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OUTLINE

Virginia T. McLemore, New Mexico Bureau of Geology and Mineral Resources, New Mexico Institute of Mining and Technology, Socorro, NM 87801 ginger@gis.nmt.edu. GEOLOGY AND MINERAL DEPOSITS OF THE GALLINAS MOUNTAINS REE DEPOSIT, LINCOLN AND TORRANCE COUNTIES, NEW MEXICO, USA. Introduction

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OUTLINE

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  1. Virginia T. McLemore, New Mexico Bureau of Geology and Mineral Resources, New Mexico Institute of Mining and Technology, Socorro, NM 87801 ginger@gis.nmt.edu GEOLOGY AND MINERAL DEPOSITS OF THE GALLINAS MOUNTAINS REE DEPOSIT, LINCOLN AND TORRANCE COUNTIES, NEW MEXICO, USA

  2. Introduction • Methods • Mining and exploration history • Geology • Petrochemistry of the igneous rocks • Description of mineral deposits • Mineral zoning and paragenesis • Preliminary conclusions and resource potential OUTLINE

  3. Funded by the NMBGMR Much of the geochemical analyses were by USBM (Russ Schreiner) New geochemical analyses were funded by Strategic Resources, Inc. ACKNOWLEDGMENTS

  4. INTRODUCTION

  5. USGS SIR10-5220

  6. METHODS

  7. Published and unpublished data were inventoried and compiled on existing mines and prospects within the Gallinas Mountains • A geologic map was compiled in ARCMAP@ by modifying Kelley et al. (1946), Perhac (1961, 1970), Fulp and Woodward (1991), Korzeb and Kness (1992), Schreiner (1993), and field reconnaissance by the author (1980, 2009-2010). • Samples were collected and analyzed and compared with published data (McLemore, 2010). • Igneous rock lithologies were identified on the basis of mineralogy and chemistry as defined by LeMaitre (1989). METHODS

  8. Mining and exploration history

  9. Mineral Production

  10. Mines and prospects in the Gallinas Mountains, Lincoln County

  11. GEOLOGY

  12. North American Cordilleran Belt of Alkaline Igneous Rocks

  13. Geologic Map of the Gallinas Mountains, Lincoln and Torrance Counties, New Mexico (Modified From Kelley et al., 1946; Kelley, 1949, 1971; Perhac, 1961, 1970; Woodward and Fulp, 1991; Schreiner, 1993; Field Reconnaissance by the Author)

  14. Aeromagnetic Map of the Gallinas Mountains Area, from Kucks et al. (2001)

  15. The Gallinas Mountains trachyte was dated by K/Ar methods as 29.9 Ma (Perhac, 1970).

  16. PETROCHEMISTRY

  17. REE-F veins (131 samples) Cu-REE-F veins (65 samples) Breccia pipe deposits (58 samples) Iron skarns (6 samples)

  18. Description of mineral deposits

  19. MINEral zoning

  20. Paragenesis

  21. Schematic model of formation of the mineral deposits in the Gallinas Mountains, Lincoln County, New Mexico (modified in part from Schreiner 1993; Richards, 1995; Williams-Jones et al., 2000).

  22. In 1991-1992, USBM calculated an inferred resource of 0.487 million metric tons with a grade of 2.95% total REE.

  23. More chemical analyses of the igneous rocks • Determination of age of igneous rocks • Continuation of USBM preliminary investigation of the alteration • Drilling to delineate deposits in the subsurface • Petrography • Alteration • Chemistry • Mineralogy ADDITIONAL REsearch

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