The flaky minerals give the rock type in question a phyllite-likeappearance, and is, in fact, a phyllonite. (1997): Mineralium Deposita 32, 410-418. North China Geological Exploration Bureau, Geological Brigade 514 (2010): Report on the geological investigation of the Donggou iron deposit, Damiao town, Shuangluan District, Chengde Prefecture, Hebei Province, 51 pp. Plagioclase feldspars are between Ab and An. (1910) The Cobalt-Nickel Arsenides and Silver Deposits of Temiskaming (Cobalt and Adjacent Areas). Chapter Tbree 3.1 Position of 2" Order Sky Blue interference on a Michel-Levy 33 Saussuritization, process by which calcium-bearing plagioclase feldspar is altered to a characteristic assemblage of minerals called saussurite; the typical assemblage formed includes zoisite, chlorite, amphibole, and carbonates. 19, pt.2, p. 52. Saussurite is a mineral aggregate which is formed as a hydrothermal alteration product of plagioclase feldspar.It was named after the Swiss explorer Horace Benedict de Saussure, who discovered it on the slopes of Mont Blanc. (1997): Mineralium Deposita 32, 133-148. Alex Strekeisen - I vetrini della mia fantasia. Other readers will always be interested in your opinion of the books you've read. photo of: Rodolfo Carosi (University of Torino). (2008): Geology of Ore Deposits 50(3), 199-217. Yitian Wang, Jingwen Mao, Wen Chen, Fuquan Yang, and Jianmin Yang (2006): Acta Petrologica Sinica 22(1), 236-244, Junchen Yang, Yun Deng, Yifeng Meng, and Tianfu Li (1998): Geology and Prospecting 34(2), 19-22, Weixuan Fang, Jie Xu, Zhengtao Liu, and Guoduan Xu (2003): Geology and Prospecting 39(6), 18-20, Rui Wang and Yongfeng Zhu (2010): Mineral Deposits 29(2), 229-242, Haiyang Zou, Tagen Dai, and Xiangzhao Hu (2002): Mineral Deposits 21(suppl. Page generated: January 19, 2021 15:01:15, Allalin glacier, Allalin area, Saas-Almagell, Visp, Valais, Switzerland, Oroya Brownhill Gold Mine (Brownhill lease; Oroya Block North; Oroya Block South), Taoshan Uranium ore field (Liueryilin Uranium ore field; Uranium ore field No. The "color index" of figure 1 is Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. Let us know if you have suggestions to improve this article (requires login). Zoisite thin section photomicrographs are taken in plane-polarized light and cross-polarized light, and can easily be recognized under the microscope. Pan-African Damara Sequence,Brandberg. Miller, Willet G. (1910): The Cobalt-Nickel Arsenides and Silver Deposits of Temiskaming (Cobalt and Adjacent Areas); Ontario Bureau of Mines, Vol. (1965) The geology of the South Shetland Islands: III. Sharp, W.E. It is distinguishable from epidote in thin section by optic sign. 5%) olivine (Ol), which has been completely serpentinized. Bibliography • Cox et al. Darhan Muminggan United Banner (Da'erhan Maoming'an Lianheqi; Damaoqi), Haixi Mongol and Tibetan Autonomous Prefecture, Garzê Autonomous Prefecture (Ganzi Autonomous Prefecture), Bayin'gholin Autonomous Prefecture (Bayingolin Autonomous Prefecture; Bayinguoleng Autonomous Prefecture), Hami Prefecture (Kumul Prefecture; Qumul Prefecture), Tulufan Prefecture (Turfan Prefecture; Turpan Prefecture), Yili Hasake Autonomous Prefecture (Ili Kazakh Autonomous Prefecture), Tacheng Prefecture (Tarbaghatay Prefecture), Sartohay (Sartokay; Sartuohai; Saertuohai), Chiredzi mining district (Hartley mining district). From "university of Cape Town". It is typically almost colorless in thin section, but some lawsonite is pleochroic from … Sharkov, E. V., Rukieh, M., Ash-Shara, M., Bilal, A., Grokhovskaya, T. L., & Novikov, V. M. (1997). Fengmai Chai, Zhaochong Zhang, Jingwen Mao, Lianhui Dong, Zuoheng Zhang, and Hua Wu (2007): Journal of Asian Earth Sciences (in press). - Indicates mineral may be doubtful at this locality. Memorie della R. Accademia delle Scienze dell'Istituto di Bologna, serie 3, 5, 105-222. Edward Stanford (London), 168 pp. Mineralium Deposita, Vol. Athesia, Bolzano, 204 pp. Monteiro, L.V.S., Xavier, R.P., de Carvalho, E.R., Hitzman, M.W., Johnson, C.A., de Souza Filho, C.R., and Torresi, I. (2000): Mineralium Deposita 35, 109-125.; Econ Geol (1996) 91:1225-1238; Kisters, A. F., Kolb, J., & Meyer, F. M. (1998). Xikun Chen (1987): Mineral Deposits 6(4), 43-52, Baiqi Xian (1986): Mineral Deposits 5(4), 62-70, Yonghong Zhu (2010): Geology and Exploration 46(2), 244-251, Jing Sun, Weihe Du, Dezhong Wang, Jian Li, Guoxin Xu, and Yuchou Han (2009): Acta Geologica Sinica 83(9), 1344-1364. A series by definition must have at least two minerals, which are its end members, or anchor members.Minerals in the … Clinozoisite presents maximum first order colors under cross-polarized light and is mostly colorless in plain polarized light. Clinozoisite is the same as Zoisite but crystallizes in the monoclinic system, which scientifically classifies it as an individual mineral species. Minerals 10, 13. Thesis, 1977. Edward Stanford (London), 168 pp. it was possible to prepare thin sections of the size (24 X 40 mm.) Thin section description: Texture: Vesicular, with 35-40% vesicles--subspherical with minor coalescence and deformation, vitrophyric, intersertal Phenocrysts: 10% olivine , mostly subhedral (few skeletal) no zoning or kink banding present. In thin sections, the garnet amphibolite is composed mainly of hornblende, plagioclase and garnet, less than 1 mm in diameter. Kolb, J., Kisters, A.F.M., Hoernes, S., and Meyer, F.M. (1948), Minerals of Western Australia, Vol 3, pp 117, 1948. The saussurite-gabbros are green to greenish-black speckled rocks of very variable size of grain, which is dependent upon the amount of shearing they have suffered. Printed privately, Los Angeles, California: 4; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 360. Alex Strekeisen - I vetrini della mia fantasia. There are no feldspars that are intermediate in composition between K (Or) an… 2, pp 125-136. ⓘ - Click for further information on this occurrence. Residual fluids present during the late stages of magmatic crystallization can react with previously formed plagioclase feldspar to form saussurite; the saussurite will be spread through the plagioclase or located near its outer margin. 3) Plagioclas… Thin veins of serpentine often show in the latter; and films of the same not seldom coat joint-faces. Wepf Verlag, Basel, pages 261-262. and amphibole in thin section. Plagioclase is completely altered to saussurite (hydrogrossular, pecto-lite, chlorite, and others; Fig. Minéral. Wydawnictwa Geologiczne, Warszawa, 791 pages [in Polish]. A. Darimont et al., Bull. Corrections? Omissions? (2010), Dimension Stone in Western Australia, Vol 2, Mineral Resources Bulletin 24, Dept of Mines and Petroleum, State Government of Western Australia, 2010, Fetherston, J.M. Doleritic Dyke. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Named in 1806 by Nicolas Théodore de Saussure in honor of Horace Benédict de Saussure who originally described the material as "jade". Geology of Ore Deposits C/c of Geologiia Rudnykh Mestorozhdenii, 39, 371-381. ? , 1988, 111, pp. Phenocrysts of feldspar and pyroxene are present but rare. Lis, J., Sylwestrzak, H. (1986) Minerały Dolnego Śląska [Minerals of the Lower Silesia]. Percent abundance of plagioclase and saussurite in Matachewan dykes, with distance fiom the Sudbury Basin . White, A.J.R. Analcime di Castelluccio di Capugnano presso Porretta. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. Les termes basiques, ultrabasiques et carbonatés". It forms transparent to translucent colorless, white, and bluish to pinkish grey glassy to greasy crystals. 2680-2660 Ma lode-gold mineralization at Jundee-Nimary in the Yilgarn Craton, Western Australia. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. In figure 2 "plagio-clase" includes pseudomorphous replace-ments of that mineral, shown separately in table 1. (TL) - Type Locality for a valid mineral species. Allanite typically occurs as an accessory mineral in felsic igneous rocks, granitic pegmatites, volcanic rocks, and metamorphic systems, among others. The common varieties are tschermakiticand magnesio- and ferro-hornblende. Igneous rocks with similar composition are basalt (extrusive equivalent of gabbro) and diabase (the same rock type could be named dolerite or microgabbro instead).. Gabbro with large augite phenocrysts embedded in white plagioclase. Moorhouse W. W. (1942) The Northeastern Portion of The Timagami Lake Area, Fifty - First Annual Report Of The Ontario Department Of Mines, ARV 51, Pt. Plagioclase microlites as laths about 0.2 millimeter in length make up the main crystalline part of … TABLE OF CONTENTS: Some Fundamental Properties of Minerals in Thin Section: Relief ; Cleavage ; Absorption and Pleochroism ; Extinction Angle ; Twinning ; Interference Colours of a Quartz Wedge now used for modal analysis in this laboratory. Henning, A., van der Westhuizen, W.A., de Bruiyn, H., and Beukes, G.J. Below is presented a resume of the main aspects related to the physical and geomechanical behaviour of the carbonates.. Calcarenites (PL) consists of medium- to coarse-grained massive calcareous arenite. Economic Geology, 93(5), 587-601. (2001) Geological setting and SHRIMP U-Pb geochronological evidence for ca. Occurrence: Commonly present in subduction zones and along contacts of Ca-rich and Al-rich rocks. (1868): The Mineralogist's Directory. Pale dull greenish hornblende is found near the margin of the chromitite pod. Miller, Willet G. (1910): The Cobalt-Nickel Arsenides and Silver Deposits of Temiskaming (Cobalt and Adjacent Areas); Ontario Bureau of Mines, Vol. This section is currently hidden. Digitized image of a thin section from the CPZ (c. 8 m), showing how the sector-zoned clinopyroxene (Sz-cpx) defines ‘trains’. A modal analysis based on a count of 1500 points was made for each slide. 6210), Kalatongke Mine (Kalatunk Mine; Karatungk Mine), Ashele Cu-Zn deposit (Ashelei Cu-Zn deposit). Minerals of Virginia, 1990 by R. V. Dietrich. On microscopic examination it proves to be a felspar basalt,—the plagioclase being, as a rule, clear, though with polarized light dull in colour, the augite little changed, and dull green spots replacing probably the olivine. In thin section the texture is intersertal; there are patches where there is sufficient alignment of feldspar microlites to suggest pliotaxitic texture. ; Collins, J.H. 2526, 2527, 2528, 2530, 2544). Thin section description of all rocks under study was performed by Ilambwetsi (2015) and allowed the recognition of important microscopic features such as fabric, structures, mineralogy etc. (1979): The Interpretation of Igneous Rocks, George Allen and Unwin, London. Observations in thin sections show that the chlorite–amphibole coronas develop before the iddingsite alteration. R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993). 4). (1959) Minerals from Los Angeles County, California. Jun Gao and Yinliang Cui (2004): Geology and Prospecting 40(5), 33-38, Geological Survey of Finland 2010 Kuusijärvi - PGE Database. CIPWnormative compositions indicate that the granitoids have compositions similar to monzogranite (Fig. Miller, W.G. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), 108 pp. Thin section from Löwenburg (Siebengebirge), Germany. Later hydrothermal alteration can produce the same result. Precious metals of the Bassit ophiolite complex (northwestern Syria): Contents and prospects. Thin Section Description: Texture: Porphyritic. This is always accompanied by saussurite in plagioclase. A group of minerals that have an identical crystal structure, where the only difference between them is the elements contained in their crystal structure. It also occurs in saussurite alteration of plagioclase. Quick NavTop About Saussurite Other Languages Other Information Saussurite in petrology Internet Links Localities Locality List Mineral and/or Locality Mindat.org is an outreach project of the Hudson Institute of Mineralogy , a 501(c)(3) not-for-profit organization. less corundum, spinel, magnetite, saussurite, chlorite and tourmaline (Leake and Skirrow 1960). These buff yellow lenses range in longest dimension from 30–350mm. Bombicci, L. (1869) Notizie di mineralogia italiana. One thin section was prepared from each sample and stained for plagioclase and potassium feldspar according to the method of Baily and Stevens (I960). Click the. Miller, C. (1970): Contributions to Mineralogy and Petrology 28, 42-56. Ontario Bureau of Mines, Annual Report, Vol. The saussurite is pale green to yellowish green and occurs prin- Some laths of labradorite (An 50-55) are moderately fresh, but most of the feldspar has been altered to saussurite (epidote and clinozoisite), calcite, albite and natrolite. Brekkefjell were examined in thin sections. ; Hall, T.M. Gurbanov, A.G., Bogatikov, O.A., Dokuchaev, A.Y., Gazeev, V.M., Abramov, S.S., Groznova, E.O., and Shevchenko, A.V. Barton, C.M. American Mineralogist, vol. (2020) Origin of Talc and Fe-Ti-V Mineralization in the Kletno Deposit (the Śnieżnik Massif, SW Poland). (1868): The Mineralogist's Directory. optically homogeneous in thin section. You can write a book review and share your experiences. Mafic rocks are especially susceptible to saussuritization owing to their high calcium content; the more calcium-rich portions of plagioclase in acidic rocks also are often saussuritized. 20% Phenocrysts: 12% Hornblende, strongly pleochroic from yellow to green-blue, zoned, euhedral, many grains are simply twinned, extinction angle 22 o (2008): Mineralium Deposita 43, 129-159. Yeats, C.J., Kohler, E.A., McNaughton, N.J., Tkatchyk, L.J. Gil, G.; Gunia, P.; Barnes, J.D. 4). Alkali feldspars are compositionally between Or and Ab end-members. Panigrahi, M.K., and Mookherjee, A. (2010), Dimension Stone in Western Australia, Vol 2, Mineral Resources Bulletin 24, Dept of Mines and Petroleum, State Government of Western Australia, 2010, Simpson, E.S. (4) Lizardite alteration of olivine, forming the familiar mesh structure. Our editors will review what you’ve submitted and determine whether to revise the article. Gold mineralization in high-grade metamorphic shear zones of the Renco Mine, southern Zimbabwe. 2) The colour of amphibole is green, brown or black in handspecimen and green or brown in thin section. Beryl - Be 3 Al 2 (Si 6 O 18) The beryl structure contains hexagonal rings of sic SiO4 tetrahedra, with the ring stacked vertically such that the hexad symmetry axis becomes the c crystallographic axis. In a small crag between Brekkefjell and Mysmorbullen folded beds of quartzite occur (Fig. Ring in the new year with a Britannica Membership, This article was most recently revised and updated by, https://www.britannica.com/science/saussuritization. Terenzi A., Meli R., 1988. Figure 7 Gabbro is a coarse-grained and usually dark-colored igneous rock.It is an intrusive rock. Zoisite - Ca 2 Al 3 (SiO 4)(Si 2 O 7)O(OH) Zoisite, first known as saualpite, after its type locality, isa sorosilicate belonging to the epidote group of minerals. Texture of the groundmass is concertal, i.e. Stalder, H.A., Wagner, A., Graeser, S., Stuker, P. (1998): Mineralienlexikon der Schweiz. Saussuritization, process by which calcium-bearing plagioclase feldspar is altered to a characteristic assemblage of minerals called saussurite; the typical assemblage formed includes zoisite, chlorite, amphibole, and carbonates. Fengjun Nie, Shihong Jiang, Yueming Zhao (2001): Mineral Deposits 20(2), 163-173, Xu Dongqing, Jiang Sihong, Zhang Jianhua, Hu Peng, Zhao Yongfa, Wang Yuecheng, and Lai Xinrong (2006): Mineral Deposits 25(3), 231-242, Chao Tang, Junqiang Chen, Xiaoxue Liu, and Zhidan Li (2013): Geology and Exploration 49(2), 224-235, Youbin Liang (1981): Geology and Prospecting 17(12), 18-21, Wenle Zeng, Yuhua He, Liugui Zhang, Yulin Chen, and Weijiang Shao (2010): Geology and Exploration 46(1), 1-9, Huiwen Liu, Xueping Wang, Ji Shao, Kesi Lu, Fanglian Tian, and Shuya Xiong (2014): Mineral Deposits 33(1), 87-103, Chengyou Feng, Dequan Zhang, Daxin Li, and Yanhe Cui (2002): Mineral Deposits 21(1), 45-52, Chuandong Zhao, Hangxin Cheng, Guangmin Zhuang, Yinghan Liu, and Deyou Chen (2005): Geology and Prospecting 41(5), 53-57, Xieyan Song, Meifu Zhou, Zhimin Cao, Min Sun, and Yunliang Wang (2003): Mineralium Deposita 38, 831-843, Tinggao Xia, Chuanmin Sun, and Jianzhong Yin (2005): Geology and Prospecting 41(3), 57-61, Wenjuan Tan, Hanbing Jiang, Hequn Yang, and Yongbao Gao (2011): Geology and Exploration 47(2), 244-250. ), 565-568, Zhongfu Cheng (1990): Geology and Prospecting 26(7), 19-24. Nauk. Please refer to the appropriate style manual or other sources if you have any questions. 5). Abbreviations commonly used are Or (K-feldspar), Ab (albite), An (anorthite). Annual Report, pp. The plagioclase may be reconstituted into a more sodium-rich variety (albite), although the original form of the crystal is retained. 108. British Antarctic Survey Scientific Reports, No.44, 33 pages plus plates. (2007): Geology of Ore Deposits 49(6), 467-486. fetherston, J.M. Plagioclase that has been pseudomorphously altered to zoisite, scapolite and other minerals. 30-31. Hall, T.M. In thin section cataclastic effects are shown in all specimens, while occasionally bands of rock (No. (FRL) - First Recorded Locality for everything else (eg varieties). Seconda parte. 321-330. Chromian spinel in chromitite usually has numer-ous circular inclusions mainly composed of … The lighter grey is the gabbroic matrix (G), consisting of cumulus clinopyroxene (þlow-Ca pigeonite), interstitial plagio- clase and minor (<5%) Fe–Ti oxides; the matrix also includes minor (c. 5%) olivine (Ol), which has been completely serpenti- nized. with notched or serrated boundaries between grains. You should always treat mineral specimens with care. Prace Mineralogiczne Kom. ; Szymański, M.; Jokubauskas, P.; Kalbarczyk-Gil, A.; Bagiński, B. La miniera cuprifera di Montecatini in Val di Cecina (PI) Rivista Mineralogica Italiana, 12 (1): 19-26, Heflik W., Zabinski W. 1970 - A study of saussuritized gabbro from Słupiec (Lower Silesia). Shock effects include PF and sets of PDF in quartz and plagioclase, transformation of the phenocrysts into diaplectic glass, and remelting of the matrix. Collins, J.H. ‘Or’ is an abbreviation of a common K-feldspar orthoclase, but sometimes it is used as a symbol of all the alkali feldspars. A distinct recrystallization is visible with the formation of quartz, sericite and chlorite (Fig. XIX, pt.II, 279 pages, at p. 52. Home Atlas of Minerals in thin section In thin section, smaller (mm size) lithic fragments are revealed as volcanic particles, such as tuff, ignimbrite, andesite, and basalt. Results of the analyses are shown in table 1 and summa-rized in figures 1 and 2. Sharkov, E.V., Abramov, S.S., Simonov, V.A., Krinov, D.I., Skolotnev, S.G., Bel’tenev, V.E., and Bortnikov, N.S. Distinguishable from epidote in thin section by optic sign, lower birefringence, and absence of green color. Some plagioclase became saussurite. Typically, in regionally metamorphosed igneous and sedimentary rocks. 4a). Zhou, M.-F., Robinson, P.T., Malpas, J., Sun, M., Aitchison, J., Bai, W.J., Hu, X.-F., and Yang, J.-S. (2001): Journal of Asian Earth Sciences 19(4), 517-534. The oligoclase cores of plagioclase crystals are commonly altered to white mica and saussurite.The Wyangala Granite also contains metasedimentary xenoliths and microgranitoid enclaves. 49, 883-888. It means that it formed as magma cooled slowly in the crust. The rocks recovered at Site 1114 can be classified as one lithologic unit referred to as a brecciated metadolerite. This alteration takes place below 500°C and … Click on the. (Nos. Clinozoisite is also almost identical in composition to Epidote but lacks significant iron in its structure.It forms a series with Epidote, and in many cases the actual distinction between these two minerals cannot be made. B; Lasnier : "Persistance d'une série granulitique au coeur du Massif Central Français - Haut-Allier. 36, No. Memorie della R. Accademia delle Scienze dell'Istituto di Bologna, serie 2, 9, 71-72; Bombicci, L. (1874) Descrizione della mineralogia generale della provincia di Bologna. The lower birefringence, and also absence of green color. Refractive indices are nα=1.665, nβ=1.672 – 1.676, and nγ=1.684 – 1.686. In this section, we are mainly interested in the mineral allanite, characterized by the presence of light Ln elements and Th on the A-sites together with Al, Fe 3+, Fe 2+, and Mg on the M-sites. No information on health risks for this material has been entered into the database. Updates? 2528) have become completely recrystallised. The Stratigraphy of King George Island. 6, Pg 9. However, because the granitoids are coarse-grained and, porphyritic, and only one thin section per sample was counted, the counts were biased towards compositions dominated by the coarse-grained minerals, especially microcline. Some of these rock fragments are shocked. The content of amphibole and plagioclase together is mostly higherthan 90%, and may be as low as 75%. Mollai, H., Sharma, R., and Pe-Piper, G. (2009): Ore Geology Reviews 35, 401-414. An examination of fi ve thin sections of xenolith material using transmitted polarised light micros-copy reveals a … The lighter grey is the gabbroic matrix (G), consisting of cumulus clinopyroxene (+low-Ca pigeonite), interstitial plagioclase and minor (<5%) Fe–Ti oxides; the matrix also includes minor ( c . The Amphibolite classification is based on the followingstatements: 1) The modal compositions of amphibolites show that most ofthem contain more than 50% of amphibole, but those with 50 to 30% are notunusual. This map shows a selection of localities that have latitude and longitude coordinates recorded. Current server date and time: February 14, 2021 12:18:54 In thin section it appears as a highly altered basalt with intergranular texture. William Phillips (London), 535 pp. Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. (1964) Clinopyroxenes from eclogites and basic granulites. Royal Cornwall Polytechnic Society (1870): 38. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Saussurite. PAN Oddział Krakow T..23. Digitized image of a thin section from the CPZ (c.8m), showing how the sector-zoned clinopyroxene (Sz-cpx) defines ‘trains’. While every effort has been made to follow citation style rules, there may be some discrepancies. megascopic texture. Feldspars include three compositional end-members: K-feldspar (KAlSi3O8), albite (NaAlSi3O8), anorthite (CaAl2Si2O8). The dyke seen in the cliff may be taken as a type of the former. 19, pt.2, p. 54. Kisters, A.F.M., Meyer, F.M., Znamensky, S.E., Seravkin, I.B., Ertl, R.G.W., and Kosarev, A.M. (2000): Mineralium Deposita 35, 157-168. Doleritic Sills, Trio Nunatak, Antarctica.

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