“宁芜玢岩铁矿研究”回顾及某些问题的深化研究——贺陈毓川先生80华诞  

A Review:“The Research of Ning-Wu Porphylite Iron Deposit”and Some Further Research Problems

作　　者：徐志刚[1] 

机构地区：[1]中国地质科学院矿产资源研究所

出　　处：《地质学报》2014年第12期2394-2412,共19页Acta Geologica Sinica

基　　金：中国地质大调查项目"中国分矿种(组)矿产地质总结研究"(编号12120114039601);"中国矿产地质与区域成矿规律综合研究(中国矿产地质志)"(编号1212011220369);全国重要矿产区域成矿规律研究(编号1212011121037)联合资助的成果

摘　　要：本文概略回顾了陈毓川先生在20世纪70年代,作为"宁芜玢岩(火山岩型)铁矿"国家项目主要负责人,对该项目的贡献;介绍了作为该项目主要成果之《宁芜玢岩铁矿》专著的内容;回顾笔者参与该项目对提高业务能力、扩展地学知识、增长专业兴趣、提出科学问题等方面所受教益,并举中国东部中生代火山岩之形成构造环境及火山成因铁矿床(特别是富铁"矿浆")成因说明之;同时,还提出与"玢岩铁矿"有关的几个有待进一步深化研究的科学问题,如1如何"定量"地测定宁芜盆地玄武安山质岩浆是在多大的氧逸度条件下发生分离结晶作用的?2为何有些次火山岩(辉长闪长玢岩)形成铁矿,而有些则未形成铁矿?其原始岩浆各自在什么样的氧逸度条件下和构造环境中发生分离结晶作用的?3中国东部中生代火山岩的岩石系列属性,特别是宁芜盆地玄武安山质岩浆能否归入"橄榄玄粗岩(shoshonite)系列"?This paper firstly preliminarily reviews ＂ The Research Program of Ning-Wu Porphylite （Volcanogenic） Iron Deposits＂ directed by Mr.Chen Yuchuan during the 1970＇s and introduces the main contents of the monograph of ＂The Ning-Wu Porphylite Iron Deposits＂; then reviews the benefit from participating in ＂The Ning-Wu Program＂,including the improvement of professional ability,enlarging of geological sciences,and interesting at volcanic rocks and proposing scientific problems,and illustrating as examples of the tectonic setting and environment of the Mesozoic volcanic rock and volcanogenic iron deposits （especially the genesis about the iron-riched ＂ore-magma＂） in eastern China.Finally,proposes some scientific problems such as ① determine quantitatively under how lower oxygen fugacity （Po2） the Ning-Wu basalt-andesitic magma fraction-crystallized the Fe-rich liquid （iron-magma）; ②why some subvolcanic rocks （gabbro-diorite/gabbro-diorite porphylite） formed iron deposits,another did not？ How did their original magmas evaluated under different oxygen fugacity and structural environment？ ③what rock series （association） do the Mesozoic volcanic rocks in eastern China belong to？ Does the volcanic rocks in Ning-Wu basin belong to the shoshonitic rock series （association）？

关 键 词：宁芜盆地 玢岩铁矿(火山岩型铁矿) 火山-侵入岩浆演化 富铁矿浆 

分 类 号：P618.31[天文地球—矿床学]