| 辽宁大石桥─海城地区辽河群变泥质岩石的变质变形序列的研究 |
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| 引用本文： | 陈曼云,黄志安.辽宁大石桥─海城地区辽河群变泥质岩石的变质变形序列的研究[J].国土资源,1994(Z1). |
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| 作者姓名： | 陈曼云 黄志安 |
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| 作者单位： | 长春地质学院地球科学系，辽宁地质矿产局区域地质调查队 |
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| 摘 要： | 大石桥－海城地区辽河群的变泥质岩石是主要的变质岩类之一，它们经受了三期构造变形。第一期构造变形形成的叶理（Ｓ＿１）在变质岩中分布很广；第二期构造变形形成的折劈理（Ｓ＿２）主要发育在变泥质岩石中，但折劈理的强度在整个地区中有差异；第三期构造变形是以局部发育的膝折带为标志。变泥质岩石中矿物成分繁多，主要的常见矿物有绢云母、白云母、黑云母、绿泥石、石榴石、十字石、石英、硅线石和长石，偶见有蓝晶石、红柱石、堇青石、硬绿泥石和刚玉。据野外观察和研究，十字石、蓝晶石沿岩层走向延伸，显示了原岩成分控制了它们的形成。变泥质岩石的矿物之间、变质作用和变形作用之间的关系十分复杂，它们为本区变质作用演化历史和变质变形序列的研究提供了十分重要的证据。
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| 关 键 词： | 变泥质岩石，叶理，折劈理，包体痕迹，变质变形序列 |
THE STUDY ON THE SEQUENCE OF METAMORPHISM AND DEFORMATION IN METAPELITES FROM LIAOHE GR0UP IN DASHIQIAO-HAICHENG AREA,LIAONING PROVINCE |
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| Chen Manyun.THE STUDY ON THE SEQUENCE OF METAMORPHISM AND DEFORMATION IN METAPELITES FROM LIAOHE GR0UP IN DASHIQIAO-HAICHENG AREA,LIAONING PROVINCE[J].Land & Resources,1994(Z1). |
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| Authors: | Chen Manyun |
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| Abstract: | Metapelites from Liaohe Group are one of the main types of metamorphic rock inDashiqiao-Haicheng area,which have been underwent three phases of deformation,The fo-liation(S_1)of metamorphic rocks widely scattered in the first phase of deformation.In thesecond phase of deformation,crenulation cleavage(S_2)mainly occurred in metapelites,which the degree of deformation is various within the entire area. The third phase of defor-mation is marked by the locally developed kinked zone. There are various minerals in metapelites. The main minerals are sericite,muscovite,biotite,chlorite,garnet,staurolite,quartz,silliminate and feldspar,but kynite,andalusite,cordierite, chloritoid and corundum can be found only by accident.Judged from the field ob-serving and surveying,the extension of kynite and staurolite distributed along the strike ofstrata indicates that the composition of the original rocks is the main controlling factor intheir formation. The relations among metamorphic minerals,and between the metamor-phism and deformation of the metapelites are very complex and important evidences forstudying the evolution of metamorphic history and sequence of metamorphism and deforma-tion in the area. |
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| Keywords: | Metapelite Foliation Crenulation cleavage Inclusion trails Sequenceof metamorphism and deformation |
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