Sr/Y和La/Yb:定量评估斑岩铜矿床含矿岩浆形成深度的有效参数  

Sr/Y and La/Yb:Parameters of Quantitative Assess Depth of ore-bearing magma of Porphyry Copper Deposits

作　　者：曹倩 姜子琦 CAO Qian;JIANG Zi-Qi(School of Earth Sciences,Guilin University of Technology,Guilin 541004,China;Hidden Metal Exploration Key Laboratory of Guangxi,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学地球科学学院,广西桂林541004 [2]桂林理工大学广西隐伏金属矿产勘查重点实验室,广西桂林541004

出　　处：《世界有色金属》2024年第1期94-96,共3页World Nonferrous Metals

摘　　要：斑岩铜矿的形成与含矿岩浆的起源深度或者地壳厚度有着密切的联系,数字重建地质历史时期俯冲带岩浆弧地壳厚度变化,对建立斑岩铜矿的成矿理论具有重要的启示意义。先前的研究表明现代岛弧火山岩的一些全岩地球化学参数(Sr/Y,La/Yb)与地壳厚度之间存在显著的关联,并且在大量数据统计分析基础上建立了可信的拟合函数模型。本文详细描述了这些参数与地壳厚度的关联,并讨论了该参数在重建地质历史时期俯冲型造山带地壳厚度的优势。The formation of porphyry copper deposits is closely related to the origin depth or crustal thickness of ore bearing magma.Digital reconstruction of the crustal thickness changes in subduction zone magmatic arcs during geological history has important implications for establishing the ore-forming theory of porphyry copper deposits.Previous studies have shown a significant correlation between some whole rock geochemical parameters(Sr/Y,La/Yb)of modern island arc volcanic rocks and crustal thickness,and reliable fitting function models have been established based on a large amount of data statistical analysis.This article provides a detailed description of the correlation between these parameters and crustal thickness,and discusses the advantages of this parameter in reconstructing the crustal thickness of subduction type orogenic belts during geological history.

关 键 词：大数据 地球化学参数 斑岩铜矿 地壳厚度 

分 类 号：P618.41[天文地球—矿床学]