 | | Journal (article/letter/editorial) | | THE PARAGENESIS OF THE WALDEN PEGMATITE, PORTLAND, CONNECTICUT (PART III) (Continued from last issue)...in soda-lithium pegmatite is generally much less abundant than the cleavelandite and lepidolite save in...very late formed euhedral crystals of albite, lepidolite, colored tourmaline, beryl, apatite, topaz, fluorite...deposition of the minerals in the lithium replacement body in the Walden pegmatite appears to be: first, caesium...manganapatite; microlite; very minor amounts of cassiter- Lepidolite Icm-sh"aped growth inter-grown with c/eavelandite |  | | Journal (article/letter/editorial) | | VOL 50, TANUARY FEBRUARY, 1965 THE CHIEF LITHIUM PEGMATITE, DEVILS HOLE, FREMONT COUNTY, COLORADO1 E...north of the well-known Devils Hote (lingneim) pegmatite (Hanley et aI.,1950).The depositlies approximatelr...area as early as 1956. The Chief pegmatite was exploredfor lithium and berl,llium in the 1ate 1950'sby...Ann Arbor, Michigan. PEGMATITE CILIEF LITIIIUM 97 tooo Ft l CH]EF PEGMATITE I I \,, /" To Texos...location of the Chief pegmatite. GsuBn.tr Gnor-ocv In the vicinity of the pegmatite the countrl' rocks |  | | Journal (article/letter/editorial) | | green tourmaline crystal in quartz. A Lithium-Bearing Pegmatite in the Clear Creek District, CLEAR CREEK...pegmatites are known to contain lithium minerals. Recently a lithiumbearing pegmatite has been rediscovered in...the Clear Creek district on the east flank of Mt. Evans. This pegmatite, the Bald Mountain tourmaline prospect...tourmaline in quartz, as well as fine-grained lepidolite. History Boos (1954) first noted the occurrence...of the pegmatite occur at the road cut. Mineral enthusiasts should be aware that the pegmatite is located |  | | Journal (article/letter/editorial) | | THE PARAGENESIS OF THE WALDEN PEGMATITE, PORTLAND, CONNECTICUT (PART ONE) By DAVID M. SEAMAN American...applicable to the late period of lithium mineralization as noted in many of the lithium pegmatites found within...elsewhere as at Varutrask, Sweden; and at other lithium pegmatite localities outside the United States. Special...the paragenesis of the minerals of the Walden pegmatite since it has been opened up only in recent years...late period minerals found in this complex, lithium pegmatite was readily available. Location The Walden |  | | Journal (article/letter/editorial) | | 1680–1684, 2004 Investigation of polytypes in lepidolite using electron back-scattered diffraction TOSHIHIRO...investigation of polytype occurrence in lepidolite from a lithium pegmatite. 1M, 2M1, and 2M2 polytypes were...etc. deÞnitely show speciÞc polytypes. Lepidolite, a lithium-rich aluminous mica whose general composition...between polytype occurrence and composition in lepidolite by determining the polytypes of about 50 natural...varies in the sequence 2M1 → 2M2 → 1M or 3T as the lithium content increases. He also suggested that a compositional |  | | Journal (article/letter/editorial) | | crusts and euhedral crystals associated with lepidolite, quartz, albite and cookeite. Namibite forms...Nagatare Li-pegmatite INTRODUCTION The first mineralogical report of the Nagatare pegmatite was made by...following year the pegmatite was designated a national monument and named the ʻNagatare Pegmatite Dyke with Lepidoliteʼ...the pegmatite is lithium-rich and was mined for lithium ore during World War II. Excavated lithium ore...ore, mainly composed of lepidolite and elbaite was stockpiled after mining, although there is at present |  | | Journal (article/letter/editorial) | | Engineering and Mining Journal, Vol. 67, 1889. PEGMATITE MINERALS OF MAINE B y D A V I D M. SEAMAN 36 Winter...manganese iron phosphate, has been noted in lithium pegmatite as an alteration of reddingite as octahedral-like...phosphate, has been found as a rare mineral in lithium pegmatite at the Bennett Quarry at Buckfield, the Dun...Mine at Newry in small amounts. LEPIDOLITE, a hydrous potassium, lithium, and aluminum silicate with fluorine...hydorxyl, is the characteristic mica found in the lithium replacement zones near the center or in the core |  | | Journal (article/letter/editorial) | | 3749/canmin.AB00026 THE ARCHEAN MT. CATTLIN SPODUMENE PEGMATITE GROUP AND 3D GEOCHEMICAL MAPPING OF LARGE ‘‘UNZONED’’...spodumene, Yilgarn Craton, LCT pegmatite, 3D geochemical modelling, Archean, lithium. INTRODUCTION MORPHOLOGY...MORPHOLOGY The Mt. Cattlin spodumene pegmatite group is located on the southernmost edge of the Archean Yilgarn...pegmatites are currently being mined as a source of lithium, from spodumene ore. They contain a global resource...INTERNAL STRUCTURE AND MINERALOGY The Mt. Cattlin pegmatite group shows petrological characteristics and internal |  | | Journal (article/letter/editorial) | | situ mapping and textural interpretation of lithium in pegmatite minerals Marcus T. Sweetapple1,* and Steven...analysis of light elements (Z < 10), including lithium. This relatively inexpensive analytical tool provides...spodumene from the Neoarchaean Mt. Cattlin lithium pegmatite deposit. Spodumene (LiAlSi2O6) is the ore...ore mineral in this deposit, but lithium is distributed in variety of minerals including primary micas and...without further preparation. Results from mapping of lithium in these samples effectively discriminated between |  | | Journal (article/letter/editorial) | | a l s o prominent within the Mozambique belt in East Africa. Mozambique and Madagascar and within the...belt. Another characteristic. lithiumbearing pegmatite procince is lound in the basement rocks o f Zimbabwe...the most important mineral mined in the past, lithium, rare-earths. tin. niobium-tiintalum, and uranium...Cassiterite 1. Introduction Although the major granite pegmatite regions of Africa have been known for a long time...demand. The present study reviews the principal pegmatite regions in Africa, where extensive mining of minerals |  | | Journal (article/letter/editorial) | | PEGMATITE MINERALS OF THE UNITED STATES DAVID M. SEAMAN American Museum of Natural History, New York...is known as schorl. The colored tourmalines or lithium tourmalines are rubellite, the pink or red variety;...found most commonly in pockets or cavities in the lithium pegmatites. Some of these cavities or pockets have...found in all types of pegmatite from the common granite type to the lithium pegmatite. Many localities have...diameter have been noted in the School Section pegmatite of Fremont county, Colorado. ROCKS AND MINERALS |  | | Journal (article/letter/editorial) | | Lithium mineralization in Norway: a review Roy Kristiansen Postboks 32, N-1650 Sellebakk, Norway (mykosof@online...Introduction Today lithium comprises 118 minerals world-wide containing essential lithium (Grew et al. 2018)...of lithium appear to be particularly rare in Norway". However, he pointed out that a real lithium mica...micas from Høydalen and found a reddish violet lepidolite with 5.0 % Li2O (Oftedal 1943). Oftedal (1950)...multi-colored Li-tourmalines and spodumene from a pegmatite at Ågskardet in Holandsfjord, Nordland. Frigstad |  | | Journal (article/letter/editorial) | | gates after you. This quarry is the newest of the lithium pegmatites to be opened up in Connecticut and anyone...species of minerals only present in this type of pegmatite. The quarry was opened up early in 1962 by two...its salts. Caesium also occurs quite commonly in lithium pegmatites as an impurity in caesium beryl and...and also along with rubidium in some lepidolite from which ROCKS AND MINERALS they are recovered. Rubidium...tubes, and other electronic equipment. The Walden pegmatite appears to be located along the contact of the |  | | Journal (article/letter/editorial) | | n n w a l d i t e ,a n d t a e n i o l i t e Lepidolite, including polylithionite Distribution of rare...Determinations are given of all of the alkalies (lithium, sodium, potassium, rubidium, and cesiurn) in 43...phlogopite, vermiculite, zinnwaldite, taeniolite, lepidolite, and polylithionite. The geologic occurrence...hydrothermal replacement in pegmatites is shown. Lithium was found to be present in ail the micas analyzed...on the geologic occurrence of the rare alkalies-lithium, rubidium, and cesium. Some micas, particularly |  | | Journal (article/letter/editorial) | | Pegmatite Minerals of the United States David M . Seaman American Museum of Natural History, N e w Y...often makes up the greater bulk of the mass of pegmatite material. Many masses are found in the cores in...very rare in pegmatite but chalcedony occurs in veinlets in the Colfeco no. 12 pegmatite of the Eight...surfaces and coats cracks or fills seams in the pegmatite. It is often fluorescent, in a light green color...PETALITE a lithium and aluminum silicate, occurs most commonly as a rare mineral in lithium pegmatites |  | | Journal (article/letter/editorial) | | THE PARAGENESIS OF THE WALDEN PEGMATITE, PORTLAND, CONNECTICUT (PART II) (Continued from last issue)...crystallizing mass of pegmatite in the lithium replacement body in the Walden pegmatite. It envolved the rubellite...deposited very late in the paragenetic sequence in the lithium replacement lense after the deposition of the caesium...in the center of the late lithium replacement body of the Walden pegmatite in broad, lath-like, euhedral...are the largest euhedral crystals found in this pegmatite and are tightly intergrown with or embedded in |  | | Journal (article/letter/editorial) | | GEOLOGICALJOURNAL, VOL. 26,295-305 (1991) Genesis of lithium pegmatites from the Leinster Granite Margin, southeast...Ireland Extensive and economically-important lithium pegmatites have been described from the eastern...batholith. All the known bedrock occurrences of lithium pegmatite are contained within this marginal deformation...previous studies have suggested derivation of the lithium pegmatites by fractionation from the Leinster Granite...granitoids in an attempt to resolve the problem of pegmatite genesis. The results suggest a strong geochemical |  | | Journal (article/letter/editorial) | | Arbor, Michigan. Ansrnecr The Brown Derby No. 1 pegmatite, of Gunnison County, Colorado, contains a highly...muscovite, sericite, and five major varieties of lepidolite. Each of the micas was formed in a unit of characteristic...elements with respect to their positions in the pegmatite and probably with respect to relative time of...replacement layers formed by reactions between zonal pegmatite rock and deuteric, residual pegmatitic fluids...the Quartz Creek pegmatite district, is well exposedon the upper slopesof the east side of Quartz Creek |  | | Journal (article/letter/editorial) | | and amblygonite in an Li–Cs–Ta enriched (LCT) pegmatite from Nagatare, Fukuoka Prefecture, Japan, contain...wardite, viitaniemiite, morinite, muscovite, lepidolite, and cookeite. They are associated with lacroixite...secondary phosphates during the late stages of pegmatite formation has been recorded at several locations...series minerals were first described from an LCT pegmatite in Nagatare, Fukuoka Prefecture. Descriptions...reinvestigating the minerals of the Nagatare pegmatite including lepdoi:10.2465/jmps.131022d Y. Shirose |  | | Journal (article/letter/editorial) | | 1, pp. 27-38, CHEMICAL STUDIES THE OF LITHIUM PEGMATITE OKAYAMA YASUO UKAI, DEC., 1956 MICAS...compositions of lithium micas in a pegmatite at Minagi, Okayama Prefecture, were studied. This pegmatite consists...muscovite zone, (4) zinnwaldite zone and (4) lepidolite zone, arranged inwards successively. Each zone...and from lithium and that lithium, and in the the magnesium earlier pegmatite cooling the...of the distinctive the mica of biotite pegmatite, concentrated the part forming structure |  | | Journal (article/letter/editorial) | | 458 Simpsonite and stibiotantalite from Benson pegmatite mine, Mtoko, Southern Rhodesia. By O. vox KNORRIXG...simpsonite and stibiotantalite is described from a lithium pegmatite at Mtoko, Southern Rhodesia. Optical, chemical...Simpsonite has been previously described from four pegmatite areas only: Tabba Tabba in Western Australia (Bowley...suite of minerals typical of other important pegmatite fields in Southern Rhodesia ; this includes amblygonite...crystals in a quartz-biotite pegmatite between a quartz blow and a feldspar pegmatite'. The simpsonite from |  | | Journal (article/letter/editorial) | | Paragenesis of the Varutrask Pegmatite 49 The Paragenesis of the Varutrask Pegmatite By PERCY QUENSEL ABSTRACT...presented on the paragenesis of the Varutrask pegmatite, situated about 10 km. from Skelleftea, in Sweden...during which the primary zonal development of the pegmatite body into border zone, wall zone, intermediate...stage of supergene alteration. The age of the pegmatite lies between 1650 and 1800 million years. URING...the common title " Minerals of the Varutrask Pegmatite " was published by members of the staff of the |  | Wang, R. C., Hu, H., Zhang, A. C., Huang, X. L., Ni, P. (2004) POLLUCITE AND THE CESIUM-DOMINANT ANALOGUE OF POLYLITHIONITE AS EXPRESSIONS OF EXTREME Cs ENRICHMENT IN THE YICHUN TOPAZ LEPIDOLITE GRANITE, SOUTHERN CHINA. The Canadian Mineralogist, 42 (3) 883-896 doi:10.2113/gscanmin.42.3.883 | Journal (article/letter/editorial) | | OF EXTREME Cs ENRICHMENT IN THE YICHUN TOPAZ–LEPIDOLITE GRANITE, SOUTHERN CHINA RU CHENG WANG, HUAN HU...Republic of China ABSTRACT The Yichun topaz–lepidolite granite is the youngest and most evolved unit...replacement zones typify the rim of lepidolite flakes in the groundmass. Lepidolite may contain up to 25.8 wt%...Cs2O, or ~0.9 Cs apfu (based on O = 11). Such lepidolite may be considered a Cs-dominant analogue of polylithionite...mineral of cesium, commonly found in evolved pegmatite rocks. Furthermore, nanpingite, the Cs analogue |  | | Journal (article/letter/editorial) | | THE ELBAITE SUBTYPE OF RARE-ELEMENT GRANITIC PEGMATITE T. SCOTT ERCIT§ Canadian Museum of Nature, P.O...the elbaite subtype of rare-element granitic pegmatite has been encountered within the O’Grady batholith...granite and felsitic satellite dykes. On the whole, pegmatite bodies show a mildly NYF-type geochemical and...(elbaite-bearing). The melts parental to the pegmatite bodies were more voluminous, more alkaline, less...than is the norm for melts parental to LCT-type pegmatite. Differentiation of these melts sequentially produced |  | | Journal (article/letter/editorial) | | 1959, pp. 1525-1542 GEOLOGY OF TIlE MONTGARY PEGMATITE R. W. HUTCHINSON CONTENTS PAGE Abstract ............................................. 1534 Lepidolite-albiteassemblage...............................valuable mineralsincluding spodumene, amblygonite, lepidolite,zinnwaldite,poiluciteand beryl. The distributionof...landite-lithia micas-quartz, quartzamblygonite, albite,lepidolite, poilucite, andquartzassemblages. The occurrence...replacingsolutionsmay be unmixing of soda and the rarer alkalis (lithium, rubidium, caesium) from earlier-formed silicates |
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