牡丹江地区黑龙江杂岩的变质变形特征  

The Metamorphic and Deformed Characteristics of the Heilongjiang Melange in Mudanjiang Area

作　　者：王跃[1,2] 张兴洲[2] 宋海峰[3] 张春艳[2] 熊小松[1] 

机构地区：[1]中国地质科学院地质研究所,北京100037 [2]吉林大学地球科学学院,长春130061 [3]长春工程学院,勘查与测绘工程学院,长春130021

出　　处：《吉林大学学报（地球科学版）》2009年第6期1066-1072,共7页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金重点项目(40739905)

摘　　要：黑龙江牡丹江地区出露一套具有洋壳性质的构造混杂岩,根据特征矿物组合及岩相学特点,将这套杂岩自北向南划分为3个变质变形相带：蓝片岩带、黑硬绿泥石带和黑云母带,带与带之间被强烈的韧性变形带所分隔,表明彼此间为构造接触,而非连续的变质相带,说明了牡丹江地区的黑龙江杂岩不是正常的变质地层单元。3个相带的出露与自北向南的逆冲推覆事件有关。根据黑龙江杂岩变质变形特征和其年代学资料,将本区构造演化划分为3个阶段：（1）305～296 Ma之前的陆间洋洋壳俯冲及闭合阶段;（2）170.26～154 Ma佳木斯和兴凯地块之间的陆陆碰撞和后期作为整体统一受西太平洋构造域影响的阶段;（3）154 Ma之后敦密断裂左行走滑并对黑龙江杂岩进行改造的阶段。There is a set of structural melange of oceanic features in Mudanjiang area, Heilongjiang Province. Based on its mineral assemblage and petrographical characters, the melange is divided into three metamorphic and deformed belts, namely, the blueschist, stilpnomelane and biotite belts in turn. The existence of the two intense ductile belts separating the three belts shows they are not successive metamorphic belts hut structural belts. Hence, the Heilongjiang melange of the Mudanjiang area does not belong to the normal metamorphic strata of the strictly stratigraphic meaning. The three belts are related to the thrusting from the north to the south. Based on present research and known chronological data, the structural evolution in the area can be divided into three stages： （1）before 305-296 Ma, a stage of subduction of intercontinental oceanic crust and closure of intercontinental ocean between the Jiamusi terrain and the Xingkai terrain; （2）170.26 - 154 Ma, a stage of collision between the Jiamusi terrain and Xingkai terrain and of an integrated continent affected by western pacific plate; （3）after 154 Ma, a stage of sinistral strike-slip and of its reworking of the Dunmi fault on Heilongjiang melange.

关 键 词：蓝片岩 变质变形相带 黑龙江杂岩 佳木斯地块 兴凯地块 地球年代学 

分 类 号：P588.3[天文地球—岩石学]