...Alice Taddei; Paola Bonazzi; Hans-Jürgen Förster; Patrick Casey; Dan Holtstam; Andreas Karlsson; Luca Bindi Abstract A study of a skarn sample from the Malmkärra iron mines, Norberg, Västmanland (Sweden), revealed the occurrence of a peculiar epidote-supergroup mineral. It was examined using...

...V.V. Pustylnikova; V.A. Muftakhov; A.N. Obukhov; A.M. Kirsanov Lithological studies of sedimentary rocks are often challenged by manifestations of the superimposed processes which are related neither to the stages of lithogenesis, nor to its zonality/direction. This can be exemplified by skarns...

... = 3, and V = 1152.771(7.554) Å 3 . Ehrigite occurs as sub-100-micron-sized grains in hedenbergite skarn from the abandoned Good Hope gold mine, Hedley district, British Columbia, Canada. The mineral and name have been approved by the IMA Commission on New Minerals and Mineral Nomenclature (proposal...

... mineralization, as exemplified by the Bozymchak Cu-Au skarn deposit in the Chatkal-Kurama arc of Kyrgyzstan, West Tianshan. The Bozymchak intrusion associated with the mineralization comprises monzonite porphyry and granodiorite porphyry. A sensitive high-resolution ion microprobe zircon U-Pb age of 305 ± 2 Ma...

... have provided favorable conditions for porphyry mineralization. However, conflicting geodynamic processes have been proposed, and their mineralization potential is unclear. Here, we report the newly discovered Banongzuosi porphyry-skarn Mo-Cu deposit and Qielong skarn Cu-Au and Rongqing porphyry-quartz...

... (aeschynite, 342–1,006 ppm U). In combination with the deposit geology and petrographic observations, these ages link the Nb mineralization to ~270 Ma granites. As these granites are not particularly rich in Nb, skarn formation during granite emplacement is interpreted to have remobilized the existing Nb...

... and skarn Cu ± Au (150–135 Ma) and IOA deposits (~130 Ma) that formed in transpressional and transtensional settings in the Middle-Lower Yangtze River metallogenic belt, China. Our estimates show that, compared to IOA deposits, the porphyry- and skarn-related magmas were relatively felsic, cooler, and more...

...Yongmei Zhang; Xuexiang Gu; Ting Li; Guang Fan; Yingshuai Zhang; Tao Wang; Jialin Wang Abstract Magnesio-ferri-hornblende, ideally ☐Ca 2 (Mg 4 Fe 3+ )[(Si 7 Al)O 22 ](OH) 2 , is a new mineral of the amphibole supergroup from the Husite granitic complex related to skarn-type Fe-Cu mineralization...

... aureoles demonstrate similar coupled δ 18 O–δ 13 C decreasing trends from the field of marine limestone, to the protolith/marble transition (Δδ 18 O –18 to –10‰ and Δδ 13 C –16 to –5‰), and on to zones of metasomatism, skarn, and vein mineralization. These patterns imply phase transformations involving...

...YunHao Ji; GuiQing Xie; Rolf L. Romer; Wei Li; QiaoQiao Zhu; Bin Fu Abstract Scheelite (CaWO 4 ) is an economically important W mineral in skarns that form when magmatic fluids exsolved from a granitic intrusion react with carbonate wall rocks. In the Fujiashan W skarn deposit, scheelite formed...

...Hegen Ouyang; John Caulfield; Guiqing Xie; Chao Duan; Jingwen Mao; Xin Li Abstract Most known copper (Cu) skarns are associated with oxidized intrusions. In this contribution, we report a Cu skarn associated with a reduced monzodioritic intrusion at Huanren, northeastern China, which contains 0.41...

... stockworks, magmatic-hydrothermal breccias, vuggy residual quartz or vein systems in telescoped lithocaps, proximal skarns, carbonate-replacement mantos and pipes, low-permeability barriers, and reactive mafic host rocks—either alone or in various combinations—are identified as particularly favorable...

...Lijie Liu; Taofa Zhou; Bin Fu; Trevor R. Ireland; Dayu Zhang; Guangxian Liu; Feng Yuan; Xiangping Zha; Noel C. White Abstract Diverse fluid sources and complex fluid flow paths in skarn systems appear to be well documented. Nevertheless, in situ microanalysis of oxygen isotopes by secondary ion...

... to ore-forming processes that are distinct for different ore deposit types. Hence the trace-element compositions of magnetite can be used to characterise a particular ore type (e.g. magnetite-bearing ore deposits including Ni–Cu–PGE, banded iron formation (BIF), iron oxide–Cu–Au (IOCG), skarn, porphyry...

...Raúl Lira; María J. Espeche; Natalia A. Bonadeo; Michael J. Dorais Abstract Helvine [Be 3 Mn 2+ 4 (SiO 4 ) 3 S] occurs in less than one meter-sized spotty concentrations in some calcic skarns of Córdoba province, Argentina. The local geology, mineral chemistry, paragenetic mineral associations...

...Shahrokh Rajabpour; Shohreh Hassanpour; Shao-Yong Jiang Abstract The Mazraeh Cu skarn deposit, NW Iran, is situated at the lithological contact between an Oligo–Miocene granodiorite and Cretaceous limestones. The causative granodiorite has I-type medium- to high-K calc-alkaline composition...

... of the apatite supergroup. It occurs in skarn from the Malmkärra iron mine, Norberg, Västmanland (one of the Bastnäs-type deposits in Sweden), associated with calcite, dolomite, magnetite, lizardite, talc, fluorite, baryte, scheelite, gadolinite-(Nd) and other REE minerals. Fluorbritholite-(Nd) forms anhedral...

... magmatic skarn that contains several small, cm- to dm-scale, calc-silicate fragments displaying the same peak assemblage as the main xenolith, as well as a dm-scale chromitite autolith and mm- to dm-scale lenses and stringer-like masses of fine-grained uvarovite. The skarn matrix is mineralogically zoned...

.... Melt inclusions in endoskarn from the Chating Cu-Au deposit in eastern China reveal that the calc-silicate assemblage (diopside + andradite ± wollastonite ± epidote) was molten at the time of skarn formation and coexisted with CO 2 vapor as well as sulfate- and chloride-salt melts. Hence, we argue...

... ( N ) and spinel ( S ) modules. Both phases have been discovered in the Xianghualing skarn, Hunan Province, China. Zinconigerite-2 N 1 S (zn-2 N 1 S ) and zinconigerite-6 N 6 S (zn-6 N 6 S ) are named for their chemical composition, number, and ratios of N-S modules, according to the nomenclature...