| 假玻状岩研究的新进展 |
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| 引用本文： | 张桂林. 假玻状岩研究的新进展[J]. 地质科技情报, 1997, 16(2): 24-28 |
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| 作者姓名： | 张桂林 |
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| 作者单位： | 桂林工学院资源工程系 |
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| 摘 要： | 综述了假玻状岩研究的主要进展，假玻状岩形成的磨擦熔融机制与机械磨碎机制实际上不是过去所认为的是两种互相排斥的机制，而是在假玻状岩形成过程中两个密切相关的阶段，磨碎作用是熔融发生的必要的前提条件；假玻状岩不仅可以形成于脆性域（与碎裂岩相关），而且可以形成于脆韧性过渡区（与糜棱岩相关），形成的最大深度可达１８ｋｍ；假玻状岩是围岩中矿物选择性熔融的产物，矿物优先熔融的顺序（从易到难）为：层状硅酸盐、链状
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| 关 键 词： | 假玻状岩 磨擦熔融 机械磨碎脆性域 选择性熔融 |
NEW ADVANCEMENT OF STUDY ON PSEUDOTACHY LITES |
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| Zhang Guilin. NEW ADVANCEMENT OF STUDY ON PSEUDOTACHY LITES[J]. Geological Science and Technology Information, 1997, 16(2): 24-28 |
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| Authors: | Zhang Guilin |
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| Abstract: | Overview of the major advancement of study on pseudotachylites is made in the paper.Frictional melting and mechanical comminution are complementary and not mutually exclusive processes,and comminution is a necessary precursor to melting by friction.Pseudotachylites are not only generated in brittle regime (associated with cataclasites),but in brittle ductile transition area (associated with mylonites),and the maximum depth of pseudotachylite generation may reach 18 km.Pseudotachylite is the result of selective melting of minerals in host rock.The order of susceptibility to melting is as follows:phyllosilicates,inosilicates (amphiboles,pyroxenes),tectosilicates,orthosilicates.Quartz is relatively the most difficult to be melted,which contrasts the susceptibility to melting of normal igneous rocks. |
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| Keywords: | pseudotachylite frictional melting mechanical comminution brittle regime brittle ductile transition selective melting. |
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