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| Springer-Verlag 1992 Printed in Austria Phyllonite Formation and Alteration of Gneisses in Shear Zones (Gleinalmkristallin...(Gleinalmkristallin, Eastern Alps/Austria)* W. Prochaska 1, A. Bechtel 2, and U. K16tzli 3 Institut fiJr Geowissenschaften...Geowissenschaften, Montanuniversitfit Leoben, Austria 2 Mineralogisch-Petrologisches Institut der Universit~it...accepted March 10, 1992 Summary The leucophyllite (quartz-muscovite-chlorite-phyllonites) deposit WeiBkirchen...the host rock paragenesis (quartz-muscovitegarnet) yielded temperatures in the range from 623 to 642 °C |
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| D.-k-Sc., F.G .S. Professor of Applied Geolog y in the Lille University and JOHN PRINGLE, F.G.S. of...the Weald, a region formed by an anticlinal fold in the Cretaceous rocks. The anticline has been denuded...what is called the Haut-Boulonnais. It is a hilly district with bold escarpmen ts, dry and permeable, and...agriculture. It thus stands in marked contrast to the low-lying district composed of Jurassic rocks,...visible in the eastern part of the district, and the more recent along the margin of the coast. In the N |
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| STATISTICAL ANALYSIS OF CLAY MINERAL ASSEMBLAGES IN FAULT GOUGES K. KLIMA,' G. RIEDMULLER,' AND K...University of Graz, RechbauerstraBe 12 A-801O Graz, Austria 2 Institute of Geology and Paleontology, University...A-801O Graz, Austria Abstract- The clay mineral distributions in fault gouges from shear zones in several...Alps were statistically analyzed for consistencies in their occurrence. Discriminant analyses suggested...kaolinite, and chlorite, The clay mineral distributions in the fault gouges appeared to be related to regional |
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| Magnetite and olivine (with fayalite).--As discussed in "Silikatschmelzlisungen," I (1903), the individualization...less magnetite and somewhat more olivine, we find in the "titanomagnetite"olivinites, chiefly consisting...them also myself, the olivine in these rocks appears partly porphyric in the "titanomagnetite" when it...the "titanomagnetite "-olivinite from Cumberland in Rhode Island, according to C. H. Warren' with an...ilmenite, 9.2 labradorite (Ab3An4), 3.6 spinel (and in addition a little Or and sulphide). The specimen |
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| ANORTHOSITES "' W. N. LODOCHNIKOW Petrograd ABSTRACT In an article by N. L. Bowen on "The Problem of the...many misunderstandings. Attention is called to these in this paper.2 THE TEMPERATURE QUESTION First of all...all monomineral rocks such a sharp outstanding one in general, as represented by N. L. Bowen ? The question...magmas is not a new one for Russian petrographers. In 1911 Loewinson-Lessing3 called attention to the fact...leads to the following: Let us provisionally suppose, in spite of all that is known, that rocks are precisely |
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| about, m4 | spot rocks and minerals “| and stick in the stars. FINDERS ROCKS AND MINERALS How TO...MINERALS JASPER When water that is tich in silica fills the cracks in a rock, it sometimes forms tiny crystals...jasper. rocks or minerals, stick one of your stars in the box next to it. CINNABAR This mineral was once...Some rocks and minerals come in several colors or forms. You'll see others in manufactured objects. You...lead. They are often used in steel manufacturing Difficult words are explained in a glossary on page 32 |
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| pp. 177-197 THORIUM MINERALIZATION LEMHI ALFRED IN THE LEMHI COUNTY, PASS AREA, IDAHO L. ANDERSON... 196 197 ABSTRACT The thorium mineralization in the Lemhi Pass area of southeastern Lemhi County...fracture zones,and reopenedcopper and gold-quartz veins and lodes, in impure quartzitic and phyllitic rocks...mineralized rock reaching distancesto 2,000 feet in length. These zones contain notable concentrationsof...chalcedony,and quartz. The most characteristicminerals are the thoritc, specularitc,barite, and quartz. The specularitcand |
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| CONTINENTAL TYPE IN ALASKA' R. S. TARR AND LAWRENCE MARTIN CONTENTS INTRODUCTION CONTINENTAL DEPOSITS IN ALASKA...field work by the .senior author in 19I1, and by the junior author in 19o and r19I. This paper was written...National Geographic Society's parties made some studies in 1910 and 191, has extensive glacial deposits of the...those of United States, and previously described in part by Dawson, McConnell, Russell, Hayes, Spurr...when Brooks" summarized the knowledge of glaciation in Alaska, and continuing to the present time, there |
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| phosphorite deposit on the Atlantic Coastal Plain in Beaufort County, North Carolina, contains estimated...sediment consists of phosphate pellets, sand-sized quartz grains, and clay, with thin beds of indurated coquina...phosphatic dolomite. The phosphate pellets contain quartz grains, glauconite, carbonaceous matter, and organic...Studies indicate origin of the phosphorite to have been in a shallow marine basin characterized by a reducing...phosphorite deposit in Beaufort County, North Carolina. With estimated reserves of ten bil- samer and Mr. Emil |
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| Le received at publication ojJice namo illustrated in S UPPLElIENT. No. 600. twice the size 575.100 Car............ as early as Thursday morning to appear in the follow given, what will the production be r...Newark. N. J. 5 s drnm armature type such a. given in our SUPPLE)(ENT. 8:� Ir/!,d:>a�.r. ::�!'*.��g1:·p...Waterb· y. Ct. commended. 3. Can I obain drawings in detail of 8:::.�t:Fe'c�:i�e�����I�o�f· or ��il;;ay...milling machines, and drill presses. AlIERICANdynamo in SUPPLElIENT. No. 865. just alluded Case. Seea Bookcase |
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| set ofreactions representingall these equilibria. In finding a P- 7' of formation, there is an implied...minerals, in proportion to their uncertainties.As a consequence,the equilibria are constrainedto move in a more...end-members.These essentialcorrelations should be included in any thermobarometry calculations. Of the three thermobarometry...approach, only the last two are optimal on this basis. In addition, such optimal approachesallow P- Z, their...diagnostics for outlier identification to be calculated in a computationally straightforward way. INrnooucrroN |
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| DESCRIPTION OF THE BOULONNAIS (F.R.) (a) Geography In a physiographic sense, the Boulonnais is the eastern...cuesta from the Mont de Couple at the north to Dannes in the south, following a nearly NW-SE direction passing...Lottinghen and then a NE-SW direction via Desvres and Samer. The substrate, essentially chalky, includes marly...Synclinorium. (b) Structure The Boulonnais is a rare area in northern France where the Palaeozoic basement and...recorded in the Boulonnais are as follows (from the older to the younger, after Colbeaux in Robaszynski |
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| snowy peaks. That the greenstone lmcks, that abound in many parts of it, have equally not caused it, improved...the or of worn pebbles of greenstone in the surface of the plain in the vicinity of some of the detached...phmnomenon that may be noticed almost everywhere in these mountains, and may give rise at first sight...highest parts of the molmtains would have been greatly in excess of what now falls there, causing a great extension...--Under this name I shall describe not only the rocks in the Straits of Singapore and along its shores, hut |
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| illustrated in S UPPLElIENT. No. 600. twice the size as early as Thursday morning to appear in the follow...Newark. N. J. 5 s drnm armature type such a. given in our SUPPLE)(ENT. 8:� Ir/!,d:>a�.r. ::�!'*.��g1:·p...Waterb· y. Ct. commended. 3. Can I obain drawings in detail of 8:::.�t:Fe'c�:i�e�����I�o�f· or ��il;;ay...milling machines, and drill presses. AlIERICANdynamo in SUPPLElIENT. No. 865. just alluded a 575,314 e L...-cheaper than brick, superior to SUPPLElIENTdescribing samer A. See our SUPPLElIENT. 8fi�t�i.lt��'fI���\��·.�: |
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| the Hashemite Kingdom of Jordan for a long time and in 2014 maiden mineral resources were estimated for...geology and the metallogeny of uranium mineralisation in Jordan, providing new insights into this mineralisation...mineralisation is confined to Upper Cretaceous sediments, in particular the Al Hisa Phosphorite (AHP) and the...surficial type-mineralisation that is mainly concentrated in a narrow, approximately 4?5m thick layer that is...important type of uranium in Jordan and currently represents the main exploration target in this area. The main |
 | Zaki, M. M., Chen, Shaojie, Zhang, Jicheng, Feng, Fan, Khoreshok, Aleksey A., Mahdy, Mohamed A., Salim, Khalid M. (2022) A Novel Approach for Resource Estimation of Highly Skewed Gold Using Machine Learning Algorithms. Minerals, 12 (7) 900 doi:10.3390/min12070900 | Journal (article/letter/editorial) |
| stays neutral with regard to jurisdictional claims in State Key Laboratory Breeding Base for Mining Disaster...investigated in this study by using five machine learning algorithms to estimate highly skewed gold data in the...the vein-type at the Quartz Ridge region, including Gaussian Process Regression (GPR), Support Vector Regression...performance and minimize substantial differences in the dataset’s variable ranges on predictions. The...gold grade, far outperforming kriging techniques. In this study, the key to producing a successful mineral |
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| smectites (Cr-rich smectite/volkonskoite) are hosted in altered varicoloured marble, chalk marl/travertine...changes in the Ca/Na ratio of the circulating water. The Ca-end member tyuyamunite is also common in the...marble. The Na-rich member (strelkinite) is dominant in the saprolite/top soil and its precipitation is related...1–3H2O is restricted to the secondary mineralisation in the veins of the altered varicoloured marble. Ty...The matrix is composed of U–F-bearing aggregates in intermixed calcite, carbonate-fluorapatite, and variable |
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| R. S. L., �f Ohio.�Th� quanti�;��- ;�ter, in �o;;�dS, 411 -C:'-I' Mass., $25; W. E. S., of Wis., $25;...$45; A. Q .• of N. Y., $15; J. P. H., of N. Y., iog in one minnte, multiplied intu the perpendjeular bight...$15; J. D. L., of N. Y., $4; . h t0 keep s team TIl) in If you WIS " ., 0f" l' J• II , .., .. of Iowa, $15;... of N. Y., $43; G. R. B., of Ill., use a uftmpcr In the- smok� pipe so as to keep a low fire always un·...SpeCifications and drawings and models belonging to Austria, 40,000,000; Prussia, 20,000,000; and Russia, 60 |
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| the ceiling above it. Fortunately no one was hurt in the explosion of a butane torch refill container...container, but almost everyone agrees we dodged a bullet in that regard. As a result of the incident, Clubhouse...you have a torch of this kind and plan to use it in the jewelry classroom, you need to see Neal or one...bearing and would extend the usable storage space in the attic. That plan has been presented to and accepted...your Board of Directors, and Neal Immega will be in charge of acquiring the needed materials and people |
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| France contains surface exposures of rocks ranging in age from Silurian to Recent. Silurian graptolitic...by two visits paid by the Geologists' Association, in 1878 and 1923, and by the subsequent reports of Barrois...This account was written in preparation for further visits by the Association in May 1967; it is not intended...intended to repeat details included in the earlier reports, but rather to emphasise the continuity of the...the geological history of the area in terms of its changing environments. Reference will be made to much |
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| ׀InColor 3 Issue 41 ׀InColor 91 Contents 20 In Side 5 6 8 18 20 30 40 48 56 62 66 70 72 78 88...Members Industry News A Look At What’s Making News in the Colored Gemstone and Jewelry Industry Background...tourmaline American Gemstones – What They Are and (in the Library of William F. Larson). The kunWhere They...are Found zite (201 cts) is from the Oceanview Mine in Southern California; the 0.72-ct benitoite (left...Benito County, California; the group of sapGems Found in the U.S. State of Maine phires is from the Gem Mountain |
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| BONUS! a = apace ———— “The Unseen World Around Us,” in r @ isive lists of fluo cluding pone pine a Ss ai...engineer ing principles Combines long and short wave in one unit Rugged all metal housing Extra large filters...compartment, SAFE for changing tubes. Ex eptior al in this price range) nly 5 lbs. Size 3 eS x 20” @® Weight...Federation DECEMBER, EDITOR'S MEMO PAD What to put in a magazine. Rip Rap, and interesting letters to the... 213 GEOLOGY AN INFANT SCIENCE John S. Albanese In proportion to its importance if is surprising how |
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| ist der Bezugspreis DM 66.-. Die Zustellgebuhr ist in den Jeweiligen Preisen enthalten . Schriftleiter:...Redaktion: Hans Damrau . Göttingen Fu r den In alt der in diesem Heft verolfentlichten Abhandlungen sind...durchsichtiger Spaltwürfel von Steins a 1z (NaCl) in Silbemitratlösung bestimmter Konzentration gelegt...Sekundärkriställchen können sich zum Primärkristall in mehr oder minder paralleler Orientierung befinden...r p h o s e n'' hat bereits Rene Just HAÜY (1801) in seinem Traite de Mineralogie" verwendet. Ausgehend |
 | Thibault, Nicolas, Ruhl, Micha, Ullmann, Clemens V., Korte, Christoph, Kemp, David B., Gröcke, Darren R., Hesselbo, Stephen P. (2018) The wider context of the Lower Jurassic Toarcian oceanic anoxic event in Yorkshire coastal outcrops, UK. Proceedings of the Geologists' Association, 129 (3) 372-391 doi:10.1016/j.pgeola.2017.10.007 | Journal (article/letter/editorial) |
| the Lower Jurassic Toarcian oceanic anoxic event in Yorkshire coastal outcrops, UK Nicolas Thibaulta...O Article history: Received 28 May 2017 Received in revised form 24 October 2017 Accepted 24 October...prominent negative carbon-isotope excursion (CIE) in marine carbonate and organic matter, and numerous...less constrained. The T-OAE is intensively studied in the Cleveland Basin, Yorkshire, UK, whose sedimentary...indicative of 405 kyr eccentricity cycles in Yorkshire. Trends in total organic carbon and redox-sensitive |
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| ^eienr^ed Digitized by the Internet Archive in California 2011 with funding from Academy of...responsible for the facts to and opinions contained in their respective papers. It is requested that all...responsible for the facts to and opinions contained in their respective papers. It is requested that all...Society, CONTENTS. PART I. On I. Wealden District and of By William Hopkins, Esq., M.A., F.R.S....p. II. Remains of Bidental and other Reptiles in South p. 53 Genus of Reptilia (Dicynodon), and |
Samer, Kothgraben, Kleinfeistritz, Weißkirchen in Steiermark, Murtal District, Styria, Austria