Han Runsheng, Wu Jianbiao, Zhang Yan, Chen Qing, Sun Bangtao
Southwest Institute of Geological Survey, Geological Survey Center for Nonferrous Metals Resources, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China.
Yunnan Chihong Zinc Germanium Co., Ltd, Qujing, 655011, Yunnan, China.
Sci Rep. 2024 Feb 26;14(1):4591. doi: 10.1038/s41598-024-55473-z.
The oblique distribution of orebodies is a basic feature of the spatial distribution of orebody groups in hydrothermal deposits, and it is closely related to the shearing effect. However, the oblique distribution patterns of orebody groups controlled by ore-controlling/ore-forming structures at different scales (orebody, ore deposit and ore field scales) and the underlying formation mechanism are unclear but could be used to directly constrain mineral exploration and prospecting breakthroughs in the deep and peripheral areas of ore deposits. This paper uses the northeastern Yunnan Ge-rich Pb-Zn ore concentration area in the Sichuan-Yunnan-Guizhou metallogenic area as an example to analyse and demonstrate the oblique distribution patterns of orebodies (orebody groups) controlled by ore-forming/ore-controlling structures at different scales and the underlying mechanical model based on the Theory and Methods of Ore field Geomechanics. The results indicate that in 3D space, the oblique distributions of orebodies (veins), orebody groups and ore deposits are controlled by the mechanical properties, kinematic characteristics, and tectonic stress fields of ore-forming/ore-controlling fault structures of different sequences during the mineralization period. This study has an important guiding role for ore field-scale exploration deployment, evaluation of deep and peripheral prospecting, and exploration project arrangement, with the aim of helping mining companies increase resource reserves and production.
矿体的斜列分布是热液矿床中矿体群空间分布的一个基本特征，且与剪切作用密切相关。然而，不同尺度（矿体、矿床和矿田尺度）的控矿/成矿构造所控制的矿体群斜列分布模式及其潜在的形成机制尚不清楚，但可用于直接制约矿床深部及外围地区的矿产勘查和找矿突破。本文以滇黔桂成矿带滇东北富锗铅锌矿集区为例，基于矿田地质力学理论与方法，分析论证不同尺度的成矿/控矿构造所控制的矿体（矿体群）斜列分布模式及其潜在的力学模型。结果表明，在三维空间中，矿体（矿脉）、矿体群和矿床的斜列分布受成矿期不同序次的成矿/控矿断裂构造的力学性质、运动学特征和构造应力场控制。本研究对矿田尺度的勘查部署、深部及外围找矿评价和勘查项目安排具有重要指导作用，旨在帮助矿业公司增加资源储量和产量。
