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| ORTHOPYROXENE AND ITS BEARING ON THE PETROGENESIS OF ULTRAMAFIC IN SANGUN AND JOETSU ZONES ROCKS SHOJI ARAI...distributed in the central part of the Chugoku district and in northern Kyushu. It can be interpreted...peridotites. In Joetsu region, central Japan, ultramafic complexes are also invaded by large amounts of...and petrogenesis of ultramafic complexes in the central part of the Chugoku district (Arai, 1973a, b) may...and lherzolite in orogenic belts, characterizes ultramafic rocks in Kamuiko tan, Joetsu, and Sangun metamorphic |
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| geol·ogy Occurrence of refractory clay in Randolph County, W.Va., by K. J. Englund and H. J. Goett______________________...minerals and rocks from the Red Mountain-Del Puerto ultramafic mass, California, by G. R. Himmelberg and...a rutile- and apatite-bearing ultramafic chlorite rock, Harford County, Md., by D. L. Southwick_______...part of Upper Cretaceous Mancos Shale, Slick Rock district,Colorado, by D. R. Shawe ____________________...Formation (Paleocene) in southeastern Hardeman County, Tenn., by S. M. Herrick and D. R. Rima------- |
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| three major members: basaltic volcanics, mafic-ultramafic cumulates, and residual peridotite. From the...mantle. Introduction Basaltic volcanics, mafic-ultramafic cumulates, and residual peridotite are the three...peridotite is directly reflected in the chemistry of spinel in the associated basalt. This paper is intended...succession including basaltic volcanics, mafic-ultramafic cumulates, and residual peridotite (Fig. 1 b)...a Distribution of the Permian Yakuno ophiolite (black) in the Inner Zone of Southwest Japan. Older dismembered |
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| 7 257989 R q549 PEMBERTON, H.E MINERALS OF CALIFORNIA P 2995 IpSl q 49 f 07. 257889 ^ pe B T...org/details/mineralsofcalifoOOpemb MINERALS OF CALIFORNIA MINERALS OF CALIFORNIA H. Earl r i L ] Pemberton ...H. Earl, 1907Minerals of California. An updating of: Minerals of California: 1866-1966 / by Joseph Murdoch...Includes index. 1. Mineralogy -California. 2. Mines and mineral resources- California. I. Murdoch, Joseph, 1890Minerals...1890Minerals of California. II. Title. centennial volume, QE375.C32P45 ISBN 0-442-27488 2 549.9794 |
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| MINERALS OF CALIFORNlA 299" 257889 PEMBERTON' HOFE CALIFORNIA MINERALS 2995 SEP 1933 OINCO Digitized by...org/details/mineralsofcalifo00pemb MINERALS OF CALIFORNIA - MINERALS OF CALIFORNIA H. Earl Pemberton ~ VAN NOSTRAND...H. Earl, 1907Minerals of California. An updating of: Minerals of California: centennial volume, 1866-1966...index. 1. Mineralogy - California. 2. Mines and mineral resources - California. I. MUidoch, J oseph, 1890Minerals...1890Minerals of California. 11. Title. QE375.C32P45 549.9794 81-15963 ISBN 0-442-274882 AACR2 Preface |
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| inclusions occur in serpentinite-matrix mdlange. The spinel lherzolite is characterized by a mylonitic textur€...map of the Klamath Moutrtains, California and Oregon. The ultramafic-mafic rocks which constitute these...The Preston Peak ophiolite consists of a basal ultramafic sheetoverlain and intruded by a mafic complex...fragmented upper part of the ophiolite (Fig. 2). The ultramafic sheetwhich lies directly above a regional thrust...magma (Snoke, 1977).Mafic rocks occur in the ultramafic rocks both as discrete dikes with chilled margins |
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| possible spine1 compositions to green MgAl,O1-rich spinel. The Al-content is governed by P-, T-, and fH10-8emitiVe...spine1 are a function of Cr, Al and Fe * in the spinel, and the ratio Mg/Few in coexisting silicates....progressive regional and contact metamorphism of ultramafic rocks, mostly serpentinites, and to the nature...the literature on altered or metamorphic chrome-spinel, in which zoning is conspicuous, we are concerned...extent control the occurrence and composition of spinel, as will be demonstrated below, the sequence of |
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| Acknowledgement s General geologic description Ultramafic rocks Lherzolitic series Dunite-lherzolite Olivine-diopside...thopyroxene Clinopyroxene Plagioclase Amph ibo 1 e Spinel Magnetites and ilmenites Petrology Whole-rock chemistry...proximity to the Josephine ultramafic complex (black) in the Klamath Mountain geologic province Generalized...Kalmiopsis Wilderness area Classification of ultramafic rocks with and without hornblende Geologic map...section [in pocket] Ternary modal diagrams of ultramafic rocks of wehrlitic (circles) and Iherzolitic |
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| Metamorphosed Dunite-Harzburgite Complex in the Chugoku District, Western Japan Shoji Arai Geological Institute...Accepted June 3, 1975 Abstract. The Tari-Misaka ultramafic complex, which is emplaced into the Paleozoic...has an assemblage, olivine ~ cordierir ~ Mg-AI spinel (Mg/Mg ~ Fe ~+, more than 0.9). Enstatite is rare...rare and coexists with less magnesian Mg-A1 spinel (Mg/Mg ~- Fe 2+, less than 0.9). Petrological and mineralogical...mineralogical characters of the ultramafic rocks can be well explained by thermal metamorphism of strongly |
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| History of the Basal Alpine-Type Peridotite, Red Mountain, New Zealand by JOHNM. SINTON Department of...October 1976) ABSTRACT INTRODUCTION T H E Red Mountain ultramafic massif of northwest Otago and south Westland...unaltered 5 x 8 km exposure of part of the Dun Mountain Ophiolite Belt (Coombs et al., 1973,1976). Peridotite...Peridotite bodies from the Nelson sector of the Dun Mountain belt have been described by Lauder (1965), Challis...University of Arizona on September 6, 2015 The Red Mountain alpine peridotite forms the basal, dominantly |
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| in the Preston Peak area, Klamath Mountains, California ARTHUR W. SNOKE Department of Geology, University...In the Preston Peak area, Klamath Mountains, California, a regional thrust fault separates metasedimentary...rocks. The ophiolite consists of a basal sheet of ultramafic tectonite overlain and intruded by a heterogeneous...major temporal hiatus separating the tectonitic ultramafic rocks and the associated mafic rocks. Mineral...Mineral assemblages and textures in the ultramafic rocks suggest high-temperature recrystallization and penetrative |
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| Metamorphosed Chromite-Bearing Ultramafic Rocks from the Red Lodge District, Montana U.S. GEOLOGICAL SURVEY...Metamorphosed Chromite-Bearing Ultramafic Rocks from the Red Lodge District, Montana By PATRICIA J. LOFERSKI...of upper amphibolite facies chromite-bearing ultramafic rocks U.S. GEOLOGICAL SURVEY BULLETIN 1626 CONTRIBUTIONS...metamorphosed chromite-bearing ultramafic rocks from the Red Lodge District, Montana. (Contributions to...1626-B 1. Rocks, Ultrabasic. 2. Chromite Montana Red Lodge Region. I. Title. II. Series. III. Series: |
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| Director of the U. S. Geological Survey. Menlo Park, California April,1977 ROBERT G. CoLEMAN Contents Part...used to describe various kinds of serpentinized ultramafic rocks. Serpentinization being a process that...concerning ophiolitic zones in the Mediterranean mountain chains, Steinmann (1927) introduced a remarkable...follows: "First the main body of the ultrabasic mass solidifies as peridotite, then follows the gabbro...adequately explain the association of mafic and ultramafic rocks within alpine orogenic zones. During this |
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| River Formation (Early? and Middle Eocene), King County, Washington U.S. GEOLOGICAL SURVEY BULLETIN 2085-A...Green River Gorge near Kanaskat, southeastern King County, Washington. Photograph by Samuel Y. Johnson, July...River Formation (Early? and Middle Eocene), King County, Washington By Samuel Y. Johnson and Joseph T...River Formation (Early? and Middle Eocene), King County, Washington/by Samuel Y. Johnson and Joseph T....Stratigraphic Eocene. 2. Geology Washington (State) King County. 3. Raging River Formation (Wash.) I. O'Connor |
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| 232-268] PETROLOGY OF ULTRAMAFIC AND GABBROIC ROCKS OF THE CANYON MOUNTAIN OPHIOLITE, OREGON GLEN R...Geological Survey, Menlo Park, California, 94025 ABSTRACT. The Canyon Mountain Complex of northeastern Oregon...tectonite and metacumulates suggest that the Canyon Mountain harzburgitc is the residuum of the partial melting...produced the overlying igneous rocks. The Canyon Mountain Complex most likely formed in an island arc tectonic...at a midocean ridge. 1:-/TRODUCTION The Canyon Mountain Complex of northeastern Oregon (fig. 1), 17 to |
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| Petrology of the Alpine-type Peridotite at Burro Mountain, California, U.S.A.1 by R. A. LONEY, G. R. HIMMELBERG... COLEMAN U.S. Geological Survey, Menlo Park, California, U.S.A. (Received 3 September 1969; in revised... ABSTRACT The alpine-type peridotite at Burro Mountain is a partially serpentinized harzburgitedunite...Upper Cretaceous) of the southern Coast Ranges of California. The peridotite is bounded on the east by a vertical...greenstone, amphibolite, and blueschist, as well as ultramafic rocks, and represent a wide range of pressure-temperature |
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| 1965. 1966. 1967. 1968. Numerous Federal, State, county, and local agencies and other organizations and..._-_-__ Arizona__ _-_-_-__-__-___-__-_--_-___ California. _ __________________________ Colorado _____...___-_--___--_---------53 Southeastern Alaska._______------_----54 Puerto Rico .____--_-_--_--------------55 Geologic maps...-----65 Florida________________-------------67 Puerto Rico ________--__----------_67 Midcontinent region...Arkansas-_________----_--------------72 Rocky Mountain region-__ -----72 Montana.________--__----------------73 |
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| A253-A258 of this chapter. Numerous Federal, State, county, and municipal agencies and other organizations...___--__Southeastern Alaska____--____--________ Puerto Rico _________________________ Geologic maps__...____________---_--__Florida___._________________-_ Puerto Rico___________-_-_-_-___----Midcontinent region...investigations Continued Water resources Continued Rocky Mountain region_--__________________ Montana _________...____ Oregon ________________________________ California. _____________________________ Idaho- _ __ _________ |
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| to Superintendent of Documents.) MENLO PARK, California Bldg. 3, Rm. 3128, 345 Middlefield Rd. RESTON...indicate chapters] Page 1. Petrology of the Canyon Mountain Complex, eastern Oregon 1 William P. Leeman...Richard J. Arculus 2. A closer look at the Bald Mountain batholith, Elkhorn Mountains, and some comparisons...northeastern Oregon 211 Ellen M. Bishop 5. Mafic and ultramafic rocks of the Baker terrane, eastern Oregon, and...implications of U-Pb zircon ages of the Canyon Mountain Complex, Sparta complex, and related metaplutonic |
