U–Pb isotope and trace element analysis of columbite- (Mn) …

U–Pb isotopes and trace elements of columbite-(Mn) and zircon from an early Cretaceous pegmatite dike in the Xiaoqinling district, North China Craton, were analyzed using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) to better understand the suitability of these minerals for U–Pb geochronology when they …

Columbite-group minerals and mica of peraluminous

The newly discovered Zhaojinggou Ta Nb deposit in the northern margin of the North China Craton contains ore reserves of more than 38 Mt. at an average grade of 0.013 wt% Ta 2 O 5 and 0.012 wt% Nb 2 O 5.The Ta Nb mineralization is mainly hosted in a peraluminous, albite granite body, which is about 400 m long and 20 to 100 m wide, with …

Ultrastructure of a Columbite-Tantalite Mineral …

Published 03 Dec 2022. Abstract. The formation of columbite-group mineral phases in peraluminous granite has not been demonstrated to date. Here, a nanoscale study of the columbite-tantalite mineral in the …

Geological features and genesis of the Bayan Obo REE ore …

In China the utilization of REE in agriculture is rapidly develop- ing. The area of farmland to which REE-containing fertilizers were applied reached 1.38 Mha in 1989. The Bayan Obo ore deposit in Inner Mongolia, China is the largest rare earth metal deposit in the world. Its REE reserve is -75% of the known re- serves of the world.

(PDF) Ultrastructure of a Columbite-Tantalite Mineral from …

Here, a nanoscale study of the columbite-tantalite mineral in the Zhaojinggou Nb-Ta deposit in North China Craton elucidated its formation mechanism and the role of fluids in Nb-Ta mineralization.

Geochronology, petrology, and lithium isotope geochemistry …

The SIMS analyses were performed with a CAMECA IMS 1280-HR system at the State Key Laboratory of Isotope Geochemistry (SKLaBIG), Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIG–CAS), Guangzhou, China. Analytical procedures were similar to those described by Li et al. (2009). Zircon. Zircon and …

Extractive metallurgy of columbite-tantalite ore: A detailed …

Columbite-tantalite is a solid solution whose chemical composition varies by the substitution and coexistence of niobium, tantalum, manganese, and iron, in ore structures between pure columbite ...

Multistage ore formation in the world's largest REE-Nb-Fe …

The Bayan Obo deposit is located on the northern margin of the North China Craton (NCC), adjacent to the Central Asian Orogenic Belt in the north, and near the convergence of the Siberian Plate and the North China Plate (Fig. 1 a).The deposit is regarded to be closely related to a huge continental rift zone system formed during the …

Mineralogy of columbite-group minerals from the rare …

The Qinling orogen in central China extending about 1500 km from the Tongbai Mountain in the east to the Qilian and Kunlun Mountains in the west is a famous and important orogen as a result of convergence between South China Block (SCB) and North China Block (NCB) (Fig. 1) (Zhang et al., 1989, 2001; Ratschbacher et al., 2003).It …

Geology, market and supply chain of niobium and …

The Ta market is unstable due in part to historic influx of 'conflict' columbite-tantalite concentrate, or "Coltan," that caused Ta mines in Australia and Canada to be placed on care and maintenance. ... Ye X (1992) Geological features and genesis of the Bayan Obo REE ore deposit, Inner Mongolia, China. Appl Geochem 7:429–442. Google ...

Occurrence State and Distribution Regularity of Key Metal

The Bayan Obo district is located at the northern margin of the North China Craton, bordering the Central Asian Orogenic Belt (Fig. 1a). 12,19,20 The ore district is 16 km long from east to west and 3 km wide from north to south, with a total area of about 48 km 2. 21 According to the boundary grade of iron, the Bayan Obo deposit is composed of …

Three-stage niobium mineralization at Bayan Obo, China

PDF | The Chinese Bayan Obo deposit is a world-class rare earth element (REE) deposit with considerable niobium (Nb) and iron (Fe) resources. A complete... | …

Uplift and exhumation of the Chakabeishan ore district in …

The Zongwulong tectonic belt extends in the NWW direction between the northern Qaidam and the southern Qilian tectonic belts (Guo et al., 2009, Peng et al., 2016).The Chakabeishan ore district (Fig. 1), a new potentially promising target of lithium ore from the northern margin of the Qaidam Basin, is located in the eastern Zongwulong …

Chemical compositions of carbonate minerals from Bayan …

Carbonate rocks at the Bayan Obo giant rare earth element (REE)–Nb–Fe ore deposit, Inner Mongolia, China are divided into four categories: sedimentary limestone and dolostone (H8 s), deformed mineralized coarse-grained dolomite marble (H8 c) and fine-grained dolomite marble (H8 f), and carbonatite dikes (D), based on their texture, mineral …

Mineralogy of columbite-group minerals from the rare …

The East-Qinling pegmatite district located in the North Qinling terrane is the largest one in the Qinling orogen, Central China. It is famous for its rare-element (REL) reserves, but its genesis is unraveled. We present in-situ major- and trace-element chemistry and U-Pb dating analysis of columbite-group minerals (CGM) and wodginite from representative Li …

Age of the Dahongliutan rare metal pegmatite deposit, West …

Section snippets Regional and ore deposit geology. The western Kunlun orogenic belt (WKO) is an accretionary orogenic belt bordered by the Tibetan plateau in the south and the Tarim Basin in the north (Xiao et al., 2003, Xiao et al., 2005, Hu et al., 2015; Fig. 1a).The tectonic evolution of WKO was closely related to the subduction of the Proto …

Quantitative evaluation of metamictisation of …

Raman spectroscopic analysis was performed on columbite-(Mn) samples from a variety of previously studied rare-element pegmatites in Xinjiang, China, including the Jing'erquan No. 1 …

Ore Geology Reviews

U–Pb geochronology of hydrothermal zircon, monazite, cassiterite, and columbite-group minerals constrain the age of Rb mineralization to ca. 255–250 Ma. ... NW China. Ore Geology Reviews, 141 (2021), Article 104636, 10.1016/j.oregeorev.2021.104636. Google Scholar.

Two episodic Nb-Ta mineralization events and genesis of the …

Columbite-group minerals and mica of peraluminous granite record the magmatic-hydrothermal processes that formed the Zhaojinggou Ta Nb deposit in the North China Craton. Bo Wei C. Wang Zhenhua Zhao H. Bao

Frontiers | Columbite-Tantalite Group Mineral U-Pb …

The Chaqiabeishan area is characterized by small Li-rich granitic pegmatites in the Quanji Massif (QM), northwest China. In this study, the columbite-tantalite group …

Coltan | Earth Sciences Museum

Coltan is short for columbite-tantalite, a dull metallic ore. When refined, coltan becomes a heat resistant powder, metallic tantalum, which has unique properties for storing electrical charge. Coltan occurs in granitic pegmatites, pockets where the deep seated molten rock crystallized last. Pegmatites contain many rare metals, as well as ...

Geochemical constraints on the genesis of the Bayan Obo …

The sedimentary carbonate-hosted giant Bayan Obo REE–Fe–Nb ore deposit of Inner Mongolia, China: cornerstone examples for giant polymetallic ore deposits of hydrothermal origin. USGS Bulletin (1997) ... Sieve-textured columbite (Clb1-II, ∼100 μm) dispersed in the fluorination and chloritization dolomite carbonatite, with a U–Pb age of ...

Mineralogy of columbite-group minerals from the rare …

Mineralogy of columbite-group minerals from the rare-element pegmatite dykes in the East-Qinling orogen, central China: Implications for formation times and ore genesis | …

Episodic Nb–Ta mineralisation in South China: Constraints …

Semantic Scholar extracted view of "Episodic Nb–Ta mineralisation in South China: Constraints from in situ LA–ICP–MS columbite-tantalite U–Pb dating" by Xudong Che et al. ... The ore deposits of the Mesozoic age in South China can be divided into three groups, each with different metal associations and spatial distributions and each ...

Two episodic Nb-Ta mineralization events and genesis of …

The Zhaojinggou rare-metal deposit is located in the Wulashan-Daqingshan region, central north margin of the North China Craton. Nb-Ta mineralizations are mainly hosted in the biotite alkali-feldspar granite (BAG) and albite granite (AG), with subordinate mineralization in the alkali-feldspar aplite dyke (AFA), the amazonite granitic pegmatite …

Columbite SN3: A New Potential Reference Material for …

Columbite-tantalite LA-ICP-MS U-Pb dating is a fast and useful method to determine the age of rare-metal deposits and fingerprint the provenance of columbite-tantalite ore concentrates. Accurate LA-ICP-MS U-Pb dating requires matrix-matched reference materials.

Episodic Nb–Ta mineralisation in South China: Constraints …

Columbite-tantalite (CGM) ore, which represents a major source of Nb and Ta, can be dated using the U–Pb system (Romer and Lehmann, 1995, Romer and Smeds, 1994, Romer and Wright, 1992, Smith et al., 2004). ... South China comprises the Cathaysian and Yangtze blocks and is located between the Qinling–Dabie Orogenic Belt …

U-Pb isotopic dating of columbite-tantalite minerals: Development of

The highly radiogenic Pb isotopic compositions allow for direct dating of these ore minerals. Columbite-tantalite U-Pb dating by isotope dilution thermal ionization mass-spectrometry ... ID-TIMS concordia diagrams for six samples of columbite-tantalites from Rwanda, China and France. (A) Four fragments from the Rongi ferrocolumbite sample …

Tantalum (Ta) [Z = 73]

The primary ore of tantalum is the columbite-tantalite group. The columbite group is a solid solution with varying proportions of Nb or Ta in its composition. According to the International Mineralogical Association (IMA), 'tantalite' or 'coltan' are not scientific names, yet they are widely used.

Mineralogy of columbite-group minerals from the rare …

Semantic Scholar extracted view of "Mineralogy of columbite-group minerals from the rare-element pegmatite dykes in the East-Qinling orogen, central China: Implications for formation times and ore genesis" by Qifeng Zhou et al. ... Pb dating is a fast and useful method to determine the age of rare‐metal deposits and fingerprint the provenance ...

Ore Geology Reviews

2. Regional and ore deposit geology. The western Kunlun orogenic belt (WKO) is an accretionary orogenic belt bordered by the Tibetan plateau in the south and the Tarim Basin in the north (Xiao et al., 2003, Xiao et al., 2005, Hu et al., 2015; Fig. 1 a).The tectonic evolution of WKO was closely related to the subduction of the Proto- and Paleo …

Mineralogy of columbite-group minerals from the rare …

Mineralogy of columbite-group minerals from the rare-element pegmatite dykes in the East-Qinling orogen, central China: Implications for formation times and ore …

(PDF) Crustal architectural controls on critical …

columbite-tantalite U-Pb dating: Ore Geology . Reviews, v. 105, p. 71–85, https: ... Mesozoic magmatic rocks, and various ore deposit distributions in South China, we processed large-scale ...

Mineralogy of columbite-group minerals from the rare

Request PDF | Mineralogy of columbite-group minerals from the rare-element pegmatite dykes in the East-Qinling orogen, Central China: Implications for formation times and ore genesis | The East ...

Episodic Nb–Ta mineralisation in South China

23 Columbite-tantalite ages from 14 Nb–Ta deposits in South China were reported. • Five distinct Nb–Ta mineralisation events (424–391, 248–204, 160–150, ∼130, and ∼90 Ma) in South China were revealed.

Geochronology of the Chakabeishan Li–(Be) rare-element …

Semantic Scholar extracted view of "Geochronology of the Chakabeishan Li–(Be) rare-element pegmatite, Zongwulong orogenic belt, northwest China: Constraints from columbite–tantalite U–Pb and muscovite–lepidolite 40Ar/39Ar dating" by …

Ultrastructure of a Columbite-Tantalite Mineral from the

The formation of columbite-group mineral phases in peraluminous granite has not been demonstrated to date. Here, a nanoscale study of the columbite-tantalite mineral in the Zhaojinggou Nb-Ta deposit in North China Craton elucidated its formation mechanism and the role of fluids in Nb-Ta mineralization. Transmission electron …

Formation of columbite and microlite after alteration of …

Request PDF | Formation of columbite and microlite after alteration of Nb- and Ta-bearing biotite from the Lizaizhai pegmatite (Guangning ore district, Guangdong, South China): Identification of a ...