邯郸永年县洪山碱性岩体剥蚀程度分析  

Analysis of denudation degree in the Hongshan alkaline rock mass,Yongnian County,Hebei Province

作　　者：李随民 周正柱[2] 李樋 李玉成[3] 赵书梅[3] 韩腾飞 孙志伟 方勇勇 LI Suimin;ZHOU Zhengzhu;LI Tong;LI Yucheng;ZHAO Shumei;HAN Tengfei;SUN Zhiwei;FANG Yongyong(Hebei Geo University,Shijiazhuang,050031;The Fourth Geological Team of Hebei Provincial Bureau of Geology and Mineral Resources,Chende,Hebei,067000;The First Geological Team of Hebei Provincial Bureau of Geology and Mineral Resources,Handan,Hebei,056003;Hebei Geological Survey Institute,Shijiazhuang,050081)

机构地区：[1]河北地质大学,石家庄050031 [2]河北省地矿局第四地质大队,河北承德067000 [3]河北省地矿局第一地质大队,河北邯郸0750002 [4]河北省地质调查院,石家庄050081

出　　处：《地质学报》2020年第11期3263-3271,共9页Acta Geologica Sinica

基　　金：河北省国土资源厅项目(编号2013045650);河北省地矿局项目(编号454-0601-YBN-QEXZ)联合资助成果。

摘　　要：邯郸永年洪山碱性岩体及其周边成矿条件优越,已发现金、铜矿化点多处。研究显示金、铜矿床(点)在形成及分布上与洪山岩体有着密切的成因联系。金矿化主要分布在岩体北侧的火山凝灰岩中;铜矿化分布较广,但矿化以岩体中心区域为主。由于岩体剥蚀深度研究程度较低,位于岩体顶部或上方的铜金矿化主体部分是否已遭受风化剥蚀,区内铜金矿化深部找矿潜力如何等问题均亟需分析确定。据此,本文依据岩体"盖层"厚度恢复法、相对隆升剥蚀程度识别法、夷平面法和磷灰石裂变径迹法等综合判别洪山岩体剥蚀深度。不同剥蚀程度判别方法所得结论基本吻合,得出洪山岩体中心区域隆升剥蚀程度最大,在2km左右;岩体南北两侧剥蚀程度逐渐减小。在岩体剥蚀深度分析基础上,给出了区内铜金矿床找矿方向,认为金矿化有利找矿区域在岩体南侧火山凝灰岩分布区,岩体中心部位铜矿化找矿前景不容乐观。Many mineralized spots of gold and copper have been found in alkaline rock masses and their surroundings,demonstrating superior ore-forming geological conditions.The research shows that the formation and distribution of gold and copper deposits are closely related to the Hongshan rock mass.The gold mineralization is mainly distributed in the volcanic tuff on the north side of the rock mass,while copper mineralization is widely distributed in the central area of the rock mass.It has not been intensively studied due to high degree of erosion of rock mass.Deep prospecting potential of copper-gold mineralization is also not clear and needs to analyzed.According to the‘cover layer’thickness restoration method of the rock mass,relative uplift denudation degree identification method,planation surface method and the apatite fission track method,the conclusions of different discrimination methods is basically consistent.The results show that the denudation degree of central region of the Hongshan rock mass is the largest,about 2 km.The degree of denudation decreases gradually along both sides of the rock mass.Based on the above analysis,the prospecting strategy for the copper and gold deposits is proposed.The favorable prospecting area of gold mineralization distribute in the volcanic tuff which lies on the southern side of the rock mass.However,the copper mineralization in the central part of the rock mass is not optimistic.

关 键 词：剥蚀程度 铜金矿化 找矿方向 洪山岩体 邯郸 

分 类 号：P618.2[天文地球—矿床学]