中国满洲里－绥芬河地学断面地球化学研究

中国满洲里－绥芬河地学断面地球化学研究李双林，迟效国，尹冰川，戚长谋（中国科学院地球化学研究所贵阳５５０００２）（长春地质学院．长春１３００６１）关键词地学断面，地球化学分区，地球计学分带，构造演化地学断面的地球化学研究的目的是为了查明断面域地壳一上...

Geochemical Studies on Manzhouli-Suifenhe Global Geoscience Transect

Based on the analysis of chemical composition and tectonic background of different rocks,and associated with regional mineralization,the geochemical divisions at differenttime area,base geochemical regions at precambrican era and tectonic geochemical regions atplaeozoic era are established. According to the models of crust-upper mantle structure, rockcomposition and average chemical compositions in various rock types, we estimate chemicalcompositions in every layer, and build vertical geochemical zones. The vertical geochemicalzones suggest that granitic magmatism is the main mechanism for the adjustment of verticalchemical compositions in Xing' an and Songnen blocks,but structure nappe is the main mechanism in Jiamusi block. Geochemical surface and structural geochemical layers are pointde outthrough the study of chemical compositions for different strata. Tectonic evolution model isreconstructed through analysis of tectonic settings at the different structural geochemical layers in transect province.