Two episodes of REE mineralization in the Qinling Orogenic Belt, Central China: in-situ U-Th-Pb dating of bastnäsite and monazite

Zhang, Wei; Chen, Wei Terry; Gao, Jianfeng; Chen, Hua-Kai; Li, Jinghui

doi:10.1007/s00126-019-00875-7

Cited by 57 publications

(35 citation statements)

References 62 publications

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“…成矿流体具中高温(主要200~400°C, 最高可达550°C)、高盐特征, 流体包裹体内富含各种子晶, 包括氯化物(如石盐、钾石盐)、硫酸盐(如芒 [36] . [38] . 它们均赋存于碱性岩-碳酸岩杂岩体中, 矿体即为矿化的正长岩或碳酸岩, 但两者在矿石矿物组合及矿化特点上有一定差异.…”

Section: 四川冕宁-德昌成矿带unclassified

“…锆石U-Pb年龄显示两个矿床大致形成于~430 Ma [39] , 与勉略洋盆打开的裂谷环境有关. 不少针对庙垭矿床稀土矿物U-Th-Pb定年的研究也获得了一系列二叠纪的年龄(234~206 Ma), 被认为代表了后期热液改造与再富集事件 [38] , 抑或代表了一期新的稀土成矿事件 [41] . 北秦岭地区目前仅发现有位于河南西峡县的太平镇稀土矿床, 其稀土氧化物资源量达15万吨(平均品位 2.23%) [42] .…”

Section: 四川冕宁-德昌成矿带unclassified

“…矿体主要赋存于早古生代斜长花岗岩与二郎坪群火神庙组斜长角闪(片)岩中, 矿化主要为热液脉型, 以发育大量含矿石英-萤石脉、石英-萤石-重晶石脉以及石英-萤石-方解石脉为特点. 氟碳铈矿U-Th-Pb定年显示该矿床矿化时代为~420 Ma, 可能形成于二郎坪弧后盆地拉张的伸展构造背景 [38,42] . 有关该矿床成因机制方面的研究不多, 部分学者认为其成矿流体来源于该区同时代的花岗岩 [42] , 但其他学者根据矿物组合和蚀变类型推测矿床的形成更可能与火成碳酸岩相关 [38] .…”

Section: 四川冕宁-德昌成矿带unclassified

“…稀土矿物如独居石和氟碳铈矿的U-Th-Pb年龄结果显示稀土矿化发生于214~207 Ma [38] , 与共生辉钼矿获得的Re-Os年龄一致(225~208 Ma) [45] , 说明该期矿化可能形成于与中生代华北与扬子克拉通碰撞(230~220 Ma) 后的伸展构造背景. Cu [49] , 部分矿床还富集REE、Co、Mo、Au等元素.…”

Section: 华北克拉通南缘以产出稀土-多金属矿床为特点unclassified

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The types, ore genesis and resource perspective of endogenic REE deposits in China

Fan¹,

Niu²,

Li³

et al. 2020

Chin. Sci. Bull.

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Section: 四川冕宁-德昌成矿带unclassified

Section: 华北克拉通南缘以产出稀土-多金属矿床为特点unclassified

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The types, ore genesis and resource perspective of endogenic REE deposits in China

Fan¹,

Niu²,

Li³

et al. 2020

Chin. Sci. Bull.

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“…Both complexes have zircon U-Pb ages of 440-430 Ma, which have been interpreted as intrusive ages (Xu et al 2008;Ying et al 2017;Zhu et al 2017;Chen et al 2018;Su et al 2019). However, previous studies also reported monazite ages of ~230 Ma, which has been interpreted as either an independent REE mineralization (Xu et al 2014) or an REE remobilization event (Ying et al 2017;Zhang et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Fingerprinting REE mineralization and hydrothermal remobilization history of the carbonatite-alkaline complexes, Central China: Constraints from in situ elemental and isotopic analyses of phosphate minerals

Zhao

et al. 2021

American Mineralogist

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Carbonatites and related alkaline rocks host most REE resources. Phosphate minerals, e.g., apatite and monazite, commonly occur as the main REE-host in carbonatites and have been used for tracing magmatic and mineralization processes. Many carbonatite intrusions undergo metamorphic and/or metasomatic modification after emplacement; however, the effects of such secondary events are controversial. In this study, the Miaoya and Shaxiongdong carbonatite-alkaline complexes, in the South Qinling Belt of Central China, are selected to unravel their magmatic and hydrothermal remobilization histories. Both the complexes are accompanied by Nb-REE mineralization and contain apatite and monazite-(Ce) as the major REE carriers. Apatite grains from the two complexes commonly show typical replacement textures related to fluid metasomatism, due to coupled dissolution-reprecipitation. The altered apatite domains, which contain abundant monazite-(Ce) inclusions or are locally surrounded by fine-grained monazite-(Ce), have average REE concentrations lower than primary apatite. These monazite-(Ce) inclusions and fine-grained monazite-(Ce) grains are proposed to have formed by the leaching REE from primary apatite grains during fluid metasomatism. A second type of monazite-(Ce), not spatially associated with apatite, shows porous textures and zoning under BSE imaging. Spot analyses of these monazite-(Ce) grains have variable U-Th-Pb ages of 210-410 Ma and show a peak age of 230 Ma, which is significantly younger than the emplacement age (440-430 Ma) but are This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America. The published version is subject to change. Cite as Authors (Year) Title. American Mineralogist, in press.

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Magmatic-hydrothermal evolution of an unusual Mo-rich carbonatite: a case study using LA-ICP-MS fluid inclusion microanalysis and He–Ar isotopes from the Huangshui’an deposit, Qinling, China

et al. 2021

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Two episodes of REE mineralization in the Qinling Orogenic Belt, Central China: in-situ U-Th-Pb dating of bastnäsite and monazite

Cited by 57 publications

References 62 publications

The types, ore genesis and resource perspective of endogenic REE deposits in China

The types, ore genesis and resource perspective of endogenic REE deposits in China

Fingerprinting REE mineralization and hydrothermal remobilization history of the carbonatite-alkaline complexes, Central China: Constraints from in situ elemental and isotopic analyses of phosphate minerals

Magmatic-hydrothermal evolution of an unusual Mo-rich carbonatite: a case study using LA-ICP-MS fluid inclusion microanalysis and He–Ar isotopes from the Huangshui’an deposit, Qinling, China

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