Magmatic to hydrothermal evolution of Bianjiadayuan Ag-Pb-Zn-Sn deposit， NE·China: a quartz texture and trace elements study

作     者：Xin Wang Nan Qi Xinyou Zhu Xiheng He Haowei Gu Xiaohua Deng 

作者机构：Frontiers Science Center for Deep-time Digital Earth， China University of Geosciences (Beijing) State Key Laboratory of Geological Processes and Mineral Resources， China University of Geosciences(Beijing) State Key Laboratory of Continental Dynamics， Department of Geology， Northwest University Sino-Zijin Resources Co.， Ltd. School of Earth Science and Resources， Chang'an University 

出 版 物：《Journal of Earth Science》 (地球科学学刊)

年 卷 期：2024年

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：supported by the National Natural Science Foundation of China (42222205) the National Key Research and Development Program of China (2017YFC0602403) the Fundamental Research Funds for the Central Universities, CHD (No. 300102273301) 

摘      要：Quartz trace elements are extensively employed in studying magmatic evolution， fluid evolution， and metal enrichment processes. The Bianjiadayuan deposit is a typical magmatic-hydrothermal Ag-Pb-Zn-Sn deposit. However， there is a noticeable scarcity of studies focusing on complex magmatic-hydrothermal evolution systems for the Bianjiadayuan deposit. In this study， we investigate the variation and indication of the Bianjiadayuan Ag-Pb-Zn-Sn deposit in northeastern China to gain insight into the physicochemical evolution of mineralization using Cathodoluminescence (CL) textures and laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) of quartz. Five types of quartz (Q1 to Q5) were identified from the Bianjiadayuan Ag-Pb-Zn-Sn deposit. From Q1 in quartz porphyry to Q5 in Ag-Pb-Zn veins， the CL intensity of quartz exhibits a gradual decrease. The Ti content in quartz decreases and the Ge content， Ge/Ti and Al/Ti ratios increase from Q1 to Q5， indicating a decrease in temperature from the magmatic to the hydrothermal stage. Positive correlations between Ge and Al， as well as Li and Al concentrations in quartz from the Bianjiadayuan deposit， suggesting that the Al and Li contents are influenced by temperature. The variation in Sb content shows an opposite trend to Ti content and has a positive correlation with Ge and Al contents in quartz， suggesting that Sb content could also be dominated by temperature. Thus， the trace elements in quartz from each stage at the Bianjiadayuan deposit indicate that cooling is a critical factor in Ag mineralization. Furthermore， quartz phenocryst (Q1) from the quartz porphyry shows low Al/Ti (mostly 1 ppm， mostly tens of ppm) is notably higher compared to quartz in other lithologies including Sn-bearing quartz veins ( 1 ppm)， suggesting that Sb contents can serve as an effective indicator