Trace element tectonic discrimination of granitoids:inspiration from big data analytics  

作　　者：Wan-Feng Chen Qi Zhang Jing Yang Er-Teng Wang Gao-Rui Song Shou-Tao Jiao Jie Yuan 

机构地区：[1]College of Geography and Tourism,Hunan University of Arts and Science,Changde,China [2]blnstitute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,China [3]School of Earth Sciences,Lanzhou University,Key Laboratory of Mineral Resources in Western China,Lanzhou,Gansu,China [4]Development Research Center,China Geological Survey,Beijing,China [5]Technology Innovation Center of Geological Information,MNR,Beijing,China [6]School of Resources and Environment,Xingtai University,Xingtai,Hebei,China

出　　处：《Big Earth Data》2023年第4期1094-1119,共26页地球大数据（英文）

摘　　要：The tectonic environment of granitoids has always been a concern of the academic community.The Nb vs.Y and Rb vs.Nb+Y diagrams have had a substantial impact.The present work uses more than 110,000 granitoid samples(SiO_(2)≥56%)from the globally shared database to discuss the validity and also explain why these diagrams used for discrimination between the different tectonic settings of granitoid rocks.The amount of data from the spreading center is sparse and the data are highly scattered and so,the present study focuses mainly on granites from the ocean islands and convergent margins tectonic environments.On the TAS diagram most of the ocean island data are alkaline series and trachybasalt series,and some are bimodal.In contrast,the granitoids on the convergent margin are mainly sub-alkaline.This work shows that the tectonic discrimination diagrams of granitoids remain valid,and only the boundaries need to be slightly adjusted.

关 键 词：Spreading center Ocean Island Apenninic-Maghrebides chain tectonic discrimination GRANITOIDS convergent margin 

分 类 号：P58[天文地球—岩石学]