Guangfu Xing

Early Paleozoic subduction-collision orogeny in South China: Evidence from Silurian meta-mafic rocks in the Cathaysia block

LongMing Li, Wenjiao Xiao, Xilin Zhao, Guangfu Xing et autres

Abstract To better comprehend the nature and geodynamic processes of the early Paleozoic orogeny in the South China block, comprehensive geochronological, geochemical, and isotopic studies were conducted on meta-mafic rocks, specifically the Dongyue, Shangyan, and Jiumu amphibolites, from the NW Fujian region …

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滇中黏土型锂矿中锂的赋存状态与富集机制: 基于SWIR光谱矿物填图的解析

Yan ZHOU, MengRu LEI, AiGuo WANG, NaiCen XU et autres

锂作为关键战略性金属,其资源需求日益增长。碳酸盐岩容矿的黏土型锂矿是一种重要的锂资源类型,但对其锂的赋存状态与富集机制认识不清,制约了资源评价与勘探。滇中小石桥锂矿是近年来新发现的该类型矿床,本研究采用短波红外反射光谱(SWIR)技术,结合X射线衍射(XRD)分析,系统研究了该矿床的矿物组合、空间分布及其与锂富集成矿的关系。结果表明,矿化层内存在厘米尺度的矿物相变,高岭石与伊利石丰度呈此消彼长关系。低品位矿石(Li2O≤0.35%)矿物组合以高岭石和伊利石为主,锂可能以离子吸附态赋存于黏土矿物表面或边缘。中高品位矿石(Li2O>0.35%)中则显著富集锂绿泥石和蒙脱石,锂绿泥石丰度与Li2O品位呈显著正相关,是形成高品位矿化的关键矿物,蒙脱石因其强吸附能力也是重要的载锂矿物。研究明确了锂绿泥石和蒙脱石信号的大量出现可作为中高品位矿体的光谱勘查标志。含矿层位的矿物组合和品位在空间上的急剧变化暗示其经历了表生风化沉积富集与后期成岩热液流体的交代改造,富锂流体交代先存黏土矿物(如高岭石、伊利石)形成锂绿泥石是形成高品位矿体的关键机制。

SWIR spectroscopy and mineral chemistry of Li-bearing micas in NW Jiangxi: Implications for the genesis and exploration of granite-related Li deposits

Yan Zhou, Jiandong Sun, LongMing Li, Feipeng Fan et autres

• Composition, texture, and SWIR spectral features of Li-bearing micas were studied. • Zoning textures with compositional variations are commonly developed in white mica. • Magmatic high fractionation is critical for supernormal Li enrichment. • Feature SWIR parameters of Li-rich micas hold …

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Wide distribution of 3.46–3.1 Ga rocks in the Kongling Complex of the Huangling area, Yangtze Craton, south China: Petrogenesis and significance

Chunyan Dong, Yunxu Wei, Simon A. Wilde, Hangqiang Xie et autres

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Research status and prospect of Ga-rich alunite deposits

Feipeng Fan, Pei Ni, Guangfu Xing, Yan Zhou

镓是一种重要的战略性矿产资源，是众多高新技术产业的重要原材料。富镓明矾石矿床是一种新类型矿床，属于浅成低温热液型矿床，主要分布在板块俯冲带上盘古陆边缘及岛弧的岩浆弧和弧后张裂带，矿体受中心式和裂隙式火山通道控制。该类矿床镓含量22 ～500 ppm，主要赋存在岩浆热液型明矾石矿物中。明矾石等非金属矿物是酸性岩浆热液流体交代中酸性火山岩等围岩发生一系列化学溶解和沉淀作用形成，是高硫化型浅成低温热液型矿床高级泥化蚀变带的主要组成矿物。富镓明矾石矿床成矿流体以岩浆水为主，后期有大气水加入，温度和压力是控制镓成矿的重要因素，成矿过程中发生过沸腾和不混溶作用，明矾石K/Na和Ga含量距火山口由近到远而呈增加趋势。目前，对该类矿床勘查手段还未开展针对性研究，但对明矾石所在的高级泥化蚀变带开展过大量的找矿勘查工作。以明矾石为主的高级泥化蚀变带边部磁异常较低，其中硅质带和黄铁矿化带电阻率较为复杂，航空放射性测量方法可圈定出富钾异常区。Au、Cu、Ag、Mo、Re、Zn、Pb、Sn、In、Hg、S、Al、Si、Bi、Ga、Ge、W等元素异常是高硫化型浅成低温热液型矿床的主要特征元素，可用来圈定富镓明矾石矿床体。近年来，短波红外光谱测量根据明矾石1480 nm吸收峰位的变化特征可快速圈定出明矾石矿物异常区，明矾石矿物微量元素变化可反演成矿流体的演化规律、示踪成矿物质来源、预测热液活动中心，可实现找矿预测和深部勘查。

Scandium and gallium in weathered basalts as unconventional resources

Mei‐Fu Zhou, Wen Winston ZHAO, Zhenchao Wang, Min Wang et autres

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Origin and Key Enrichment Factors of Helium Resource in the Lower Yangtze Region, Eastern China

Chengcheng Zhang, Chaogang Fang, Jianqing Li, Guangfu Xing et autres

Abstract Helium is a critical, scarce, and strategic resource, often found in association with natural gas. This study reports the first discovery of overpressured helium-rich natural gas in the Lower Yangtze Region of Eastern China, with helium concentrations reaching as high as …

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Identification of ca. 470 Ma continental margin arc volcanism in the Cathaysia Block interior: Constrains on the geodynamic process of the early Paleozoic orogeny in South China

Longming Li, Fan Xiao, Xilin Zhao, Guangfu Xing et autres

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Middle Ordovician climatic and oceanic destabilization in a slope-setting of the Yangtze platform, South China, and its role as a regional brake on the Ordovician radiations

Chaogang Fang, Mu Liu, Chengcheng Zhang, Hailei Tang et autres

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Identifying and characterizing missing source orogens for syn-orogenic basins based on detrital accessory mineral U-Pb geochronology and trace element geochemistry

Lijun Wang, Shoufa Lin, Wenjiao Xiao, John M. Hanchar et autres

Abstract Identifying source orogens for syn-orogenic sediments in dispersed fragments of a supercontinent provides key information on the tectonic evolution of the orogens involved in supercontinent assembly and on paleogeographic reconstruction. An approach using U-Pb geochronology and trace elements of multiple detrital …

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Preface for the Thematic Issue: Tectono‐Magmatic‐Metallogenesis in Eastern China

Xilin Zhao, Shengyao Yu, Guangfu Xing, Tatsuki Tsujimori

This work was

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The early Paleozoic Wuyi–Yunkai orogeny in South China: a collisional orogeny with a major lag in time between onset of collision and peak metamorphism in subducted continental crust

Shoufa Lin, Lijun Wang, Wenjiao Xiao, Guangfu Xing et autres

Abstract Collisional orogeny is characterized by deep subduction of continental crust and major crustal thickening, leading to high-pressure/high-temperature metamorphism and anataxis of the subducted continental crust. Since conductive heating of large slabs of cold, subducted continental crust is a slow process, heating …

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