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胶东半岛蚕庄金矿床东庄子断裂控矿作用研究
李 晓 1，杨 鑫 1*，唐伟洋 1，陈树杰 1，杨晓鹏 1，辛梓豪 2，刘占坤 2，3
- 作者单位：
- （1. 招金矿业股份有限公司；2. 中南大学地球科学与信息物理学院；3. 自然资源部深部金矿勘查开采技术创新中心）
基金项目：
- 湖南省自然科学基金项目（2023JJ40715）；招金矿业股份有限公司地质科研项目(ZJ-CZJK2023260)；自然资源部深部金矿勘查开采技术创新中心开放课题（LDKF-2023BZX-15）
详细信息：
- 作者简介：
- 李 晓(1994—)，男，助理工程师，从事矿山地质勘查工作；E‑mail：lx19940103@gmail. com*
- 通讯作者：
- PDF下载
Study on the ore‑controlling role of the Dongzhuangzi Fault in the Canzhuang Gold Deposit, Jiaodong Peninsula
- English Author：
Li Xiao1, Yang Xin1, Tang Weiyang1, Chen Shujie1, Yang Xiaopeng1, Xin Zihao2, Liu Zhankun2,3
- Unit：
- (1. Zhaojin Mining Industry Co., Ltd.; 2. School of Geosciences and Info-physics, Central South University; 3. MNR Technology Innovation Center for Deep Gold Resources Exploration and Mining)
- 摘要
- 在线预览
- 参考文献
摘要:
蚕庄金矿床是胶东半岛西北部重要的“焦家式”破碎带蚀变岩型金矿床，东庄子断裂是矿区内最重要的控矿断裂之一。然而，东庄子断裂的发育特征及控矿规律尚不明确，制约了深边部成矿预测。通过系统的坑道地质调查和构造产状测量，厘定东庄子断裂地质特征，总结蚕庄金矿床构造控矿规律。研究结果表明，东庄子断裂在蚕庄金矿床内走向为 40°～70°，倾向北西，倾角25°～35°，成矿早期受北东向挤压应力作用，表现出张剪及右行走滑的特征；而成矿晚期表现出剪性特征，沿北西向伸展。东庄子断裂所控制的矿体具有间隔富集规律，具体表现为矿化现象沿断裂转折部位呈现近似等距分布的特征，北东侧断裂倾角平缓，北西侧倾角变化大。东庄子断裂控制的矿体沿主裂面呈北西向侧伏，侧伏角 30°～50°，矿化程度与规模随深度递减。东庄子断裂矿化蚀变产状与新城金矿床矿化蚀变一致，暗示焦家断裂与东庄子断裂具有同源深部成矿流体，焦家断裂深部成矿流体流入东庄子断裂。蚕庄金矿床内的“原东庄子断裂”可能为焦家断裂的主干部位，成矿潜力较大。
关键词:
构造控矿；成矿规律；东庄子断裂；蚕庄金矿床；胶东半岛
Abstract:
The Canzhuang Gold Deposit is a significant "Jiaojia‑style" fractured‑altered rock‑type deposit locatedin the northwestern Jiaodong Peninsula. The Dongzhuangzi Fault is one of the most important ore‑controlling faults inthe mining area. However, its structural characteristics and ore‑controlling patterns remain poorly understood, limitingthe prediction of deep and peripheral mineralization. Based on systematic underground tunnel geological surveys andstructural occurrence measurements, this study identifies the geological features of the Dongzhuangzi Fault and summa‑rizes the structural ore‑controlling patterns of the Canzhuang Gold Deposit. Results show that the Dongzhuangzi Faultstrikes 40°-70°, dips to the NW at 25°-35°, and exhibits tensile‑shear and dextral strike‑slip characteristics during theearly mineralization stage under NE‑oriented compressive stress. In the late mineralization stage, the fault demonstratesa shearing‑dominated behavior with NW‑oriented extensional features. The orebodies controlled by the fault show apattern of periodic enrichment, with mineralization occurring near flexures of the fault in a quasi‑equidistant distribution.The fault exhibits gentler dips on the NE side and steeper dips on the NW side. The orebodies controlled by the faultplunge northwestward along the main fracture surface at an angle of 30°-50° , and both mineralization intensity andscale decrease with depth. The mineralization and alteration occurrence of the Dongzhuangzi Fault is consistent withthe mineralization and alteration zones of the Xincheng Gold Deposit. This suggests that the Dongzhuangzi Faultand Jiaojia Fault share a common deep‑source ore‑forming fluid, with the Jiaojia Fault’s deep fluids migrating into theDongzhuangzi Fault. It is proposed that the previously termed "Dongzhuangzi Fault" within the Canzhuang Gold Depositmay represent a principal branch of the Jiaojia Fault, indicating significant mineralization potential.
Keywords:
structural ore control; metallogenic pattern; Dongzhuangzi Fault; Canzhuang Gold Deposit; JiaodongPeninsula
