南岭岩浆岩成矿专属性及相关问题探讨  

Discussion on Metallogenic Specialization of the Magmatic Rocks and Related Issues in the Nanling Region

作　　者：王登红[1] 陈振宇[1] 黄凡[1] 王成辉[1] 赵芝[1] 陈郑辉[1] 赵正[1] 刘新星[2] 

机构地区：[1]国土资源部成矿作用与资源评价重点实验室中国地质科学院矿产资源研究所,北京100037 [2]中国地质大学北京地球科学与资源学院,北京100083

出　　处：《大地构造与成矿学》2014年第2期230-238,共9页Geotectonica et Metallogenia

基　　金：中国地质大调查项目“南岭岩浆岩成矿专属性”(编号:1212011120989)、“我国重要矿产和区域成矿规律研究”(编号:1212010633903);国家深部探测技术与实验研究专项“南岭成矿带地壳岩浆系统结构探测实验”课题(编号:SinoProbe 0301)资助

摘　　要：岩浆岩的成矿专属性是一个古老而又具有长期挑战性的科学问题,南岭地区花岗岩大面积出露,矿产资源也非常丰富,世人瞩目。本文在综述与花岗岩具有密切成因联系的矿产资源时空分布规律的基础上,指出南岭岩浆岩与金属矿产之间除了具有成分上的专属性之外,还具有空间上和时间上的专属性。其中,与基性超基性岩有关的矿产包括赣南等地的铂族元素和桂北等地的铜镍硫化物矿床,与中基性岩浆岩有关的钛铁矿和稀土矿床偶见,与酸性岩有关的矿产则以钨锡钼铋等传统优势矿产最为发育,与中酸性岩浆岩有关的铅锌铜金银等矿产也广泛分布;在空间上,南岭东段北部的花岗岩类明显富集石英脉型的钨矿,南部富集铀矿,西段明显富集锡铅锌矿,而中段则钨锡钼铋铜铅锌均发育,具有叠加的特点;在时间上,南岭岩浆岩具有多旋回成矿特点,但后来居上,以燕山期的成矿作用最为强烈。影响南岭岩浆岩成矿专属性的因素是多方面的,因此在利用成矿专属性特点指导找矿时也需要分析"找矿专属性"。Magmatic metallogenic specialization is an old and long term challenging scientific issue. Nanling region is well known for its vast granites and abundant mineral resources. In this paper, based on the summary of the spatial and temporal distribution of the mineral resources with genetic link with the granites, we point out that, besides the composition specialization between magamatism and metallic ore in the Nanling region, there are spatial and temporal specializations. Metallic ores related to mafic-ultramafic rocks include the PGE ores in the South Jiangxi and copper-nickel sulfide ores in the North Guangxi;ilmenite and REE ores related to medium-mafic rocks are rare;metallic ores related to acid rocks are mainly tungsten, tin, molybdenum, bismuth, etc. which are traditionally predominant mineral resources; lead, zinc, copper, gold, and silver ores related to medium-acid rocks are also wide distributed. In spatial aspect, granites in the north-eastern of the Nanling region are evidently rich in quartz-vein type tungsten ore, granites in the south of the Nanling region are rich in uranium ore; granites in the western of the Nanling region are evidently rich in tin, lead, zinc ore, while granites in the middle of the Nanling region are host to ungsten, tin, molybdenum, bismuth, lead, zinc and copper ore, with characteristics of superposition. In temporal aspect, magmatism in the Nanling region has the characteristics of multicycle mineralization, the later comers surpass the formers, with the mineralization most intense in the Yanshanian. The factors influencing the specialization of the magmatism in the Nanling region are various, therefore, when the mineralization specialization is used as prospecting guidance, we should also analysis the“prospecting specialization”.

关 键 词：成矿专属性 找矿专属性 南岭 岩浆岩 

分 类 号：P612[天文地球—矿床学]