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青海省玛多县莫格尔雪金锑矿区地球化学特征及找矿潜力分析

  • 作者:
  • 冶建虎|马吉雄|郭海明|田滔|刘飞

  • 作者单位:
  • 青海省第五地质勘查院|青海省第五地质勘查院|青海省第五地质勘查院|青海省第五地质勘查院|青海省第五地质勘查院|
  • 基金项目:

  • 青海省地勘基金项目(20231100005kc0005)
  • 详细信息:

  • 作者简介:
  • 冶建虎(1987—),男,工程师,从事矿产勘查工作;E‑mail:273724941@qq. com
  • 通讯作者:
  • 马吉雄(1986—),男,高级工程师,从事矿产勘查工作;E‑mail:823777908@qq. com
  • PDF下载

Geochemical characteristics and prospecting potential of the Mogeerxue Au-Sb mining district, Maduo County, Qinghai Province

  • English Author:
  • Ye Jianhu, Ma Jixiong, Guo Haiming, Tian Tao, Liu Fei

  • Unit:
  • (The Fifth Qinghai Geological Exploration Institute)
  • 摘要
  • 在线预览
  • 参考文献

摘要:

莫格尔雪金锑矿床大地构造位置位于鲸鱼湖—阿尼玛卿晚古生代—早中生代缝合带。矿区内圈定1处1∶5万水系沉积物异常、4处1∶1万土壤综合异常,异常组合元素以Au、Sb为主,异常中心明显,Au、Sb峰值众多,Au最大值为 712.00×10-9、Sb最大值为 71.0×10-6,异常空间展布严格受断裂控制。通过初步异常查证,圈出 2条矿带,6条矿体,矿体长 60~100 m,厚 0.86~2.80 m,金品位1.33×10-6~6.37×10-6,锑品位1.34 %~14.37 %,矿化蚀变主要为绢云母化、硅化、黄铁矿化、辉锑矿化。综合分析认为,构造是成矿有利通道和富集场所,已发现矿体均产于近东西向断裂中,成矿与近东西向断裂(F2、F3)有直接关系。矿带内有后期黄铁矿化、辉锑矿化闪长玢岩脉侵入,矿体底板为辉长岩,二者为矿体的形成提供热动力能源。顶板为硅质板岩,致密坚硬,是良好的封闭屏障,为 Au、Sb等元素的活化、迁移、富集成矿创造了良好的条件。地球化学异常重现性高,成矿元素Au、Sb峰值众多,成矿条件极为有利,可将构造蚀变岩型金锑矿作为下步主攻找矿方向,以实现找矿突破。  

关键词:

莫格尔雪;金锑矿床;地球化学特征;矿体;断裂;成矿地质条件;构造蚀变岩型;矿带

Abstract:

The geotectonic location of the Mogeerxue Au-Sb Deposit is within the Late Paleozoic-Early Mesozoic suture zone of the Jingyu Lake-Animaqing tectonic belt. In the study area, one 1:50 000 stream sediment survey anomaly and four 1:10 000 soil geochemical survey anomalies have been delineated, with Au and Sb as the primary anomalous elements. The anomaly center is significant, with numerous Au and Sb peak values, reaching a maximum of 712.00x10-9 for Au and 71.0x10-6 for Sb. The spatial distribution of anomalies is strictly controlled by fault structures. Preliminary anomaly verification has identified 2 ore belts and 6 orebodies, with orebody lengths of 60-100 m and thicknesses of 0.86-2.80 m. Au grades range from 1.33x10-6 to 6.37x10-6, while Sb grades range from 1.34 % to 14.37 %. Minera-lization and alteration  are characterized by sericitization, silicification, pyritization, and stibnite mineralization. Compre-hensive analysis suggests that fault structures serve as favorable mineralization pathways and enrichment sites, with all identified orebodies occurring within near EW-trending faults, specifically F, and F, near EW-trending faults, which are directly related to mineralization. The mineralized belts contain late-stage pyritized and stibnite-mineralized diorite porphyry dikes, while the orebody floor consists of gabbro, providing thermodynamic energy for mineralization. The roof comprises siliceous slate, which is dense and hard, acting as an effective sealing barrier that facilitates the activation, migration, and enrichment of Au and Sb. The geochemical anomalies exhibit high reproducibility, with numerous Au and Sb peaks, indicating highly favorable metallogenic conditions. Future prospecting should focus on tectonic alteration type Au-Sb mineralization to achieve a breakthrough in exploration.


Keywords:

Mogeerxue; Au-Sb deposit; geochemical characteristics; orebody; fault; metallogenic geological conditions; tectonic alteration rock type; ore belt