 | | Journal (article/letter/editorial) | | crystals, Arkansas also boasts an array of other minerals, as evidenced by this county-by-county description...continued with mining in north ern and western Arkansas and Magnet Cove during the Civil War, and peaked...in full swing and the demand for and price of Arkansas quartz crystals has skyrocketed. In October 1987...exploited. Continued interest in and study of Arkansas minerals, par ticularly the microminerals, will...for their good companionship during my years of Arkansas collecting. Particular thanks goes to these hardcore |  | | Book | | Collecting Arkansas JVlinerals A Reference and Guide By Arthur E. Smith, Jr. ,'T Collecting Arkansas...Box 2043 Coeur d’Alene, Idaho 83816-2043 iii Arkansas Counties 1 \ I •( 11 o •« c »««ou cxi ju4«iO«J...u L£Z.i I OAUAJ OUACHITA S CAI.MOW* (QAAOIC V. lCI 1 s I H C-ohaoCI--------------- J—, I rniuifl... l 5 I •*OOOAUC» /4<*.K«C«] AOl« -4 I T V Sf 84ir.4«] vs*l*fl ^ l C«*IC«U0 l*0t»0«0t*0...s to*c I jQ*<*ZO * r«4M«(.|M^ \ r l w-|U|i V 0«(* 1 I 0«HA r S H X askcct jchicotV I \ |  | | Journal (article/letter/editorial) | | during the past twenty years than the --------Arkansas Magnet Cove locality. - - - - - - - - Minerals...Vanadium Mines POTASH SULPHUR SPRINGS, ARKANSAS J. MICHAEL HOWARD Arkansas Geological Commission 3815 West...Little Rock, Arkansas 72204 DON R. OWENS Earth Science Department University of Arkansas at Little Rock...Rock 2801 South University Little Rock, Arkansas 72204 Unless otherwise noted, all photos by J. Michael...range, tennis court, horse stable, and artificial lake with a boat dock for fishing and boat rental. The |  | | Report (issue) | | INTERIOR THOMAS S. KLEPPE, Secretary GEOLOGICAL SURVEY V. E. McKelvey, Director First printing 1976 Second...lithium pegmatites: Varutrask, Bikita, and Bernic Lake, by E. Wm. Heinrich, University of Michigan, Ann...Utah, Salt Lake City, Utah, and Carol A. Petersen, Utah Geological and Mineral Survey, Salt Lake City, U...of lithium from seawater, by Meyer Steinberg and V. D. Dang, Brookhaven National Laboratory, Upton, N...Origin of lithium and other components in the Searles Lake evaporites, California, by George I. Smith, U.S |  | | Book | | some of them, including Nb, the rare earths, Cu, V, phosphate, vermiculite, bauxite, rav., materials...of the occurrence, although often in central intrusive complexes in particular little is known of their...improve helped with useful i n formation on the V la co Province ments suggested by my colleague D.R...pruce Lake 6 Easter Island dyke 7 Blachford Lake 8 Thomas Lake 9 H e n n i nga Lake 10 Kaminak Lake '1 1...1 La t Lake 12 Atlin 13 Atsutla Range 14 Mount Edziza 15 Galore Creek 16 Lonnie 17 Goosly Lake A 11a/1i111 |  | | Journal (article/letter/editorial) | | stocks of Oligocene age crystallized in three intrusive centers whose tops are 1 km below the surface...lower temperature assemblages broadly envelop intrusive centers, rather than single stocks. Some of the...into two suites on the basis of position: above intrusive centers, formed from fluids that flowed upward...out the top of mineralizing stocks from several intrusive centers; and on the flanks of the Seriate center...centers; proximal to stocks, the multiplicity of intrusive events repeatedly reversed the overall trend toward |  | | Journal (article/letter/editorial) | | molybdenum deposit. The stocks are grouped into three intrusive centers, and the mineral assemblages, including...into two suites on the basis of position: above intrusive centers and on the flanks of the Seriate center...suites of assemblages. The suite formed above intrusive centers was deposited by more saline fluids (salinity...temperatures, the suite of assemblages that formed above intrusive centers formed at higher fS2, fO2, and aK+/aNa+...intermediate argillic assemblages that precipitated sphalerite and F-bearing, Mn-rich garnet. Fluorine was continuously |  | | Journal (article/letter/editorial) | | siliceous ooze, accompanying the formation of acidic intrusive rocks during the late Onnagawa stage. Keywords:...and calcareous benthic foraminifera replaced by sphalerite in the black ore from the Shakanai mine (Nakajima...porphyritic dacite -- -- -- v -- -- vv vv ---- -v v- --vv --------- -- v v -- -- - -- - - - ~ -- - -...tuff L-200 gypsum zone -- -- layered-lapilli tuff v v dolerite basic tuff Fig. 3 A cross section of the...“siliceous black ore”, being composed mainly of sphalerite and barite, with auxiliary galena, tetrahedrites |  | | Journal (article/letter/editorial) | | DEPOSIT v v v vv v v •,v v v v v 1543 Matagam•L3t(e v v ,-..... v v Garon Lake v v v v...v v v v v v v v v v v v v v v v v I•oo 76 • i ABITIBI SUBPROVINCE v km 150 v kilometers...kilometers v v v i v Intrusive Rocks Diabase dyke • OlgaLake pluton • Peridotite Wabassee Group...:'"'w•Bellbasalt '•[--•-]Allard andesite v Watson Lake Group • • v ,'-', Younging direction,k Massive...unitsimilar to the Key tufflte(described below)is interbed- V•ract unitbasaltpinchesout.In thisarea,theAllard dedwithrhyodacite |  | | Report (issue) | | WILLIS QUADRANGLE AND ADJACENT BROWN1 S LAKE AREA, BEAVERHEAD COUNTY, MONTANA A preliminary report by W^...»»*.. «» *»*. « » * 4VJbW 10 WA N/4» W JLfl££*V?V/Ud A WV**£d «»»«*"*»"**«<»«»*«»«»«»«»«««***«»«............. ......-....-.. ....~»......... 15 Intrusive rocks ..~...-......~.........~...~.~........ ...effects - ^ »" » "" -- - 18 jj tJt^Vlv* » U* %*"**"*** V*******"*"***"************""*******"*"*****"**" ***"**********"******...-ivi.-- ^.'", -x^t*! :--«!L ..- - -. --.-* ;^ ^; .v -* r-^ -'. - 1-.' I*h**i f Am ' 'jr--. -,;. *-«-5i^ |  | | Book (volume) | | Gulf Oil Exploration and Production Company Paul V. Hoovler Kennecott Minerals Company Kerr McGee Corporation... . . . . . . . . . . . . . . . . . . . . . . . . v Foreword . . . . . . . . . . . . . . . . . . . ....volumes published by the Geological Survey of Canada v Foreword The goal of The Geology of North America...North Carolina, Alabama, Mississippi, northern Arkansas and Louisiana. He first crossed the Mississippi... in the states of Louisiana, Mississippi, and Arkansas. The physiographic and bathymetric provinces of |  | | Journal (article/letter/editorial) | | intruded by a granodiorite and quartz monzonite intrusive complex of Early Devonian age (Ambler et al. 1977)...1977) on the southern side of the orebody. The intrusive complex hosts copper porphyry and vein type mineralisation... mete-conglomerate V mete-siltstone, slate ORDOVICIAN Angullong Tuff +7 + v ~ ~ meta-andesitic...pyroclastics & levas V Malongulli Fm. meta-siltstone, meta-andesite V V Intrusive rocks ~ Z - ~ diorit...diorit e ~ ~ monzonite ~ ange V V 15~'E I Fig. 1. Geological map and location of mineralisation, Cadia |  | | Report (issue) | | district is in the southwestern part of Socorro County, N. Mex., about 14 miles from the Arizona line...production in Mogollon or Cooney district, Socorro County, N. Mex., 1904-1917. Year. 1904 1905...........040,356 fiOQ 1fi9 Total value. Silver. 1 41 n V)"7 46 49 1,873 184 4,418 858 414 1,862 386 1,217...Basalt dikes. Tertiary: Mineral-bearing veins. Intrusive andesite porphyry. Red sandstone and conglomerate__________...GEOLOGIC MAP OF THE MOGOLLON DISTRICT, SOCORRO COUNTY, M. MEX. Scale Vz 1000 MOO iMSle 2000 Contour |  | | Report (Issue volume) | | IV. South Australia. Dept. of Mines and Energy. V. Geological Survey of South Australia. (Series: Bulletin...South Lake Gabbro .....................................................................42 Lake Harris.........................................109 Lake Everard ..........................................Volcanics ...................................115 Intrusive dykes and plugs ................................rocks ..................................149 Intrusive suites ...................................... |  | | Journal (article/letter/editorial) | | (Karroo). Permian to Jurassic. Unconformity. V. Intrusive Rocks. Gabbro and diabase sills and dikes.... Younger gray granite. IV. Katant7aSystem. v.. Kundelungu series. x. Mine seriesCopperDeposits. Unconformity...about5ø meters. It was coatedwith chalcocite. Sphalerite has been observedin a few small isolatedparticles |  | | Book (volume) | | decided to set up a Subcom1nission on Precambrian V • PREFACE Vl Stratigraphy operating as one of...Adelaide, S.A. September, 1967 CONTENTS PAGE PREFACE V THE PRECAl\IBRIAN OF JNDIA by C. S. Picl1an1uthL1...JUTOG~ ,y SI Mt..A••CH AIL r / \. f f\ • G A V HAll 24• I r 0 2-4 M A l CHO T.~ S I NGH8HU...MA D RA S J> -z.. t -N- I (JI 0 200 l 1' I V A N O P.UM CEYLON FrG. ] . Principal physiographic...He chose the name " Dharwar" from the district (no,v- in 1\1:ysore State) in which he first recognized |  | | Book | | assistance of my colleagues Dr. D. C. Almond, Mr. S. V. Bell, Professor L. Berry, Dr. I. M. Boushi, Dr. A...Group 36 (iii) Basic intrusive rocks 36 (iv) Awat ‘Series’ or Group 36 (v) Injection granite and...46 47 (a) THE CONTINUATION OF THE ERDI—ENNEDI (v) Sequence proposed by Ruxton (1956) 17 (vi) Basal...OF DONGOLA ETHIOPIAN MARCHES (q) (3) C Member (v) Dungunab Formation (post-Middle Miocene) 101 SOUTHERN...CHERT FORMATION (f) JEBEL MARRA VOLCANIC COMPLEX (v) Regional description: Jebel Uweinat(vi) Regional | | | Book | | assistance of my colleagues Dr. D. C. Almond, Mr. S. V. Bell, Professor L. Berry, Dr. I. M. Boushi, Dr. A...Nafirdeib ‘Series’ or Group FEATURES (iii) Basic intrusive rocks (iv) Awat ‘Series’ or Group 2. CLIMATE...GEOLOGICAL JUBAL EL BAHR EL AHMER, MO- SEQUENCE (v) Injection granite and red granite (vi) Acid and basic...Beila and Ban Balos granites (iv) Newer intrusions (v) Sequence proposed by Ruxton (1956) (vi) Basal schists...60 62 CONTENTS Vili (iv) Thickness variations (v) Regional description: Jebel Uweinat— 64 (vi) Regional |
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