<3^-1m m
细 粒 变 晶结构<1-0.1 m m
显微 变 晶 结构<。.1m m
国家质1技术监督局1998一06一17批准1999-01一01实施
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