Late Jurassic epithermal mineralization of Shitouban Au deposit, Dehua-Youxi area, southeast China: Quartz Rb Sr dating, fluid inclusions, and H-O-S-Pb-Sr isotope analyses

Fan, Xueli; Fan, Fei‐Peng; Xing, Guangfu; Jiang, Shao‐Yong

doi:10.1016/j.gexplo.2022.106964

Cited by 3 publications

(2 citation statements)

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“…The research area hosts quartz diorites from the Himalayan-Indosinian period and shallow intrusive rocks and subvolcanic rocks from the Yanshanian period. The tectonic and magmatic events during the Yanshanian period led to extensive intrusion activity, providing the region with abundant mineral resources, heat sources, and ore-forming spaces, thereby contributing to the formation of rich mineral deposits [9,10,29].…”

Section: Geological Settingsmentioning

confidence: 99%

“…Some notable regions include Shanghang in the southwest, Jianning in the northwest, Zhenghe-Jian'ou in the north, and Dehua-Youxi-Yongtai in the central-eastern part of the province, all of which have yielded large polymetallic deposits [6][7][8]. The Dehua-Youxi-Yongtai region is commonly referred to as the "Golden Triangle" exploration area, where significant gold mines, such as Ancun, Qiucun, and Shuangqishan, have been discovered [9][10][11][12]. Several scholars have conducted research using geological chronology, fluid inclusion data, and isotope dating, and concluded that the metals in this area originate from magmatic hydrothermal sources [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Deep Structure of Epithermal Deposits in Youxi Area: Insights from CSAMT and Dual-Frequency IP Data

He,

Wang,

Wen

et al. 2023

Minerals

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Epithermal deposits represent a significant category of gold occurrences, with their subsurface structure playing a key role in reserve assessments. Fujian Province, characterized by extensive Mesozoic volcanic activities, stands out as a noteworthy region for shallow hydrothermal mineralization in China. This paper focus on the Youxi area within Fujian Province, employing the dual-frequency induced polarization method (DFIP) and controlled-source audio-frequency magnetotelluric method (CSAMT) to investigate the target ore. The DFIP results revealed predominant northeast-oriented zones with high polarizability and notable apparent resistivity. The CSAMT data were inverted using the SCS2D software. Two-dimensional resistivity profiles reveal a three-layer electrical structure, comprising subsurface banded rhyolites influenced by fault zones, intermediate-low resistivity sandstone layers, and deep-seated high-resistivity conglomerates. The resistivity gradient zones and highly polarizable locations align closely with known local faults. We interpreted these resistivity gradient zones as prospective target areas for mineralization, a hypothesis subsequently validated by drilling results. Combining geochemical analyses of epithermal gold deposits with the electrical resistivity structure, we propose an explanatory model for the mechanism of the formation of epithermal gold–silver deposits in the Youxi area. The magmatic hydrothermal fluids ascended along the fault, underwent convection-driven interaction with meteoric waters, and subsequently metasomatized the host rocks. This integrated approach provides valuable insights into the geological processes governing epithermal gold–silver deposit formation in the Youxi region.

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Section: Geological Settingsmentioning

confidence: 99%