构造应力场转换与界面成矿
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引用本文:邓军,吕古贤,杨立强,郭涛,方云,舒斌.1998.构造应力场转换与界面成矿[J].地球学报,19(3):244-250.
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作者单位
邓军 中国地质大学北京 
吕古贤 地质力学研究所 
杨立强 中国地质大学北京 
郭涛 地质力学研究所 
方云 中国地质大学武汉 
舒斌 中国地质大学武汉 
基金项目:国家计委国土司科技找矿项目,国家科技攀登项目,地矿部“九五”重点基础项目
中文摘要:构造应力场转换与界面成矿是成矿作用动力学的关键和核心,它决定着矿床的形成与分布。构造应力场转换表现为不同层次的构造叠加作用和韧-脆性变形的转换,以及同一构造层次不同时期、不同构造部位应力的转换。成矿界面是物理化学条件突变的空间和场所,是成矿流体停积而发生矿质沉淀、富集、成矿之所在,主要表现为岩性、温度、压力、pH、Eh等方面的突变性,其力学性质及岩石的物理性质、化学成分是控制矿体形态、产状、规模,矿石组构,甚至矿石成分的重要因素。它们与构造应力作用大多有相关性,而与构造-流体的脉动性及空间分布关系尤为密切。作者在矿石构造多呈张裂状态,而矿脉、矿体及蚀变带多表现为压剪变形性质的地区详细填图成果基础上,探讨了构造-流体脉动规律与界面成矿机制,提出剪压变形构造岩相向剪张变形构造岩相转换而发生金属硫化物成矿作用的新认识。
中文关键词:构造物理化学场  构造变形岩相  构造应力场转换  构造-流体脉动  界面成矿
 
The Transformation of Tectonic Stress Field and Interfacial Metallogensis
Abstract:The transformation of stress field and interfacial metallogensis is the key and core of dynamics of metallization.Espically,it determines forming and distribution of ore deposits.It displays tectonic overprinting and transformation of dultile brittle among different tectonic levels,and more importantly,in the same tectonic level,it displays stress transformation among different periods and positions. Oreforming interfaces are the space and places of sudden change of physicochemicity condition,and the spots of precipitating,accumulating and metallizating.They display salation of lithology, t,p ,pH, E h,and so on.Its mechanic characters and rocks physical,chemical characters are important facters that control the shape,attitude,scale and ore fabric,even ore component,which has relationship with the tectonic stress,especially with tectonic fluid motion by stages.The transformation of stress field leads to textural variance of tectonic physicochemicity field and forms different interfaces. On the condition,all kinds of alteration and metallization can emerge. Based on results of detailed mapping of tectonic deformation lithofacies, the authors found the structure of ore vein,ore body and alteration belts mainly show strain shear deformation,and ore structure is mainly tension fissure, then the paper discusses the law of tectonic fluid motion by stages and interfacial metallogenism. At the end of the paper,authors put forward a new thought that metallogensis of metallic sulphide occurred on the interface which shear-strain deformed structural lithofacies transformed to shear tension deformed structural lithofacies.
keywords:tectonic physicochemicity field  tectonic deformation  lithofacies transformation of tectonic stress field  structure fluid motion by stages  interfacial metallogensis
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