 | Loun, Jan, Novák, Milan, Cempírek, Jan, Škoda, Radek, Vašinová Galiová, Michaela, Prokeš, Lubomír, Dosbaba, Marek, Čopjaková, Renata (2018) Geochemistry and secondary alterations of microlite from eluvial deposits in the Numbi mining area, South Kivu, Democratic Republic of the Congo. The Canadian Mineralogist, 56 (2) 203-220 doi:10.3749/canmin.1700091 | Journal (article/letter/editorial) | | SECONDARY ALTERATIONS OF MICROLITE FROM ELUVIAL DEPOSITS IN THE NUMBI MINING AREA, SOUTH KIVU, DEMOCRATIC...37 Brno, Czech Republic ABSTRACT Microlite and U-enriched microlite were found in eluvium close to highly...within the ~1000–900 Ma old Kibara belt unit, Numbi mining area, South Kivu province of the Democratic Republic...the Mungwe pegmatite (lepidolite subtype) cassiterite . microlite-group minerals (microlite þ U-enriched...U-enriched microlite) . columbite-group minerals (columbite–tantalite), wodginite þ ferrotapiolite; at the Misumari |  | | Journal (article/letter/editorial) | | February 2015 MINERALS FROM THE HYATT MINE, TALCVILLE, ST. LAWRENCE COUNTY, NEW YORK. S. C. Chamberlain, Department...Zinc Corporation of America operates the new Hyatt mine on an orebody just south of the Oswegatchie River...Talcville in the Town of Edwards, St. Lawrence County, New York. The orebody consists of massive iron-rich...of sepiolite in the form of mountain leather, the mine has not, until recently, produced anything of particular...particular interest to collectors. In early 1994, mining operations encountered cavities lined with crystallized |  | | Book | | nearly all metals and the inevitable closing of many mining operations, it is a matter of the industry's survival...decision, not only is a handy volume affered to the mining and processing community but also duplication of...another oxide, "yttria", from minerals found in the pegmatite at Ytterby, Sweden. Both supposed oxides were...Swedish ehernist Ekeberg in the eourse of analyzing pegmatite minerals from Ytterby, Sweden and Kimito, Finland...minerals from the same loeality, the farnaus pegmatite at Ytterby, Swcden. This faet stresses the geoehemieal |  | Tang, Yong, Zhao, Jing-Yu, Zhang, Hui, Cai, Da-Wei, Lv, Zheng-Hang, Liu, Yun-Long, Zhang, Xin (2017) Precise columbite-(Fe) and zircon U-Pb dating of the Nanping No. 31 pegmatite vein in northeastern Cathaysia Block, SE China. Ore Geology Reviews, 83. 300-311 doi:10.1016/j.oregeorev.2016.10.040 | Journal (article/letter/editorial) | | and zircon U-Pb dating of the Nanping No. 31 pegmatite vein in northeastern Cathaysia Block, SE China...Nanping pegmatite Columbite-(Fe) U-Pb dating Zircon Hf isotope a b s t r a c t The Nanping pegmatite deposit... SE China. Columbite-group minerals from zone I in the Nanping No. 31 pegmatite vein belong to columbite-(Fe)...this pegmatite vein to approximately 387 Ma. Zircon eHf(t) values from the Nanping No. 31 pegmatite range...from 2107 to 2246 Ma, implying that the Nanping pegmatite-forming melts are derived from Paleoproterozoic |  | | Journal (article/letter/editorial) | | include the Big Whopper and Big Mack petalite pegmatite systems which potentially represent the world's...resulted in increased ¯uorine activity (as seen in microlite compositions) and that in situ fractionation of...F. W. Breaks Die wichtigsten Seltene-Element-Pegmatite von Ontario liegen im Gebiet des Separation Lake...zweitgroÈûte LithiumlagerstaÈtte dieses Typs. Die Pegmatite treten in zwei Gangsystemen in der NaÈhe des Separation...BeryllPegmatite, sowie komplexe Pegmatite des Petalit-Subtyps und, untergeordnet, Pegmatite È hnlichkeiten mit dem |  | | Book | | occurs at Trimouns as colorless, pink and pale brown, translucent to transparent, tabular microcrystals...AFRICA widely in Litchfield County, where good crystals were taken from quartz veins in a variety of metamorphic...Litchfield, where a mass of white quartz on a ridge had once been mined for quartz, and large ilmenite masses...ilmenite crystals to 7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment,...region (Brunet, I 977b ). NEW YORK Amity, Orange County. At many isolated collected sites between the towns |  | | Book | | Emeralds and Beryls as 157 Beryl Structure, Space Group and Symmetry Elements, Talismans, 95 159 Emeralds... semi-precious in beryl history of gemstone mining the on papers in of knowledge the many ...considerable deemed to possess, that encouraged mining despite meager yields and the appalling conditions...chambers, There modem they recovered only extremely mining. were posits be equally made to pay in ancient... But if antiquities, so an and scriptions quartz] “it of a to seems only two that be For |  | | Journal (volume) | | De Agostini website at: UK: AUS: SA: NZ: Rose quartz RO Ruby RU www.deagostini.co.uk www.deagostini...the Earth, Editorial and Design by T he Brown Reference Group pie ISBN O 7489 7935 2 NO i 07 04 18 Printed...Mexico. Eight-sided crystals from the Traversella mine, Piedmont, Italy. .&. crystals. It can also be...are often replaced by pyrite. FACT FILE PYRITE Group: Sulphides Crystal system: Cubic Habit: Cubes,...surface . u, tD -·3 se uar Rose quartz is an uncommon form of quartz that is often used in necklaces |
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Brown Derby No. 5 Mine, Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA