DOCSLIB.ORG

THE MAGNESITE DEPOS11's of WASHINGTON Their Occurrence and Technology

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
THE MAGNESITE DEPOS11's of WASHINGTON Their Occurrence and Technology WASHINGTON GEOLOGICAL SUR\ EY HENRY LANDES, State Geologist BULLETIN NO. 25 THE MAGNESITE DEPOS11'S OF WASHINGTON Their Occurrence and Technology By GEORGE E. WHITWELL and ERNEST N. P A'l1TY OLYMPIA FRANK K . LAMBORN ~ P UBLIC PRINTER 1921 BOARD O:H' GEOLOGICAL TRYEY GoYernor Lours F. HART, Olwirma11. , tatc Trea. m·cr C. L. B.,LlrocK, H('cre lary. Pre. i<l e11 t Hirn RY rz:z., 1,1.0. President EnxEt";T 0. H o1.1 .,,:--o. fuxnY L .\XOES, S ta te a,,olooisl. LETTER OF TRANSMITTAL Governor L oui::; F. Hart, Chafrman, and Members of the Board of Geologtcal t:liir·vey: GmnLEMEX : I have the honor to submit herewith a report entitled "The :Magnesite Deposits of Washing­ ton; Their Occurrence and Technolo 0 y ,'' hy George E. Wl1i twell and Ernest N. Patty, with the recommendation that it be printed as Bulletin No. 25 of the Sttr\·ey reports. V Cl'Y respectfully, HENRY LANDES, State Geologist. Univ er. i ty Station, Seattle, January 15, 192]. CONTENTS. Page GEXt:IIAf, STATE,\1 1•: XT. 11 Introduction . 11 Mineralogy and composition....... ........... 12 General character or magnesite..... ....... ................. 14 Comparative analyses......................... .............. 15 Dt:SCllll'TlOX OF TIU; Di::POSITS.................................... 16 Location . 16 Discovery and history of develotJment......................... 16 Transportation . 22 ~fining methods.. 23 Power . 26 Geology . 27 Occurrence and geologic relations. 27 Reserves . 28 Structural features.... 28 Genesis . 31 Prospecting . 39 Northwest Magnesite Company. 41 Finch deposit. 41 General features............. 41 Description or the deposit. 41 Mining methods employed............................. 43 Description or coarse crushing plant. ................. 44 Keystone deposit ......................................... 46 l\llidntght claim ......................... .......... ..... 48 American Mineral Production Company. .. ..... ... .. .... ..... 49 General statement................... • . 49 Allen and Moss deposits. 49 Red marble deposit. • . 52 \Voodbury deposit........ ................................ 53 American Refractories Company. 54 Double Eagle deposit.... 54 General statement. ... ... ...... ..................... 54 Location and accessibility. 55 Geology . ... 55 U. S. Magnesite Company......... 56 Crosby Magnesite Company.. .. 57 Dor.0~1 ni-: . 59 Tulare Mining Compan~·. .. ..... .......... ..... .......... 59 General statement. 59 Geology . .. 59 Mining methods . 61 Description of calcining plant..... ..... 62 Possibilities or developing other deposits.... .............. 63 6 Conf P11ts Pngc Wom.D P110lll'CTIOX OF' 1\1,,<::-rnsrn:.... .. ....... 66 North America . 66 California . ... 66 New Mexico. 68 Nevada . 68 Canada . 68 Grenville district, Quebec. ........... ............... 68 Atlin district, B. C. 69 Bridge River district, B. C... .. i O Mexico . 70 Sou th America. 70i Veneiueli,. 70 Europe . • . • . 71 Austria-Hungary . • . 71 Russia . 7+ Norway . .. , 5 :Italy . 75 Macedonia . 75 Greece . 76 Africa . • . 76 Transvaal . .. 76 Asia . .. 76 India . 76 Madra 76 Mysore . .. • .... ....... .. .. ................ ... 7 (l Australia ............... • .. .... • .. ........ ... .... ..... 77 New Soutll \Va les . ... ............... ..... ... .... 77 South Australia . • ..... ... ........... ... 7i Western Australia ............. ... ....... ... .......... Ti Miscellaneous foreign o<·currencP.1 .. .. .. ...... ......... 71 Tim Rt:IIL' C'TIOX 0 1' M., r:xrcs1n; FOIi Rt:n:.\l"l'OICY Ust:s .. .•... ... ... 78 Cntroduction .. .......... .. ........ .... ............... 78 Effect of kiln heatin!?: .. ..... .... .. .......... .. ......... 79 Dissociation ol' mineral carbonates ... .. .... ................. 82 Use of magnesite in metallurgical furnace~ . .... ......... 8.J Ret'ractory reduction methods ...... .. ....... .. .... .... .... 8 li Austria 86 Greece 87 Canada 88 CalHornia ....... ... .................. .. 89 Washington refractory reduction methods... .... ........ .. 90 American Mineral P roduction Com pan~·......... .......... 90 Northwest Magnesite Company .......................... 91 Flow sheet, mine to cars..... ......... .... .... .... 91 Mill storage . 91 Crushing and grinding.... .. .. ........ .. ... ... .. .. 92 Contents 7 T m: R•:un:TJO~ OF MAG;s;.:s1·r~: F'Oll REF1tAC'l'0 11\'. Usi,:s-Continued : , vashington refractory reduction melbods- Nortbwest Magnesite Company- Paoc Treatment of iron ore............................ .... 92 ~fixing . • . 93 The rotary kilns with tables of performance. 94 1' iln lining . • . 98 Fi nal steps in the process ............................. 100 Properties of caustic, dead-burned and fu sed magnesia ......... 101 A1)J)earance . 101 Specific heat ..... ........................ .......... .... 102 Thermal expansion, hydration, slaking .................... 103 Action or carbo n, phosphorous, and silica at bigh tempera- tures upon dead-burned magnesite ..... .. .. ... ....... 10-1 Magnesia crucibles .............. ................... ... 104 The manufacture of dead-burned magnesite brick ......... ... 105 Binders . 105 Crushing and oroportion ing ............. .. ......... .. 107 Mix ing ... ............................................. 108 P ressing . 108 Drying . LOS Burning .... .. ... ..... ..... ......................... 110 Sorting . 110 P ropert ies of dead-bu m ed magnesite brick .............. • ..... 110 General . 110 Chemical composition . I l 1 Specific gravity . ........... .. ... .. ..... .... 111 Refractoriness . ..
Load more

Recommended publications
  • A Review of Flotation Separation of Mg Carbonates (Dolomite and Magnesite)
    minerals Review A Review of Flotation Separation of Mg Carbonates (Dolomite and Magnesite) Darius G. Wonyen 1,†, Varney Kromah 1,†, Borbor Gibson 1,† ID , Solomon Nah 1,† and Saeed Chehreh Chelgani 1,2,* ID 1 Department of Geology and Mining Engineering, Faculty of Engineering, University of Liberia, P.O. Box 9020 Monrovia, Liberia; [email protected] (D.G.W.); [email protected] (Y.K.); [email protected] (B.G.); [email protected] (S.N.) 2 Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109, USA * Correspondence: [email protected]; Tel.: +1-41-6830-9356 † These authors contributed equally to the study. Received: 24 July 2018; Accepted: 13 August 2018; Published: 15 August 2018 Abstract: It is well documented that flotation has high economic viability for the beneficiation of valuable minerals when their main ore bodies contain magnesium (Mg) carbonates such as dolomite and magnesite. Flotation separation of Mg carbonates from their associated valuable minerals (AVMs) presents several challenges, and Mg carbonates have high levels of adverse effects on separation efficiency. These complexities can be attributed to various reasons: Mg carbonates are naturally hydrophilic, soluble, and exhibit similar surface characteristics as their AVMs. This study presents a compilation of various parameters, including zeta potential, pH, particle size, reagents (collectors, depressant, and modifiers), and bio-flotation, which were examined in several investigations into separating Mg carbonates from their AVMs by froth flotation. Keywords: dolomite; magnesite; flotation; bio-flotation 1. Introduction Magnesium (Mg) carbonates (salt-type minerals) are typical gangue phases associated with several valuable minerals, and have complicated processing [1,2].
    [Show full text]
  • Ore Deposits
    EARTH SCIENCES RESEARCH JOURNAL Earth Sci. Res. J. Vol. 20, No. 3 (September, 2016 ) : A1 - A10 ORE DEPOSITS Occurrence of Cr-bearing beryl in stream sediment from Eskişehir, NW Turkey Hülya Erkoyun and Selahattin Kadir * Eskişehir Osmangazi University, Deparment of Geological Engineering, TR−26480 Eskişehir, Turkey [email protected] [email protected] *corresponding author ABSTRACT Keywords: Beryl, Kaymaz, schist, SEM-EDX, IR. Beryl crystals are found within stream sediments transecting schists in the northeast of Eskişehir, western Anatolia. This paper studied the Eskişehir beryl crystals with optical microscopy, scanning electron microscopy (SEM-EDX), infrared spectroscopy (IR) and geochemical analyses. Beryl is accompanied by garnet, glaucophane, quartz, epidote, muscovite and chlorite in the stream sediments. The crystals are euhedral emerald (green gem beryl) and light bluish- green aquamarine, with ideal sharp IR bands. Wet chemical analysis of Eskişehir beryl yielded 61.28% SiO2, 15.13% Al2O3, 12.34% BeO, 0.18% Cr2O3, 1.49% MgO, 1.69% Na2O, 0.98% Fe2O3, and 0.008% V2O3, resulting in the formula (Al1.75Cr0.01Mg0.22Fe0.08)(Be2.90Si6.00)(Na0.32)O18. Large Ion Lithophile Elements (LILE) (barium, strontium), some transition metals (cobalt, except nickel) and High Field Strength Elements (HFSE) (niobium, zirconium, and yttrium) in stream sediments that are associated with beryl exhibited low content about metamorphic rocks. Beryl formation appears to be controlled by upthrust faults and fractures that juxtaposed them with Cr-bearing ophiolitic units and a regime of metasomatic reactions. Such beryl crystals have also been found in detrital sediments that are derived from the schists. Presencia de berilios relacionados con Cromo en corrientes sedimentarias de Eskisehir, noroeste de Turquía RESUMEN Cristales de berilio fueron encontrados en sedimentos de corrientes que atraviesan en esquistos en el noreste de Palabras clave: Berilio, Kaymaz, esquistos, Eskisehir, al oeste de Anatolia.
    [Show full text]
  • V011ime 19 April 11,1996 Number 15
    Iares hilI IIlI V011IME 19 APRIL 11,1996 NUMBER 15 m. \ a I or 20 years, Solans mi has celebrated the life and fought the battles of Key West. Take a quick look back, beginning on page 4. ||j P AGE 2 soiares hill APRIL 11, 1996 NICE PRICE for PARADISE! HOMES from $139,900 at KEY WEST GOLF CLUB 2-Bedroom homes for $97038 per month. * Monthly Mortgage Payment $626.72 Monthly Real Estate Taxes ..,. .$109.00 Monthly Homeowner's Assoc. Dues $169.00 Monthly Homeowner's Insurance $ 65.66 Total Monthly Payment $970.38 •Assumes safe price of SBMflfl.'«) yeai amortization. %3m APR,'toncmg fees and closing assts not included RMI estate calculations a^ume homestead exemption 200 acres lush tropical landscaping . Pre-construction prices available • 18-hole championship golf course Private, gated residential community 24-hour security Classic conch style architecture On Site Sales Office Open Daily (30?) 292-0020, U.S. I at MM 5, turn on College Rd. Sales Office at Truman Annex |3O5) 296-7078 in Bldg. 21 on Front Street APRIL 11, 1996 solares hill PAGE 3 Solares Hill: Twenty Years In Margaritaville ByPamDoto drugs, affordable housing, Duval with David Ethridge and Anne Carlisle Street's trashy condition, and, of course, morality. Does anybody hear olares Hill is 20 years old this an echo? month. Or maybe 25. Actually, In the mid-70s, Key West was S the earliest editions of the just beginning to shake off effects of paper appeared in 1971, but after a an economy stunted by Navy down- two year straggle, publication was sizing in which we lost 25 percent of suspended and it wasn't seen again our population, and the stable pay- until April of 1976.
    [Show full text]
  • Economic Evaluation and Perspectives of the Magnesite Mine in the Deposit “Dubovc”
    Modern Environmental Science and Engineering (ISSN 2333-2581) September 2016, Volume 2, No. 9, pp. 620-624 Doi: 10.15341/mese(2333-2581)/09.02.2016/006 Academic Star Publishing Company, 2016 www.academicstar.us Economic Evaluation and Perspectives of the Magnesite Mine in the Deposit “Dubovc” Ramiz Krasniqi1, Arta Xhylani2, Jahir Gashi1, and Fadil Bajraktari3 1. Independent Commission for Mines and Mineral, Armend Daci No. 1, Prishtinë, Kosovo 2. University of Prishtina, Kosovo 3. Ministy of Environment and spatial Planning, Kosovo Abstract: In The magnesite deposit “Dubovc” is located in the area of the village with the same name, about 10 km, in Southwest of Vushtrri in the north slopes of Çiçavice mountain. The deposit has been explored in the great mass with a relatively dense network of underground mining operations and drilling so today we can say that the exploration level of deposits is satisfactory. The deposit is represented by two great magnesite veins laying in the North west and South southeast direction, and according to the data of exploration operations it lays in the NE direction, except in the deeper parts dictated of surrounding rocks the vein will entirely change the angle and direction of dipping. The done studies in the period from the mining interruption until now has denied the opinion of some previous researchers of this deposit, that calculate only for main veins of the deposit “Dubovc”, the deposit contains 1.5-2 million tons of reserves. The general final calculated reserves for all deposit “Dubovc” are 964 949 tons, from which the North part 409 898 ton, and South part 555 051 ton magnesite.
    [Show full text]
  • Bicycles. Lessons, Practical Elizabeth Conn
    Pure Water Milk Bottle Supply EX Caps. Consult or write i Plain; 'waxed ; printed. Any sty le; any quantity, z Prices first E. N. Sipperley, south nokwalk,' conn.. right. Quality grade. B tWi . (ji k The Driller of Artesian Wells. If interested in Bee. bj Automatic Tool Company, Wells or Windmills, Engines or Pumps. ewtown South Norwalk, .Conn. VOLUME XXX. NEWTOWN, CONN., FRIDAY, JUNE 14, 1907. TEN PAGES. NUMBER 24 At the annual meeting of the North I The Melbourne Cancer TOWN TOPICS. Center school district at the school-hous- e, last Saturday evening, June 8. I A 25c Bottle of Cure Co. AT LIBRARY CORNER. 11c iiuwuiK omcers were elected:! THE SIMPLEX MACHINE. Clerk. Captain Albert H.Peck; com-- 1 mitteeman, Thomas F. Bradley : treas-- 1 I 64 Bank St. Derby, Ct., urer and collector. D. C. Peck. Miss Kemps Balsam Margaret Houlihan was chosen teacher Oure Cancer at their Sanatorium and guar- INSTALLED LAST WEEK. for the ensuing year. A vote was I Contain antee a positive cure. They also treat mild also taken to make a number f im cases and old sores at your home If desired provements on the buildirur. JnrW 40 and can send a blood medicine wil Blue The article which you are reading, W. DOSES, you that How A J. Beecher and About et Prof Jewell And each done cure Internal growth of all kinds. Corres- gentle critic, is type-s- by machinery. were a R,ia is man effective than solicited. References is also written by on a appointed committee to raise four times the same quantity of any pondence gladly given.
    [Show full text]
  • Portable Art Collection
    PORTABLE ART COLLECTION Prepared by City of Bellevue Arts & Culture Program 2021 PB 1 CITY OF BELLEVUE PUBLIC ART COLLECTION BELLEVUE ART COLLECTION’S MISSION ABOUT THE PORTABLE ART COLLECTION The City of Bellevue seeks to be a vital In 2020 the Bellevue Arts Commission platform for cultural exchange and creative purchased 21 new works for the Portable inspiration. The City turns to living artists Art Collection. The goal of growing the to enrich the collective experience of collection of portable artworks is to diversify Bellevue’s public places through permanent the collection by adding a range of visual art commissions and a growing collection of mediums and artistic voices. Portable art movable artworks funded through the Public will also increase the number of artworks Art Program. A segment of the collection is accessible in city-owned buildings in devoted to artworks that raise the discourse Bellevue neighborhoods. Prior to this call, on the defining aspects of the City’s Portable Art Collection contained Bellevue’s civic life, exploring the diverse only a handful of artworks, one or two being identities of our residents, converging added every few years. cultures, international connections, technological currents and interplay between nature and the urban experience that make Bellevue’s environment unique. Bellevue’s art collection helps document the dynamic moments and complexities of Bellevue’s cultural life and is an important resource for future generations. Pictured above: Truth by David Middlebrook 2 LIST OF AVAILABLE PORTABLE
    [Show full text]
  • The Youth's Realm
    VOL. IX. BOSTON, MASS., JANUARY, £903 NO. 1. AAA&AAAAAAA inade fools of us for dot surbrise. I harbor no spies, and I will not insult dink she send vord to de enemy.” my people by any hint of treason.” Sir Williams who watched all thisty She arose. “Is that all, gentlemen ?” with excited interest, struck a silver^ “Ven you got leaf to ride out off our bell sharply and an orderly entered lines afder de gouncil of var belt here from the hall and saluted. on de second, dit you go to de mill or America’s Greatest “Light the candles and beg Mrs. to Vhitemarsh?” asked Knyphausen. Darrah, with my compliments, to favor “The mill Is in Whitemarsh,” she us with a visit.” said calmly and then added warmly: * A light step sounded in the hall and “You know, general, that my husband there was a knock on the door. Sir was a loyalist and was killed in the New Year’s Day William arose and opened it. A tall, king’s cause. If he were alive, he slender, handsome woman of forty, would not suffer me to be insulted W By J. M. HARLESTON dark complexioned, with features She began to weep. “Besides,” she rather long to be called beautiful, but went on, “the rebels have not the price Copyright, 1901, by Frederick R. Toombs with a gait and mien that were queen¬ to pay for spies even if I were merce¬ AA/WWi ly, entered and eourtesied to both. nary.” “Mrs. Darrah, may we ask that you Stung to the quick by the last word, CHAPTER I.
    [Show full text]
  • Bear Valley Mountain Resort Expansion (7910)
    Bear Valley Mountain Resort United States Expansion (7910) Department of Agriculture Forest Service Environmental Assessment Stanislaus National Forest Stanislaus National Forest Calaveras Ranger District Alpine County, CA September 2012 The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C.-20250-9410, or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. Table of Contents 1. Introduction ...................................................................................................................1 1.1 Background ............................................................................................................1 1.2 Forest Plan Direction ..............................................................................................4
    [Show full text]
  • HOUSE of REPRESENTATIVES to Increase Agricultural Purchasing Power and to Meet the Need of Combating Mr
    1942' CONGRESSIONAL RECORD-HOUSE 5241: - ADJOURNMENT .- 1 bill to · provide for recip,rocal .pri-vileges with 1 defense-pz:ogram and.a.reenactmen1 of legisla- ·_ Mr. PRIEST.- Mr.-· sp_eaker·, 1 ·move· F.espt)ct to the filing· of applications, for pat-· 1 1(l.on - si-milar, ~ that -of ~ 1917 and,.. so give· to, ~nts for inventions, and for other purposes;:­ the young men pf 194:2_ the , protection- .th~r ­ that the Rouse do now adjourn: - -- - to the Committee on ·Patents. fathers had in 1917; to the Committee on . The motion was agree·d· to; accordingly 1756. A letter · from the Secretary of the Military Affairs. · (at 2 o'clock and 12 minutes p. m.) the Interior, transmitting herewith, pursuant to 3065. By Mr. HEIDINGER: Petition of Mrs. House adjourned until tomorrow, Tues-· the act of June 22, 1936 (49 Stat. 1803). a E C. Jacobs and 38 other residents of Flora, day, June 1~, 1942, .at 12 o'clock noon. report dated November 30, 1939, of economic Ill., urging the enactment of Senate bill conditions· affecting certain lands of the' irri- 860; trr the Committee on Military Affairs . gation project under t-he jurisdiction of the 3066. By Mr. LYNCH: Resolution of · the: Oroville-Tonasket irrigation district in the Butchers' Union of Greater New York and COMMITTEE HEARINGS State of Washington; also ~ draft of bill to vicinity, urging increases in pay for postal Cq~MITTEE 0~ PUB~IC ~UILDINGS AND GROUNDS provide relief t_o the own.ers of former Indian­ employees; to the Committee on the Post There will be a meeting of the com-.
    [Show full text]
  • Preliminary Report Magnesite Deposits
    State of Washington ARTHUR B. LANGLIE, Governor Department of Conservation and Development ED DAVIS, Director DIVISION OF GEOLOGY HAROLD E. CULVER, Supervisor Report of Investigations No. 5 PRELIMINARY REPORT ON MAGNESITE DEPOSITS OF STEVENS COUNTY, WASHINGTON By W. A.G. BENNETT OLYMPIA STATE PRINTING Pl.ANT CONTENTS Page Introduction . 3 Earlier investigations . 4 Field work . 6 Acknowledgments . 6 Rocks of the magnesite belt . .. .............................. ......... 7 Deer Trail group ................................................ 7 Huckleberry conglomerate ....................................... 8 Huckleberry greenstone ......................................... 8 Addy quartzite ............ .......................... .......... 9 Undifferentiated limestone ................................... .. 9 Igneous rocks .................................................... 10 Structure . 10 Folds ....................................................... 10 Faults ............... ...... .................... · · · · · · · · · · · 11 Magnesite deposits . .............. ......... .. .............. .. 12 Mineralogy . .. ... ........................... .............. 12 Texture of the magnesite and dolomite ............................ 12 Stratigraphic position ................................ .......... 12 Origin ..... ................................... ..... ......... 13 Extensions of the Stensgar dolomite .................. ............. 14 Description ..................................................... 14 Area north of the Finch quarry.
    [Show full text]
  • MAGNESITE CRYSTALS from ORANGEDALE, NOVA SCOTIA Lrruax M
    JOURNAL MINERALOGICAL SOCIETY OF AMERICA 223 FeO.AlzOa.4SiOr 952 FeO.SiOz 48.97 MnO.SiOz 37.99 CaO.SiOz 3.83 HrO 037 100.68 Two other triclinic substances appear also to belong to the rhodonite-babingtonite group. One is the mineral sobralite,2aa metasilicate of manganese, iron, lime, and magnesia, and the other is a siag product, called vogtite,2swhich is apparently like the triclinic babingtoniteJike slag crystals described by Vogt.26 These crystals have pyroxene-like cleavagesand angles and were thought by their discoverersto belong with rhodonite and babing- tonite' suuuenv New determinations of the chemical and optical properties and the density of babingtonite have been made. Its unlikeness to the monocUnic pyroxenes has been discussed. The arbitrary character of the boundaries of mineral groups, especialy triclinic groups, is mentioned, and it is suggested that babingtonite, rhodonite, pyroxmangite, and sobralite are sufficiently alike, and also unlike the pyroxenes and other mineral groups, to be grouped by themselves. MAGNESITE CRYSTALS FROM ORANGEDALE, NOVA SCOTIA Lrruax M. Donr:rr.,Stanford. [Inivers,ity The unusual rarity of euhedral crystals of magnesite led the writer to make a special study of some obtained from Ward's Natural ScienceEstablishment by Dr. A. F. Rogers a few years ago. The crystals come from a magnesitedeposit near Orangedale, fnverness County, Nova Scotia, the occurrence of which was describedby A. O. Hayes in 1916.r According to Hayes, the deposit was discovered by Alexander Mcleod on the f4rm of John Martin, Mclean point road, about 2aJ. Palmgren,Bull. Geotr.Inst. (Jnia.Upsola, 14, l}g, (lgll).
    [Show full text]
  • Case Study at Lokop, Dairi, Latong, Tanjung Balit and Tuboh)
    INDONESIAN MINING JOURNAL Vol. 17, No. 3, October 2014 : 122 - 133 MINERALIZATION OF THE SELECTED BASE METAL DEPOSITS IN THE BARISAN RANGE, SUMATERA, INDONESIA (CASE STUDY AT LOKOP, DAIRI, LATONG, TANJUNG BALIT AND TUBOH) MINERALISASI CEBAKAN LOGAM DASAR TERPILIH DI BUKIT BARISAN, SUMATERA - INDONESIA (STUDI KASUS DI LOKOP, DAIRI, LATONG, TANJUNG BALIT DAN TUBOH) HAMDAN Z. ABIDIN and HARRY UTOYO Geological Survey Centre Jalan Diponegoro 57 Bandung, Indonesia e-mail: [email protected] ABSTRACT Three types of base metal occurrences discovered along the Barisan Range, Sumatera are skarn, sedex and hydrothermal styles. The skarn styles include Lokop, Latong and Tuboh, while Dairi and Tanjung Balit belong to sedex and hydrothermal deposits, respectively. The Lokop deposit is dominated by galena with minor pyrite and is hosted within interbedded meta-sandstone, slate, phyllite, hornfels and quartzite of the Kluet Forma- tion. The Skarn Latong deposit consists of galena with minor sphalerite and chalcopyrite with skarn minerals of magnetite, garnet and calcite. It is hosted within the meta-limestone of the Kuantan Formation. The Skarn Tuboh deposit is dominated by sphalerite with minor galena, pyrite, manganese, hematite and magnetite. It is hosted within interbedded meta-sandstone and meta-limestone of the Rawas Formation. The Dairi deposit belongs to the sedimentary exhalative (sedex) type. It is hosted within the sedimentary sequence of the Kluet Formation. Two ore types known are Julu and Jehe mineralization. The Julu mineralization referring to as sediment exhalative (sedex), was formed syngenetically with carbonaceous shale. Ore mineralogies consist of galena, sphalerite and pyrite. The deposit was formed within the temperature range of 236-375°C with salinity ranges from 9,3-23% wt.NaCl.
    [Show full text]