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黄金科学技术 ›› 2020, Vol. 28 ›› Issue (5): 701-711.doi: 10.11872/j.issn.1005-2518.2020.05.027

• 矿产勘查与资源评价 • 上一篇    下一篇

山东胶莱盆地东北缘前垂柳矿区金矿资源潜力分析

段留安1(),魏有峰2,陈雄军1,韩小梦1,郭云成1   

  1. 1.中国地质调查局烟台海岸带地质调查中心,山东 烟台 264004
    2.中国地质大学(武汉)数学与物理学院,湖北 武汉 430074
  • 收稿日期:2019-12-30 修回日期:2020-06-14 出版日期:2020-10-31 发布日期:2020-11-05
  • 作者简介:段留安(1976-),男,河南长葛人,博士,高级工程师,从事矿产勘查及矿床地球化学研究工作。liuanduan@163.com
  • 基金资助:
    中国地质调查局项目金多金属资源勘查工程“胶西北地区金矿资源勘查”(DD20208006)

Potential Analysis of Gold Resources in Qianchuiliu Mining Area, Northeast Margin of Jiaolai Basin,Shandong Province

Liuan DUAN1(),Youfeng WEI2,Xiongjun CHEN1,Xiaomeng HAN1,Yuncheng GUO1   

  1. 1.Yantai Geological Survey Center of Coastal Zone,China Geological Survey,Yantai 264004,Shandong,China
    2.School of Mathematics and Physics,China University of Geosciences,Wuhan 430074,Hubei,China
  • Received:2019-12-30 Revised:2020-06-14 Online:2020-10-31 Published:2020-11-05

摘要:

前垂柳矿区位于山东胶莱盆地东北缘,其南西侧为辽上金矿,南东侧为西涝口和西井口金矿床,区域成矿地质条件较好。通过对以往的地质、物探和化探等资料进行系统梳理,结合周边典型金矿床特征,提出了2种找矿思路:在矿区南西部寻找受控于NE走向断裂破碎带中的“辽上式”金矿;在矿区南东侧探讨受控于EW向大型断裂破碎带并产出于该破碎带中的金矿的可能性。分析认为该区金矿体主要赋存在断裂破碎带产状由陡变缓处,浅部矿体分散且规模小,与深部厚大矿体有较大的无矿间隔。通过对矿区物化探等地质条件进行分析,对比区域性成矿规律,以及对矿区2种找矿思路成矿可能性进行研判,认为该区有较大的找矿潜力。

关键词: 成矿规律, 资源潜力, 找矿思路, 前垂柳矿区, 胶莱盆地北东缘

Abstract:

The Qianchuiliu mining area of Muping in Yantai City is located in the northeast margin of Jiaolai Basin,Shandong Province.It shows good location and metallogenic condition with Liaoshang gold deposit (super large) on the west and Xilaokou gold deposit(large) and Xijingkou gold deposit(medium) on the east.However,there has been no breakthrough in ore prospecting in this area through geological work for many years,and the prospecting has fallen into confusion.In this paper,base on the introduction of the geological background of the Qianchuiliu mining area,we sorted out and summarized the geological,geophysical and geochemical data obtained in this area.Then based on the characteristics of the surrounding typical gold deposits and the main orebodies in each deposit,we summarized the gold metallogenic regularity and the metallogenic characteristics in this area.According to above studies,the reasons why the prospecting effect is not obvious in this area in the past are found and discussed.It is considered that there are some problems,including the selection of geophysical methods,excessive engineering spacing,too much attention to the industrial grade of surface samples,and lack of systematic understanding of mineralization.Furthermore,two possible prospecting ideas were proposed:Firstly,it is considered that the four gold mining areas,e.g.,Liaoshang,Qianchuiliu,Xilaokou and Xijingkou are controlled by the same NE-trending large fault zone from west to east,the inclination angle gradually changed from steep to gradual;Secondly,the above four mining areas are controlled by a large fault zone in the east-west direction,the inclination angle gradually changed from steep to gentle from north to south.Gold orebodies exists in the large fracture zone,the shallow orebody is characterized by steep dip,scattered and small scale.Whereas,the deep orebody mainly exists in the fault fracture zone from steep to slow,distinguished by large scale and stability.Notably,there is a large ore-free interval between shallow and deep ore bodies.Further analysis shows that in the Qianchuiliu mining area between Liaoshang and Xilaokou,although there are no industrial orebodies on the surface or shallow surface,a large-scale fracture zone has been found,which should be brought into the same metallogenic system as the surrounding gold deposits.No matter which model controls the ore deposits,in NE or near EW direction,it is inferred that there are a series of gold orebodies in Qianchuiliu mining area,which are relatively gently dipping and inclined to SE or S,and exist in the place from steep to gentle in the fracture zone.Therefore,the gold resource potential is between the Liaoshang and Xilaokou gold deposit,and it is concluded that there is a great prospecting potential.

Key words: metallogenic regularity, resource potential, prospecting idea, Qianchuiliu mining area, northeast margin of Jiaolai Basin

中图分类号: 

  • P618.51

图1

前垂柳及周边金矿区地质简图1.第四系;2.白垩纪地层;3.荆山群;4.玲珑型花岗岩;5.矿脉及编号;6.见矿/不见矿/设计钻孔及编号;7.金矿床;8.激电异常及编号;9.矿区名称及范围;10.研究区"

表1

前垂柳矿区化探综合异常[15]"

异常编号异常名称异常特征组合所在位置
主元素其他元素
Ht-1上垛玉夼WPb-Cu-Zn-Au-As-Mo-Bi上垛玉夼村东南1 km处
Ht-2前垂柳AuAg-Zn-Pb-Cu-As-Bi-Mo-W-Sb前垂柳村东北200 m处
Ht-3辽上水库北AuAg-Zn-As-Pb-Cu-W-Mo-Bi辽上水库北100 m处
Ht-4辽上水库东AuAs-Ag-Cu-W-Bi-Mo-Sb辽上水库东100 m处
Ht-5垂柳南PbAg-Zn-Au-As-W-Mo-Bi-Sb前垂柳村南1.2 km处
Ht-6凤凰崖北AuAg-Zn-Pb-Cu-W-As-Bi-Mo-Sb西凤凰崖村北1.7 km处

图2

前垂柳矿区Ht-3综合地球化学异常图"

图3

前垂柳矿区Ht-4综合地球化学异常图"

表2

前垂柳矿区周边地区金矿床特征"

矿区名称矿体情况矿床规模平均品位赋存标高
辽上7个矿化蚀变带,56个金矿体,其中主次要矿体各5个金69 003 kg;伴生银5 437 kg;伴生硫纯硫量84.47×104 t

金:3.33×10-6;银:2.64×10-6

硫:4.10%

-518~-952 m
西涝口168个矿体,其中Ⅲ-26为主矿体金31 094 kg;伴生银3 957 kg;纯硫量604 973 t金:2.53×10-6
西井口19个金矿体、6个铅矿体、6个锌矿体金11 004 kg;共生铅304 t,共生锌621 t;伴生银19 393 kg;纯硫量460 862 t金:2.73×10-6;铅:0.73%;锌:1.37%;银:5.62×10-6;硫:12.15%-127~-634 m
沙旺—土堆215个矿体累计探明金大于20 000 kg;伴生纯硫量231 636 t金:4.72×10-6;硫:4.31%

图4

辽上金矿Ⅲ矿体剖面线示意图(据文献[7]修改)1.钻孔及编号;2.矿化带及编号;3.矿体及编号"

图5

前垂柳矿区设计钻孔勘探线剖面示意图1.变粒岩;2.大理岩;3.碎裂岩;4.二长花岗岩;5.金矿体及编号;6.设计钻孔及编号;7.已施工钻孔及编号;8.金品位(×10-6)/水平厚度(m)"

图6

西涝口矿区18号脉勘探线剖面示意图1.大理岩;2.二长花岗岩;3.变粒岩;4.碎裂岩;5.煌斑岩;6.金矿体及编号;7.钻孔及编号;8.金品位(×10-6)/水平厚度(真厚度)(m)"

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