Scholarlink

<p>The giant Jiaodong gold province features gold mineralization ~ 1.9 Ga younger than its Precambrian host rocks, with the origin of its ore-forming fluids long debated. Here, we use in situ U–Pb geochronology and Sm–Nd isotope compositions of hydrothermal monazite to constrain fluid sources across ten representative gold deposits at Jiaodong. Monazite U–Pb ages define a synchronous regional metallogenic event at 120 ± 5 Ma. Hydrothermal monazite yields ε<sub>Nd</sub>(t) values of − 22.36 to − 10.96, and numerical mixing models show these large variations are best explained by variable degrees of fluid–rock interaction between enriched lithospheric mantle-derived fluids and different host rocks. Our results confirm mantle-derived fluids as the source of Jiaodong’s giant gold mineralization and demonstrate significant fluid–rock interaction during ore formation. Our study further shows that linking in situ U‑Pb dating and Sm‑Nd isotope analyses provide an efficient approach for resolving the genesis of hydrothermal gold deposits.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

In situ monazite isotopes reveal mantle fluids for giant Jiaodong gold mineralization

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月25日

查看全文
  • Jinyu Li,
  • Shao-Yong Jiang,
  • Feng Yuan,
  • Jin-Lei Sun,
  • Wen Zhang,
  • Xiao-Wei Yu,
  • Jin-Hui Wang,
  • Zhi-Qiang Chen

摘要

The giant Jiaodong gold province features gold mineralization ~ 1.9 Ga younger than its Precambrian host rocks, with the origin of its ore-forming fluids long debated. Here, we use in situ U–Pb geochronology and Sm–Nd isotope compositions of hydrothermal monazite to constrain fluid sources across ten representative gold deposits at Jiaodong. Monazite U–Pb ages define a synchronous regional metallogenic event at 120 ± 5 Ma. Hydrothermal monazite yields εNd(t) values of − 22.36 to − 10.96, and numerical mixing models show these large variations are best explained by variable degrees of fluid–rock interaction between enriched lithospheric mantle-derived fluids and different host rocks. Our results confirm mantle-derived fluids as the source of Jiaodong’s giant gold mineralization and demonstrate significant fluid–rock interaction during ore formation. Our study further shows that linking in situ U‑Pb dating and Sm‑Nd isotope analyses provide an efficient approach for resolving the genesis of hydrothermal gold deposits.