Abstract Although REE (lanthanides + Sc Y) mineralization in alkaline silicate systems is commonly accompanied with Zr worldwide, our understanding of the relationship between and still incomplete. The Baerzhe deposit Northeastern China a reservoir REE, Nb, Zr, Be linked to formation an Early Cretaceous, silica-saturated, intrusive complex. In this study, we use situ laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) analyses zircon monazite crystals constrain at...

Research Article| June 01, 2018 Textural Features and Chemical Evolution in Ta-Nb Oxides: Implications for Deuteric Rare-Metal Mineralization the Yichun Granite-Marginal Pegmatite, Southeastern China Mingqian Wu; Wu 1 State Key Laboratory of Geological Processes Mineral Resources, School Earth Sciences University Geosciences (Beijing), Beijing 100083, China2 Department Environmental Sciences, Windsor, Ontario, Canada N9B 3P4 Search other works by this author on: GSW Google Scholar Iain M....

The Dajishan deposit, located in the Nanling Range of southeastern China, is largest wolframite deposit world. Approximately two-thirds tungsten resource contained large quartz-wolframite-K-feldspar-muscovite-scheelite-sulfide-(beryl) veins, but remainder occurs as and lesser scheelite, disseminated through Nb-Ta mineralized No. 69 granite, which characterized by abundant snowball quartz crystals. Disseminated granite-hosted mostly a replacement after lath-shaped muscovite, although an...

Abstract The Early Cretaceous Baerzhe deposit in Inner Mongolia, Northeast China, hosts a world-class resource of rare earth elements (REEs), niobium, zirconium, and beryllium. In contrast to previous interpretations the as multiphase, miaskitic alkaline granite, our observations relationships various rock phases, textural features chemical evolution amphibole, distribution primary secondary mineral assemblages suggest that igneous phases evolved from hypersolvus porphyritic through variably...

The exact role magmatic versus metasomatic processes play in Ta-Nb mineralization is a question that has been debatable for several decades. Jiabusi deposit chosen to address this question, its ample endowments of variety oxides and mica the various rock types could provide insights into whole evolutional history ore-forming during magmatic-hydrothermal evolution. Textural chemical evidence suggests Fe-mica granite pegmatitic portion magmatic, indicating co-precipitated columbite-group...

Earth’s enriched lithospheric mantle is postulated to be a natural repository of gold and rare earth element (REE) concentrations. We reviewed evidence for REE from the Jiaobei Luxi terranes in North China Craton (NCC), which are world’s third largest province China’s deposit, respectively. In both terranes, extensive Archean tonalite–trondhjemite–granodiorite (TTG) suites exposed, but whether their source partial melting pressure different...

Peraluminous rare-metal granites from South China constitute the largest, minable hard-rock lithium resources in world. An ongoing debate is whether Li these was concentrated to economic grades via igneous processes alone, or metasomatic played an indispensable role achieving grades. The Yichun deposit a suitable locality study mineralization processes; here, zoned petalite (LiAlSi4O10)-bearing pegmatite sheet intruded by underlying Li-rich granites, where both and have previously been...

巴尔哲碱性花岗岩型关键金属矿床拥有世界级Zr、Nb、Be、REE资源量,其成矿具有多期次、多阶段特征。Zr矿化(I阶段)发生在岩浆期,表现为多锆相(agpaitic)界熔花岗岩熔体结晶出原生钠锆硅酸盐(斜钠锆石),在该阶段,多锆相界熔花岗岩经历钠质交代,斜钠锆石原位分解为锆石-石英假象,假象中锆石U-Pb年代学表明锆成矿发生在123.9±0.6Ma。随后,Nb-Be-REE矿化以多种矿物形式、分三个连续的阶段(II、III、IV阶段)、呈浸染状分布于遭受赤铁矿化的界熔花岗岩中,重稀土为主的矿物普遍形成于以轻稀土为主的矿物之前。II阶段是巴尔哲矿床中Nb、Be和重稀土矿化的主要阶段,大部分界熔花岗岩均遭受了不同程度的赤铁矿化,并伴随钇兴安石、铈兴安石、钇易解石、铌铁矿等稀有稀土金属矿物的形成,主要形成以石英为主的假象(Nb-Be-REE假象),Nb-Be-REE假象的前体矿物并非某种Nb-Be-REE矿物。III阶段主要形成黑稀金矿、独居石及氟碳铈矿,热液独居石U-Pb年代学指示该阶段热液成矿活动发生在122.8±0.6Ma。氟铈矿和氟碳钙铈矿部分交代氟碳铈矿构成了IV阶段的矿物组...

The newly discovered Zaorendao gold deposit is in the Tongren-Xiahe-Hezuo polymetallic district westernmost West Qinling orogenic belt. estimated pre-mining resource approximately 13.6 t of Au at an average grade 3.02 g/t. Mineralization predominantly controlled by NW-trending and EW-trending faults within diorite intrusions surrounding sedimentary rocks. In present study, situ zircon U–Pb geochronology Lu–Hf isotopic analyses ore-hosting were measured using LA-ICP-MS. data suggest that was...

The world-class Shizhuyuan W-Sn-Mo-Bi deposit is spatially related to the Qianlishan granite complex (QGC) in Hunan Province, China. However, age and classification of QGC are still debated, a better understanding temporal genetic relationship between essential. Here, we present chemical compositions intrusive phases results detailed zircon U-Pb dating muscovite Ar-Ar mineralized greisen vein. Our new laser ablation inductively coupled plasma mass spectrometry data constrain emplacement...

Abstract Magmatic and metasomatic zircon occurs in many alkaline igneous rocks both are potential economic reservoirs of Zr, some places, rare-earth elements. The Baerzhe deposit China is an example a system where types occur. Previous studies recognized deuteric variably altered magmatic transsolvus miaskitic granite, as well four agpaitic granite. In this study, the relationships among, origins of, how these relate to models for rare-metal mineralization assessed. situ backscattered...

Thorium deposit related to alkaline/peralkaline magmatism is the dominant thorium source. Its ore-forming mechanism has long been fascinating. The Younusisayi Th deposit, hosted in early Paleozoic alkali-feldspar granite South Altyn Complex, NW China, an example explore mineralization processes magmatic-hydrothermal systems. Zircon U-Pb dating shows that ore-hosting granites are emplaced at 445.7–439.0 ± 1.3 Ma. apatite occurs concomitantly with thorite mineralized formed 442.0–438.0 14 Ma,...

The Baerzhe deposit represents world-class mineralization of rare metals, in particular earth elements (REEs) and Nb, shares mineralogical geochemical similarities with the Strange Lake Canada. However, mechanisms responsible for rare-metal enrichment at are still under debate. Mineralization is characterized by multiple stages dissolution, re-precipitation elements, as deposit. Zirconium was concentrated during magmatic fractionation elpidite a transsolvus agpaitic granite (Stage I),...

Abstract Debate continues over the reducing mechanisms for formation of unconformity‐related uranium (URU) deposits. This paper evaluates, first time, potential iron‐rich chlorite as a reductant mineralization using reactive fluid flow modeling method. Our results confirm that Fe 2+ , released from breakdown chlorite, can reduce aqueous hexavalent to precipitate economically significant URU deposits similar in size and grade those formed with CH 4 agent. The resulting tends occur basement...

The contribution of magmatic and hydrothermal processes to the formation rare metal minerals in highly-evolved peraluminous systems has received great attention, yet is still debatable. Ta-Nb-W-Sn mineralization at Jianfengling deposit, Nanling range Southeast China, occurs a intrusion that comprises three rock phases, namely biotite granite, zinnwaldite topaz granite from bottom top. Rare ores occur as disseminations constrained granite. In this study, textural chemical analyses ore were...

Abstract The Wawa gold corridor, located in the Michipicoten greenstone belt of Superior province, Canada, comprises Au-bearing shear zones that crosscut 2745 Ma Jubilee stock and evolved during protracted deformation (D1-D3). Numerous generations sulfide minerals crystallized before, during, after these events, is associated with D1 arsenopyrite, D2 pyrite, Bi-Te phases chalcopyrite assemblages D3 veins. Observations porosity inclusions arsenopyrite pyrite suggest sulfides underwent coupled...