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·DOI / Corpus ID 229445141; Ore genesis of the Baishawo Be Li Nb Ta deposit in the northeast Hunan Province south China Evidence from geological geochemical and U Pb and Re Os geochronologic data
·A novel approach for Ta and Nb extraction consisting of the pre treatment of a coltan bearing ore with an ammonium bifluoride sub molten salt and subsequent acid leaching has been studied The effects from ore granulometry ammonium bifluoride ABF to ore mass ratio temperature and duration of fluorination on the degree of Ta and Nb extraction were
·Very few detailed studies are reported on the hydrometallurgical recovery of niobium and tantalum from their minerals Agulyanski 2004; Ayanda and Adekola 2011; Zhu and Cheng 2011; Nguyen and Lee 2019 Agulyanski 2004 investigated the chemistry of Ta and Nb fluoride based extraction in view of developing new materials for modern applications
· article{Xie2016TrackingMA title={Tracking magmatic and hydrothermal Nb Ta W Sn fractionation using mineral textures and composition A case study from the late Cretaceous Jiepailing ore district in the Nanling Range in South China} author={Lei Xie and Rucheng Wang and Xudong Che and Fangfang Huang and Saskia Erdmann and Wenlan
·The overall recovery of Ta and Nb were 96% and 97% respectively and the total content of Ta and Nb in the crude Ta Nb product was % % Ta2O5 % Nb2O5 when the solid to liquid mass
·This variation together with increasing Li Rb Cs and Ta but decreasing Nb/Ta and Zr/Hf ratios is consistent with the magmatic evolution In the Yashan pluton micas are protolithionite muscovite Li mica and lepidolite and zircons show wide concentration ranges of ZrO2 H fO2 U O2 T hO2 Y 2O3 and P2O5
·A novel approach for Ta and Nb extraction consisting of the pre treatment of a coltan bearing ore with an ammonium bifluoride sub molten salt and subsequent acid leaching has been studied
·This chapter reviews the petro and metallogenesis of Nb Ta Sn W granite related ore deposits as they occur in the Rwandese part of the KAB and provides a general overview of the geochemical mechanisms behind the formation of pegmatite and quartz vein hosted deposits and the distribution and enrichment of the ore elements Nb Ta Sn and W
·The Mufushan area which has abundant rare metal pegmatites within and around the Mufushan Granite Complex has become a major target for Ta Nb Li Be exploration in South China
·In 1950 the Bureau of Mines and Ames Laboratory of Iowa State University proposed an alternative method for the separation of Ta and Nb from tantalite using a liquid liquid extraction method Agulyansky 2004; Roskill Information Services Ltd 2013 Roskill Information Services Ltd 2016 Both processes are useful in separating Ta and Nb by
·implications for the quest for durable peace in the Niger Delta Overall it seeks to broaden our understanding of the complexity of environmen tal problems and social conflict in oil rich Niger Delta The conflicts in the Niger Delta remain intractable raising serious issues of security and the legitimacy of traditional and state institutions
·The Jiepailing mining district in the Nanling range in South China is well known for its granite related Sn Be F mineralization Recently drill holes have exposed an Nb Ta W Sn mineralized granitic porphyry and topaz bearing granite greisen at depth which we have studied here using mineral columbite rutile wolframite cassiterite zircon and mica
·The genesis of Ta Nb oxides in granitoid environments and in particular the role of deuteric fluids in Ta Nb ore formation remain controversial Ta Nb oxides in the Yichun deposit occur disseminated in a topaz lepidolite granite and in the intermediate zone of a zoned marginal pegmatite Columbite group minerals and microlite are the
·The importance of intracrustal differentiation on Nb/Ta fractionation Using global arc magma compilations we find that primitive arc magmas basalts have average Nb/Ta identical to that of mid
·The applications and utilization of Nb and Ta materials by industries is greatly dependent on the purity impurity level of the final products [3] In essence the production of high purity Nb/Ta metals from mineral resources as well as the choice or application variation depends on the mineral type ore or concentrate nature quality and physicochemical properties of the
· article{Wu2018ZirconOT title={Zircon of the No 782 deposit from the Great Xing an Range in NE China Implications for Nb REE Zr mineralization during magmatic hydrothermal evolution} author={Mingqian Wu and Bao feng Tian and Dehui Zhang and Guo zhan Xu and Wen xi Xu and Kunfeng Qiu} journal={Ore Geology Reviews} year={2018}
·The Mufushan rare metal ore concentration area in the middle of Jiangnan orogenic belt is an important Li Nb Ta resource base in eastern China The regional lithium resources are mainly concentrated in spodumene pegmatites However these
·Nb Ta Ti bearing oxide minerals Nb Ta bearing rutile columbite group minerals represent the most common Nb Ta host in topaz albite granites and related rocks from the Krásno Horní Slavkov ore
·Tantalum may be encountered in oxide minerals constituents of granitic mineral groups as by product of Nb Zr REE mining from carbonatites in columbite group minerals CGM in tapiolite and in wodginite pyrochlore and aeschynite as well Melcher et al 2017 Nb and Ta are further associated together in mineral inclusions in cassiterite ore which is the
·Most of the rare metal pegmatite deposits in China lie in West Central and South China and the Lijiapuzi Nb Ta deposit is the only pegmatite type Nb Ta deposit in Northeast China therefore a detailed study of the Lijiapuzi deposit is of great importance to the metallogeny and exploration of rare metal deposits in Northeast China The Nb Ta bearing
DOI / Corpus ID 204251139; Li Nb Ta mineralization in the Jurassic Yifeng granite aplite intrusion within the Neoproterozoic Jiuling batholith south China A fluid rich and quenching ore forming process
·Shihuiyao is a typical granite type Ta Nb deposit in the southern Great Xing an Range SGXR Northeast China The ore field is comprised of several granitic intrusions that were emplaced into the
