地学前缘 ›› 2025, Vol. 32 ›› Issue (1): 244-256.DOI: 10.13745/j.esf.sf.2024.10.39

• 中亚成矿带战略资源地球化学调查评价 • 上一篇    下一篇

中蒙边界地区金地球化学分布特征及远景区预测

刘汉粮1,2,3,4(), 王学求1,3,4,*(), 聂兰仕1,3,4,*(), 迟清华1,3,4, 王玮1,2,3,4, SHOJIN Davaa5, ENKHTAIVAN Altanbagana5, 周建1,3,4, 杜禹德1,6   

  1. 1.中国地质科学院地球物理地球化学勘查研究所, 河北 廊坊 065000
    2.中国地质大学(北京)地球科学与资源学院, 北京 100083
    3.自然资源部地球化学探测重点实验室, 河北 廊坊 065000
    4.联合国教科文组织全球尺度地球化学国际研究中心, 河北 廊坊 065000
    5.蒙古地质调查中心, 蒙古 乌兰巴托 P.Box-318
    6.桂林理工大学地球科学学院, 广西 桂林 541004
  • 收稿日期:2024-08-20 修回日期:2024-10-12 出版日期:2025-01-25 发布日期:2025-01-15
  • 通信作者: *王学求(1962—),男,博士,研究员,从事勘查地球化学研究工作。E-mail: wxueqiu@mail.cgs.gov.cn;聂兰仕(1979—),男,博士,正高级工程师,从事勘查地球化学研究工作。E-mail: nlanshi@mail.cgs.gov.cn
  • 作者简介:刘汉粮(1985—),男,博士研究生,正高级工程师,从事勘查地球化学研究工作。E-mail: lhanliang@mail.cgs.gov.cn
  • 基金资助:
    中国地质调查局地质调查项目(DD20230623);中国地质科学院基本科研业务费项目(JKYZD202327);中国地质科学院基本科研业务费项目(AS2022P03)

Geochemical distribution of gold in the China-Mongolia boundary region and its implications for gold prospecting

LIU Hanliang1,2,3,4(), WANG Xueqiu1,3,4,*(), NIE Lanshi1,3,4,*(), CHI Qinghua1,3,4, WANG Wei1,2,3,4, SHOJIN Davaa5, ENKHTAIVAN Altanbagana5, ZHOU Jian1,3,4, DU Yude1,6   

  1. 1. Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China
    2. School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China
    3. Key Laboratory of Geochemical Exploration, Ministry of Natural Resources, Langfang 065000, China
    4. UNESCO International Centre on Global-scale Geochemistry, Langfang 065000, China
    5. Geological Investigation Center, Mongolia, Ulaanbaatar P.Box-318, Mongolia
    6. College of Earth Sciences, Guilin University of Technology, Guilin 541004, China
  • Received:2024-08-20 Revised:2024-10-12 Online:2025-01-25 Published:2025-01-15

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摘要：

中蒙边界地区成矿地质条件优越,是世界上重要的金属成矿省和全球3大斑岩型铜、金、钼成矿带之一,资源潜力巨大,是国内外地学研究和贵金属、三稀资源勘查的热点地区。文章依托中蒙边界1∶1 000 000地球化学填图数据,探讨了汇水域沉积物中金的地球化学参数和区域地球化学分布特征。中蒙边界地区汇水域沉积物金元素含量中位值和平均值分别为0.79×10-9和1.34×10-9;华北陆块和阿尔泰构造带金含量最高,区域浓集系数分别为1.43和1.36,是金的富集优势区。以金含量累积频率85%(1.55×10-9)、92.5%(2.22×10-9)和97.5%(4.03×10-9)划分外、中和内带,共圈定28处地球化学远景区,为该区寻找金等贵金属矿床提供了重要选区。研究填补了中蒙边界地区金地球化学空间分布的空白,为两国边境地区金等贵金属矿床对比提供基础数据。

关键词: 金, 地球化学分布, 地球化学填图, 中蒙边界地区

Abstract:

The Sino-Mongolian border area has excellent geological conditions for ore formation and is one of the world’s most important metal mineralization provinces. The area is situated on one of the three largest porphyry copper-gold-molybdenum metallogenic belts in the world with enormous resource potential—it is a hotspot for international and domestic geoscience research and exploration. Based on the 1∶1 million geochemical mapping data of the Sino-Mongolia border areas, the geochemical parameters and regional geochemical distribution of gold in the catchment sediments are discussed in this paper. The median and average gold anomaly values of the catchment sediments were 0.79×10-9 and 1.34×10-9, respectively. The North China Block and the Altay Tectonic Belt had the highest gold contents, with the regional concentration coefficients of 1.43 and 1.36, respectively, consistent with regions faverable for gold enrichment. The outer, middle and inner zones of gold geochemical anomalies were identified according to cumulative frequencies of 85% (1.55×10-9), 92.5% (2.22×10-9) and 97.5% (4.03×10-9), respectively. A total of 28 geochemical prospective areas were delineated, providing important exploration targets for gold and other precious metal deposits in this area. The paper fills the gap in the study of gold geochemical distribution, and provides important data for comparing precious metal deposits in the Sino-Mongolia border area.

Key words: gold, geochemical distribution, geochemical mapping, Sino-Mongolia border area

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