Mineral Deposits of Lincoln County, New Mexico

Total Page:16

File Type:pdf, Size:1020Kb

Mineral Deposits of Lincoln County, New Mexico BULLETIN 67 Mineral Deposits of Lincoln County, New Mexico by GEORGE B. GRISWOLD 1959 STATE BUREAU OF MINES AND MINERAL RESOURCES NEW MEXICO INSTITUTE OF MINING & TECHNOLOGY CAMPUS STATION SOCORRO, NEW MEXICO NEW MEXICO INSTITUTE OF MINING & TECHNOLOGY E. J. Workman, President STATE BUREAU OF MINES AND MINERAL RESOURCES Alvin J. Thompson, Director THE REGENTS MEMBERS Ex OFFICIO The Honorable John Burroughs ............................ Governor of New Mexico Tom Wiley .................................................. Superintendent of Public Instruction APPOINTED MEMBERS Holm 0. Bursum, Jr. ........................................................................ Socorro Thomas M. Cramer ......................................................................... Carlsbad Frank C. DiLuzio .................................................................... Albuquerque John N. Mathews, Jr. ....................................................................... Socorro Richard A. Matuszeski ............................................................ Albuquerque For sale by the New Mexico Bureau of Mines & Mineral Resources Campus Station, Socorro, N. Mex. — Price $2.50 Contents Page ABSTRACT ....................................................................................................... 1 INTRODUCTION .......................................................................................... 2 Purpose and scope ....................................................................................... 2 Method of investigation .............................................................................. 2 Previous work ............................................................................................... 2 Acknowledgments ........................................................................................ 3 GEOGRAPHY ................................................................................................ 4 Location ......................................................................................................... 4 Topography ................................................................................................... 4 Climate and vegetation ................................................................................ 4 GEOLOGY ...................................................................................................... 6 Introduction .................................................................................................. 6 Stratigraphy ................................................................................................... 6 Precambrian rocks .................................................................................... 6 Sedimentary rocks ..................................................................................... 6 Ordovician ............................................................................................. 6 Silurian and Devonian ......................................................................... 9 Pennsylvanian ........................................................................................ 9 Permian .................................................................................................. 9 Triassic ................................................................................................. 11 Jurassic .................................................................................................. 11 Cretaceous ........................................................................................... 11 Tertiary ................................................................................................. 12 Quaternary ........................................................................................... 12 Igneous rocks ........................................................................................... 13 Tertiary volcanic rocks ....................................................................... 13 Tertiary intrusive rocks ...................................................................... 13 Quaternary basalt ................................................................................ 14 Structural features ...................................................................................... 14 MINING IN LINCOLN COUNTY........................................................... 16 History ......................................................................................................... 16 Production ................................................................................................... 17 Page MINERAL DEPOSITS ................................................................................ 23 Geographic distribution ............................................................................ 23 Classification ............................................................................................... 23 Mineralogy ................................................................................................... 23 Future possibilities ..................................................................................... 24 DESCRIPTIONS OF DEPOSITS ............................................................. 26 White Oaks district .................................................................................... 26 General ..................................................................................................... 26 Geology .................................................................................................... 26 Descriptions of mines ............................................................................ 30 Old Abe mine ...................................................................................... 30 South Homestake mine ..................................................................... 34 Little Mack and Henry Clay mines .................................................. 38 North Homestake mine ..................................................................... 39 Other mines ......................................................................................... 40 Tungsten ................................................................................................... 40 Placer gold deposits ................................................................................ 41 Nogal district .............................................................................................. 41 General ..................................................................................................... 41 Geology .................................................................................................... 41 Descriptions of mines and prospects .................................................. 43 Parsons mine ....................................................................................... 43 Helen Rae and American mines ....................................................... 45 Vera Cruz mine ................................................................................... 50 Renowned mine .................................................................................. 53 Mayberry mine .................................................................................... 54 Rialto prospect .................................................................................... 57 Other mines and prospects ............................................................... 60 Gallinas district ........................................................................................... 64 General ..................................................................................................... 64 Geology .................................................................................................... 64 Descriptions of mines and prospects .................................................. 65 Old Hickory mine ............................................................................... 66 Conqueror (Rio Tinto) mine ............................................................. 66 All American mine ............................................................................. 68 Red Cloud and Conqueror No. 9 claims ........................................ 68 Other deposits .................................................................................... 71 Origin of breccia zones ..................................................................... 71 iv Page Schelerville (West Bonito) district .............................................................71 General ..................................................................................................... 71 Geology .................................................................................................... 73 Descriptions of mines and prospects ...................................................73 Homestake mine ................................................................................ 73 Commercial mine ............................................................................... 74 Junction mine ...................................................................................... 75 Idaho mine ........................................................................................... 75 New Mexico Copper Corp. claims .................................................. 76 Jicarilla district ..............................................................................................77 General ....................................................................................................
Recommended publications
  • Cultural Resources Overview Desert Peaks Complex of the Organ Mountains – Desert Peaks National Monument Doña Ana County, New Mexico
    Cultural Resources Overview Desert Peaks Complex of the Organ Mountains – Desert Peaks National Monument Doña Ana County, New Mexico Myles R. Miller, Lawrence L. Loendorf, Tim Graves, Mark Sechrist, Mark Willis, and Margaret Berrier Report submitted to the Wilderness Society Sacred Sites Research, Inc. July 18, 2017 Public Version This version of the Cultural Resources overview is intended for public distribution. Sensitive information on site locations, including maps and geographic coordinates, has been removed in accordance with State and Federal antiquities regulations. Executive Summary Since the passage of the National Historic Preservation Act (NHPA) in 1966, at least 50 cultural resource surveys or reviews have been conducted within the boundaries of the Desert Peaks Complex. These surveys were conducted under Sections 106 and 110 of the NHPA. More recently, local avocational archaeologists and supporters of the Organ Monument-Desert Peaks National Monument have recorded several significant rock art sites along Broad and Valles canyons. A review of site records on file at the New Mexico Historic Preservation Division and consultations with regional archaeologists compiled information on over 160 prehistoric and historic archaeological sites in the Desert Peaks Complex. Hundreds of additional sites have yet to be discovered and recorded throughout the complex. The known sites represent over 13,000 years of prehistory and history, from the first New World hunters who gazed at the nighttime stars to modern astronomers who studied the same stars while peering through telescopes on Magdalena Peak. Prehistoric sites in the complex include ancient hunting and gathering sites, earth oven pits where agave and yucca were baked for food and fermented mescal, pithouse and pueblo villages occupied by early farmers of the Southwest, quarry sites where materials for stone tools were obtained, and caves and shrines used for rituals and ceremonies.
    [Show full text]
  • Silver and Gold Occurrences in New Mexico by Robert M
    New Mexico Bureau of Mines & Mineral Resources Resource Map 15 March 1986 Silver and gold occurrences in New Mexico by Robert M. North and Virginia T. Mclemore New Mexico Bureau of Mines and Mineral Resources, Socorro, New Mexico 87801 Abstract Anomalous amounts of silver and/or gold have been identified in 153 mining districts or prospect areas of New Mexico. Production from most of these occurrences has been small; figures or estimates are given when known. Thirty-five districts have produced in excess of 10,000 troy ounces of gold or 200,000 ounces of silver. Silver and gold in New Mexico occur in 14 distinct types of deposits ranging in age from Precam­ brian (Proterozoic) to Recent. Mid-Tertiary to Recent deposits include the placer, volcanic-epithermal, supergene copper-uranium (silver), and Great Plains Margin types. Late Cretaceous to mid-Tertiary deposits include the sedimentary-hydrothermal barite-fluorite-galena, carbonate-hosted silver (lead­ manganese ), lead-zinc and copper skarn, Laramide vein, and prophyry-copper types. Late Paleozoic to early Mesozoic deposits include the sedimentary-copper type and possibly some of the Permian Mississippi Valley type. Precambrian deposits include the vein and replacement and Precambrian massive-sulfide types. Deposits that have produced significant silver and/or gold as the primary product are the placer, volcanic-epithermal, Great Plains Margin, carbonate-hosted silver, and Lar­ amide vein types. Deposits that have produced significant precious metals as a byproduct of base­ metal mining include the carbonate-hosted lead-zinc, copper skarn, and porphyry-copper types. Introduction Precious metals in varying degrees of importance or 14 ppm (0.41 oz/ton) silver.
    [Show full text]
  • Burned the Crucifixes and Other Religious Objects That Had Been Scattered in and Around the Pueblo. Otermin's Army Repeated This
    burned the crucifixes and other religious objects not successful in reestablishing Spanish rule of that had been scattered in and around the the Pueblos, the interviews and explorations pueblo. Otermin's army repeated this ritual at Otermin and Mendoza conducted give the most Alamillo and Sevilleta. A short distance from complete picture of the effects of the revolt Sevilleta the army found deep pits where the among the pueblos. The Spanish presidio at El Indians had cached corn and protected it with a Paso sent two more punitive expeditions to New shrine of herbs. feathers and a clay vessel Mexico in 1688 and 1689 but it was not until the modeled with a human face and the body of a toad term of Governor Don Diego de Vargas (1690-1696) (Hackett and Shelby 1942:I:cxxix). On the march that New Mexico was reclaimed by Spain. from Socorro to Isleta. the army passed through the burned remains of four estancias. The The Aftermath of the Revolt estancia of Las Barrancas, located 23 leagues beyond Senecu and ten leagues downstream from Documentation of the 12-year period following the Isleta, was the only estancia that had not been Pueblo Revolt is scarce but speculation and greatly vandalized and burned (Hackett and Shelby conjecture abound. The more dramatic recon­ 1942:cxxx). structions of life among the Pueblos after the revolt show the Pueblos having destroyed every Otermin staged a surprise attack, taking Isleta vestige of Hispanic culture, including household Pueblo on December 6, 1681. About 500 Isleta and and religious objects, domesticated animals and Piro Indians were living in the village at the cereal crops.
    [Show full text]
  • Mineral and Energy Resources of the BLM Roswell Resource Area, East-Central New Mexico
    U. S. DEPARTMENT OF THE INTERIOR U. S. GEOLOGICAL SURVEY Mineral and Energy Resources of the BLM Roswell Resource Area, East-central New Mexico by Susan Bartsch-Winkleri, editor Open-File Report 92-0261 1992 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 1 Denver, Colorado iMail Stop 937 Federal Center P.O. Box 25046 Denver, Colorado 80225 MINERAL AND ENERGY RESOURCES OF THE BLM ROSWELL RESOURCE AREA, EAST-CENTRAL NEW MEXICO Summary.......................................................................................... 1 Introduction.................................................................................... 1 Location and geography of study area...................................... 1 Purpose and methodology........................................................ 3 Acknowledgements......................................................................... 4 Geology of east-central New Mexico, by Susan Bartsch-Winkler, with a section on Intrusive and extrusive alkaline rocks of the Lincoln County porphyry belt by Theodore J. Armbrustmacher 4 General..................................................................................... 4 Structure................................................................................. 5 Uplifts........................................................................
    [Show full text]
  • Bulletin 39: the Metal Resources of New Mexico and Their Economic
    BULLETIN 3 9 The Metal Resources of New Mexico and Their Economic Features Through 1954 A revision of Bulletin 7, by Lasky and Wootton, with detailed information for the years 1932-1954 BY EUGENE CARTER ANDERSON 1957 STATE BUREAU OF MINES AND MINERAL RESOURCES NEW MEXICO INSTITUTE OF MINING & TECHNOLOGY CAMPUS STATION SOCORRO, NEW MEXICO NEW MEXICO INSTITUTE OF MINING & TECHNOLOGY E. J. Workman, President STATE BUREAU OF MINES AND MINERAL RESOURCES Alvin J. Thompson, Director THE REGENTS MEMBERS EX OFFICIO THE HONORABLE EDWIN L. MECHEM………...Governor of New Mexico MRS. GEORGIA L. LUSK ......................Superintendent of Public Instruction APPOINTED MEMBERS ROBERT W. BOTTS ....................................................................Albuquerque HOLM O. BURSUM, JR. .....................................................................Socorro THOMAS M. CRAMER .................................................................... Carlsbad JOHN N. MATHEWS, JR. ...................................................................Socorro RICHARD A. MATUSZESKI ......................................................Albuquerque Contents Page INTRODUCTION .......................................................................................................... 1 Purpose and Scope of Bulletin ..................................................................................... 1 Other Reports Dealing With the Geology and Mineral Resources of New Mexico ......................................................................................................
    [Show full text]
  • Features of the Tularosa Basin Place Names in New Mexico, As You Might Imagine, Often Derive from Native American, Spanish, and Anglo Words and Family Names
    National Park Service White Sands Department of the Interior White Sands National Monument Features of the Tularosa Basin Place names in New Mexico, as you might imagine, often derive from Native American, Spanish, and Anglo words and family names. The Tularosa Basin is no exception—the word “tularosa” is Spanish for “reddish reeds.” Like much of the American Southwest, the basin is full of such colorful place names. Below you’ll find a description of the most significant features, arranged to correspond with the accompanying map. The Chupadera Mesa is an upland rising at the north end of the Tularosa Basin. Chupadera probably refers to “sinkholes”—although geographer T. M. Pearce says that it could also refer to “sucking insects.” Chupadero The Oscura Mountains form the northwest border of the Tularosa Mesa basin. Oscura means “dark” in Spanish, and with their piñon and juniper forested tops, the Oscura Mountains can appear darker than the neighboring San Andres Mountain range to the south. The highest elevation in the range is Oscura Peak at 8,732 feet high. The San Andres Mountains border the Tularosa Basin on the west. The range extends approximately 75 miles north to south. The highest Oscura point is Salinas Peak, with an elevation just under 9,000 feet. The Mountains southern San Andres Mountains are home to a wildlife refuge of the same name. However, the San Andres National Wildlife Refuge and the San Andres Mountains are within the boundaries of the White * Carrizozo Sands Missile Range and therefore closed to public access. The Oscura Mountains to the north are separated from the San Andres range at Mockingbird Gap, while the Organ Mountains to the south are separated from the San Andres by San Augustin Pass.
    [Show full text]
  • Magmatic Activity and Mineralization Along the Capitan, Santa Rita, And
    New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/60 Magmatic activity and mineralization along the Capitan, Santa Rita, and Morenci lineaments in the Chupadera Mesa area, central New Mexico McLemore, Virginia T., Zimmerer, Matthew, 2009, pp. 375-386 in: Geology of the Chupadera Mesa, Lueth, Virgil; Lucas, Spencer G.; Chamberlin, Richard M.; [eds.], New Mexico Geological Society 60th Annual Fall Field Conference Guidebook, 438 p. This is one of many related papers that were included in the 2009 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks.
    [Show full text]
  • Automated Landslide Hazard Detection September 2017
    UNM Earth Data Analysis Center New Mexico State Cooperating Technical Partner, FEMA Region 6 FY16-PM-MAS008 Mapping Activity Statement 006 Automated Landslide Hazard Detection September 2017 LiDAR Derived Landslide Products September 2017 Figures and Tables ........................................................................................................................................ ii Table of Abbreviations and Acronyms ......................................................................................................... iii Introduction .................................................................................................................................................. 1 The Study Areas ............................................................................................................................................ 1 The Santa Fe County Study Area ............................................................................................................... 1 Rio Hondo HUC-8 Watershed Study Area ................................................................................................. 3 Landslide Types ............................................................................................................................................. 5 Methodology ................................................................................................................................................. 6 Slope.........................................................................................................................................................
    [Show full text]
  • PDF Linkchapter
    Index [Italic page numbers indicate major references] Abajo Mountains, 382, 388 Amargosa River, 285, 309, 311, 322, Arkansas River, 443, 456, 461, 515, Abort Lake, 283 337, 341, 342 516, 521, 540, 541, 550, 556, Abies, 21, 25 Amarillo, Texas, 482 559, 560, 561 Abra, 587 Amarillo-Wichita uplift, 504, 507, Arkansas River valley, 512, 531, 540 Absaroka Range, 409 508 Arlington volcanic field, 358 Acer, 21, 23, 24 Amasas Back, 387 Aromas dune field, 181 Acoma-Zuni scction, 374, 379, 391 Ambrose tenace, 522, 523 Aromas Red Sand, 180 stream evolution patterns, 391 Ambrosia, 21, 24 Arroyo Colorado, 395 Aden Crater, 368 American Falls Lava Beds, 275, 276 Arroyo Seco unit, 176 Afton Canyon, 334, 341 American Falls Reservoir, 275, 276 Artemisia, 21, 24 Afton interglacial age, 29 American River, 36, 165, 173 Ascension Parish, Louisana, 567 aggradation, 167, 176, 182, 226, 237, amino acid ash, 81, 118, 134, 244, 430 323, 336, 355, 357, 390, 413, geochronology, 65, 68 basaltic, 85 443, 451, 552, 613 ratios, 65 beds, 127,129 glaciofluvial, 423 aminostratigraphy, 66 clays, 451 Piedmont, 345 Amity area, 162 clouds, 95 aggregate, 181 Anadara, 587 flows, 75, 121 discharge, 277 Anastasia Formation, 602, 642, 647 layer, 10, 117 Agua Fria Peak area, 489 Anastasia Island, 602 rhyolitic, 170 Agua Fria River, 357 Anchor Silt, 188, 198, 199 volcanic, 54, 85, 98, 117, 129, Airport bench, 421, 423 Anderson coal, 448 243, 276, 295, 396, 409, 412, Alabama coastal plain, 594 Anderson Pond, 617, 618 509, 520 Alamosa Basin, 366 andesite, 75, 80, 489 Ash Flat, 364 Alamosa
    [Show full text]
  • THE STORY of MINING in New Mexico the Wealth Qjthe World Will B~ Jqund in New Mexico and Arizona
    Scenic Trips to the Geologic Past Series: No. 1-SANTA FE, NEw MEXICO No. 2-TAos-RED RIVER-EAGLE NEsT, NEw MEXICO, CIRCLE DRIVE No. 3-RoswELL-CAPITAN-Rumoso AND BoTTOMLEss LAKES STATE PARK, NEw MExiCo No. 4-SouTHERN ZuNI MouNTAINS, NEw MExico No. 5-SILVER CITY-SANTA RITA-HURLEY, NEw MEXICO No. 6-TRAIL GumE To THE UPPER PEcos, NEw MExiCo No. 7-HIGH PLAINS NoRTHEASTERN NEw MExico, RAToN- CAPULIN MouNTAIN-CLAYTON No. 8-MosAic oF NEw MExico's ScENERY, RocKs, AND HISTORY No. 9-ALBUQUERQUE-hs MouNTAINS, VALLEYS, WATER, AND VoLcANOEs No. 10-SouTHwEsTERN NEw MExico N 0. 11-CUMBRES AND T OLTEC. SCENIC RAILROAD No. 12-THE STORY oF MINING IN NEw MExiCo The wealth Qjthe world will b~ jQund in New Mexico and Arizona. -Baron vonHumboldt, 1803 Political Essay on New Spain S.cet1ic Trips lo the (1eologi<;Pas(. N9.12 New Mexico Buteau of Mines & MineNll Resources ADIVISIQN OF NEW ME)(lCO•INS'f!TtJTE OF MINING &TECHNOtOGY The Story of Mining in New Mexico 9Y p AIG.E W. CHRISTIANSEN .lllustcr:(t~d by Neila M., P~;arsorz . -· SocoRRo 1974 NEW MEXICO INSTITUTE OF MINING & TECHNOLOGY STIRLING A. CoLGATE, President NEW MEXICO BUREAU OF MINES & MINERAL RESOURCES FRANK E. KorrLOWSKI, Director BOARD OF REGENTS Ex Officio Bruce King, Governor of New Mexico Leonard DeLayo, Supen'ntendent of Public lnstrnction Appointed William G. Abbott, President, 1961-1979, Hobbs George A. Cowan, 1972-1975, Los Alamos Dave Rice, 1972-1977, Carlsbad Steve Torres, !967-1979, Socorro James R. Woods, !971-1977, Socorro BUREAU STAFF Full Time WILLIAM E.
    [Show full text]
  • Baylor Geological Studies
    G. Univ. of Texas at Arlington 76019US A BAYLORGEOLOGICA L FALL 1978 Bulletin No. 35 Evolution of the Southern High Plains JIMMY R. WALKER thinking is more important than elaborate FRANK PH.D. PROFESSOR OF GEOLOGY BAYLOR UNIVERSITY 1929-1934 Objectives of Geological Training at Baylor The training of a geologist in a university covers but a few years; his education continues throughout his active life. The purposes of train­ ing geologists at Baylor University are to provide a sound basis of understanding and to foster a truly geological point of view, both of which are essential for continued professional growth. The staff considers geology to be unique among sciences since it is primarily a field science. All geologic research in­ cluding that done in laboratories must be firmly supported by field observations. The student is encouraged to develop an inquiring ob­ jective attitude and to examine critically all geological concepts and principles. The development of a mature and professional attitude toward geology and geological research is a principal concern of the department. THE BAYLOR UNIVERSITY PRESS WACO, TEXAS BAYLOR GEOLOGICAL STUDIES BULLETIN NO. 35 Evolution of the Southern High Plains Jimmy R. Walker BAYLOR UNIVERSITY Department of Geology Waco, Texas Fall, 1978 C. L - Univ. of Texas at Tx. Studies EDITORIAL STAFF Jean M. Spencer, M.S., Editor environmental and medical geology O. T. Hayward, Ph.D., Advisor, Cartographic Editor urban geology and what have you Harold H. Beaver, Ph.D. stratigraphy, petroleum geology Gustavo A. Morales, Ph.D. invertebrate paleontology, micropaleontology, stratigraphy, oceanography Robert G. Font, Ph.D.
    [Show full text]
  • Geology and Placer-Gold Deposits of the Jicarilla Mountains, Lincoln County, New Mexico
    Geology and Placer-Gold Deposits of the Jicarilla Mountains, Lincoln County, New Mexico By KENNETH SEGERSTROM and GEORGE E. RYBERG GEOLOGICAL SURVEY BULLETIN 1308 A description of the geologic framework, extent, and grade of placer deposits of the area UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON 1974 UNITED STATES DEPARTMENT OF THE INTERIOR ROGERS C. B. MORTON, Secretary GEOLOGICAL SURVEY V. E. McKelvey, Director Library of Congress-catalog-card No. 74-600065 For sale by the Superintendent of Documents, U. S. Government Printing Office Washington, D. C. 20402- Price 45 cents (paper cover) Stock Number 2401-02502 CONTENTS Page Abstract................................................................. 1 Introduction . 1 Location, access, and population . 1 Topography, drainage, and water supply . 3 Climate . 3 Previous geologic studies . 4 Fieldwork . 4 Acknowledgments . 5 Sedimentary rocks . 5 Permian rocks . 6 Glorieta (?) Sandstone and San Andres Limestone . 6 Artesia Formation . 6 Triassic rocks . 7 Santa Rosa Sandstone . 7 Chinle Formation . 7 Cretaceous rocks . 8 Dakota Sandstone . 8 Mancos Shale . 8 Tertiary deposits . 8 Ogallala (?) Formation . 8 Quaternary deposits . 9 Tertiary igneous rocks . 10 Contact metamorphic rocks . 13 Structure . 14 Geomorphology . 15 Mineral deposits . 16 History and production . 16 Gold . 16 Iron and copper . 18 Mineralogy . 19 Occurrence, grade, and amount of placer gold . 21 Selected references . 24 ILLUSTRATIONS Page PLATE 1. Geologic map and sections of the Jicarilla Mountains, Lincoln County, New Mexico ............................................. In pocket FIGURE 1. Index map of New Mexico, showing counties and the area of this report .................................................... 2 III IV CONTENTS TABLES Page TABLE 1. Rapid-rock analyses of eight samples of unmineralized intrusive rock 10 2. Partial semiquantitative spectrographic analyses of 24 samples of un- mineralized intrusive rock .
    [Show full text]