Characteristics of REEs and trace elements in scheelite from the Zhuxi W deposit, South China: Implications for the ore-forming conditions and processes

A 3D Geological Model Constrained by Gravity and Magnetic Inversion and its Exploration Implications for the World‐class Zhuxi Tungsten Deposit, South China

“…The mineralization in the ZTD is mainly hosted by skarn developed in carbonate rocks of the Carboniferous Chuanshan and Huanglong formations, which are in structural contact with the Neoproterozoic Shuangqiaoshan Group (Gp) consisting of phyllite and sandy phyllite (Yuan et al, 2019). The skarn is not limited to the contact zone between carbonates and granite intrusion, but rather extends along the carbonate strata >1 km away from the intrusion, and is surrounded by a marble zone.…”

In Situ Trace Elemental Analyses of Scheelite from the Chuankou Deposit, South China: Implications for Ore Genesis

“…Due to its internal crystal structure, scheelite contains many trace elements such as Sr, Ba, Nb, Ta, REE, Mo, Pb, Th and U which replace W 6+ and Ca 2+ by solid solution [1][2][3][4][5][6]. The substitution mechanisms in scheelite have been widely studied [1,[3][4][5][7][8][9][10][11]. The REE distribution patterns and total REE concentrations in scheelite play an important role for investigating their precipitation processes and ore-forming mechanisms.…”

Geochemistry and Origin of Scheelites from the Xiaoyao Tungsten Skarn Deposit in the Jiangnan Tungsten Belt, SE China

“…The REE patterns in scheelite are highly sensitive to the hydrothermal evolution, making scheelite act as a promising tool to understand prevailing hydrothermal conditions [3,4]. Despite the extensive literature on trace elements in scheelite, only a few studies focus on tungsten skarn deposits [12][13][14][15]. Most tungsten skarn deposits are characterized by multiple scheelite generations which underwent dissolution and re-precipitation processes [16][17][18].…”

“…Thus, the variation in REE and trace elements in scheelite in time and space reflects a complex magmatic-hydrothermal process involving various fluid-rock interactions and fluid mixing.Minerals 2020, 10, 271 2 of 22 (CL) imaging has been proven to be an effective technique to reveal internal textures, zoning and trace element distributions in scheelite [3]. However, previous studies did not evaluate dissolution and re-precipitation processes in scheelite from tungsten skarn deposits due to the changing hydrothermal fluids [13,14]. The detailed textural characterization and systematic investigations of scheelite from each stage prior to in situ chemical analysis are critical to constraint the evolution of skarn systems and W ore precipitation.The Jiangnan tungsten belt in the southeastern margin of the Yangtze Craton is a new giant tungsten province with WO 3 reserves over 5.0 million tons [19][20][21][22][23], including the Dahutang (reserves of 1.10 Mt and grade of 0.18%) and the Zhuxi (reserves of 3.44 Mt and grade of 0.54%) deposits, as well as other large-scale tungsten deposits, such as Yangchuling, Xiaoyao, Dongyuan, Zhuxiling deposits [24][25][26].…”

“…Minerals 2020, 10, 271 2 of 22 (CL) imaging has been proven to be an effective technique to reveal internal textures, zoning and trace element distributions in scheelite [3]. However, previous studies did not evaluate dissolution and re-precipitation processes in scheelite from tungsten skarn deposits due to the changing hydrothermal fluids [13,14]. The detailed textural characterization and systematic investigations of scheelite from each stage prior to in situ chemical analysis are critical to constraint the evolution of skarn systems and W ore precipitation.…”