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New Mexico Gold, Oro Grande, Mining Claims For Sale
Historic Big Burro Mountain, White Signal Mining District

Ore Grande Gold Claims MapOro Grande Placer Gold Claims
New Mexico gold placer claims for sale or possible interest in joint venture.

Owners Contact Info:
Robert Humphrey
Phone: 575-538-1089
E-Mail:
western@silvercity-nm.com

The recent re-discovery of a forgotten quarter-of-a-century old economic mining appraisal report has led to the formation of a new placer gold project in southwest New Mexico.
Three years of research and developmental effort have resulted in the re-establishment of 680 acres of placer gold claims situated on the site of a proposed large placer operation in 1987 . Previous claimants held the property for nearly thiry years and invested heavily in the pilot testing program just recently made available for viewing.   Data from this comprehensive appraisal indicates that mining the probable and possible reserves contained in this ore body were more than economically feasible even twenty-five years ago. Currently, 17-40 acre claims make up the Oro Grande claims group.  (Conservative estimates of economic value of both probable and possible ore bodies within the Oro Grande placer claims was calculated in 1987 at 36.5 million dollars at $450/oz). Please refer to appraisal report PDF for further information regarding economic value.

Location:
The Oro Grande project is located approximately twenty-five miles southwest of Silver City New Mexico within the boundaries of the Gila National Forest. The area enjoys a rich mining history and culture and the claims are fully encompassed by historic mining activity. The project area resides within the historic Burro Mountain mining district and lie less than seven miles south of the 35,000 acre open-pit Tyrone copper mine.  This mine complex currently produces over 115 million lbs of copper annually and is presently owned and operated by Freeport-McMoRan Copper & Gold. The claims also lie five miles to the west of the White Signal mining district, known for its historic gold, silver and uranium production. Fifteen hundred meters to the south of the Oro Grande claims lie the famous Gold Gulch placer fields that were known for their highest production phase during the 1930’s.  Two and a half miles to the southwest of the claims lie the Malone mining district, and a short distance further begins the Gold Hill mining district, both past producers of hard-rock and placer gold. 

The Oro Grande gold claims are accessible by road as seen in the photographs below.

Ore Grande gold claims access roadOre Grande gold claims access road
Ore Grande New Mexico Gold Claims

Plumas Mining equipmentGEOLOGY OF THE ORO GRANDE CLAIMS BLOCK AREA:
(
The selected text excerpts below borrowed from from a report titled MINERAL DEPOSITS AND STRUCTURAL PATTERN OF THE BIG BURRO MOUNTAINS, NEW MEXICO Gillerman, Elliot. Mineral Deposits and Structural Pattern of the Big Burro Mountains, New Mexico. University of Kansas, 1970.  New Mexico Geological Society Guidebook, 21st Field Conference pp. 115-120.
To view the entire report as a PDF CLICK HERE
)

GEOLOGICAL STRUCTURE -BIG BURRO MOUNTAINS

The Big Burro Mountains occupy the highest topographic and structural part of a complex northwesterly trending fault block. At least part of the block is tilted northeast-ward, and Precambrian and younger rocks constituting the block extend beneath Tertiary gravels in the Mangas Valley to the Mangas fault, which limits the block on the northeast. The Little Burro Mountains occupy a parallel north-easterly tilted block northeast of the Mangas Valley. The Mangas fault dips steeply southwestward.  The southwestern side of the Big Burro Mountain block is bounded by a narrow graben lying between the Taylor fault, which limits the Big Burro Mountain block, and the Malone fault which is the northeastern bounding fault of the Gold Hill block. A thick sequence of tilted Tertiary volcanic rocks, the Knight's Peak series, overlain by possibly as much as 2,500 feet of tilted Gila Conglomerate fill the graben. The Gold Hill block to the southwest consists of Precambrian rocks similar to those exposed in the Big Burro Mountain block, but includes many roof pendants and pods of older metamorphic rocks. Intrusive plugs or stocks are absent. It is believed to represent a higher part of the batholith than that which occupies the central Big Burro Mountains.

New Mexico Gold ClaimsMINERAL DEPOSITS -BIG BURRO MOUNTAINS

The Burro Mountain mining district enjoys a varied array of mineralization: gold, chalcopyrite, pyrite, silver minerals, bismuth minerals, sphalerite, galena, and molybdenite.  Magnetite and specular hematite are absent.  All but molybdenite have been produced commercially. Mineral deposits are mostly along major fractures such as the Osmer and Bismuth-Foster-Beaumont faults. Along the latter fault the character of mineralization changestoward the northeast from bismuth to sphalerite to silver minerals with molybdenite to chalcopyrite—a zonation suggestive of temperature control except for the anomalous molybdenum at the Beaumont shaft. High temperature minerals exist at either end with the lower temperature silver in the center.  Mineral deposits in the Big Burro Mountains are localized by structural features. The type, character, and intensity of mineralization can be better understood when related to the structural pattern. Intrusive activity, although important to mineralization, is also localized by structural features, and emphasizes the dependence of structural control on loci of mineralization.  As outlined in earlier reports (Gillerman, 1964, p. 38; 1967, p. 373) two distinct periods of primary mineralization have been identified in the Big Burro Mountains—dominantly base-metal mineralization in the Late Cretaceous or early Tertiary, and fluorite-gold mineralization in the late Tertiary. The first is post-stock intrusion, pre-volcanic activity. The later is post-vulcanism. Uranium mineralization is believed associated with the later period. A third period can also be distinguished—a Precambrian period characterized by pegmatites and contact metasomatic deposits in schists, probably associated with some phase of batholithic emplacement.

Ore Grande New Mexico Gold ClaimsThe early pegmatitic mineralization is characterized by zoned pegmatites containing minor amounts of rare-earth minerals, magnetite, and fluorite, in addition to the normal quartz, feldspar, and mica concentrations. The probably closely allied contact metasomatic deposits are confined to schists of the Bullard Peak series and contain scheelite andminor amounts of tourmaline and garnet. Both types of deposits are concentrated on the fringes of the Big Burro Mountains and are absent in the central area. They are most numerous to the north, south, and southwest.
Base-metal mineralization, characteristic of the Late Cretaceous or early Tertiary, includes silver and possibly some gold. Other metals deposited were copper, zinc, lead, molybdenum, iron, and bismuth. The mineral deposits are believed to be genetically associated with the Tyrone stock, the ore solutions being late differentiates of the magma which consolidated to form the quartz monzonite body. The character of mineralization differs in different areas within the mountains and as previously described (Gillerman, 1964, p. 39; 1967, p. 373) these differences can be correlated to a remarkable degree with the different blocks into which the mountains have been fragmented.

Tubes of gold"TUBES OF GOLD"

Recent conversations with two mining engineers involved in the original project in 1987 reveal that the free-milling placer gold on the claims fluctuates primarily within the 20-40 mesh range, but indications of the presence of a unique form of micro-gold in unexpected quantities may conceivably also exist on the property.

Documentation of the presence of this micro gold on these claims is revealed in an article published for the American Society for Applied Technology by the late Walter Lashley.  Mr. Lashley was one of eight independent assayers retained for services in the 1987 pilot testing and evaluation phase.  Through trial and error by various methods of assay, Mr. Lashley was able to identify and isolate this curious form of gold found on the property and set out to further understand the conditions for its geologic formation and economic potential.  This article describes the discovery and study of numerous specimens of these epigenetic deposits of microtubule forms of speudomorphic gold.  Additional evaluation involving these microtubules was provided by noted mineralogist Dr. Robert M. North from the New Mexico Institute of Mining and Technology.  Dr. North found these specimens so intriguing that he arranged to have them further assessed by a geophysicist working at the prestigious Los Alamos National Laboratories.  This geophysicist, Dr. Bart Olinger, happened to specialize in high-pressure crystallography and felt these unique specimens warranted additional scrutiny through the technology offered by scanning electron microscopathy.  Eighty-one micrographs were produced for the study through SEM at the Los Alamos National Laboratories.  These micrographs were instrumental in revealing an amazingly complex array of rare crystalline gold and may be viewed in the informative article entitled “Tubes of Gold” that we have provided in PDF.

Below is a list of the information PDF reports on this property:
Ore Grande New Mexico Gold Claims Claims Reference Map
Oro Grande Gold Claims Map
Appraisal Report
Metallurgical Investigation of Concentrates
Mineral Deposits and Structual Pattern of The Big Burro Mountains, New Mexico
Tubes of Gold

17 Oro Grande New Mexico Placer Gold Claims for sale or possible joint venture.
It is believed by the present claim owners (and as the original appraisal noted), that further exploratory work on the property is suggested in order to more fully understand the complete extent and character of the ore body. Present owners may be interested in collaborative efforts with second-hand parties interested in further testing for this purpose in a possible JV capacity.

Owners Contact Info:
Robert Humphrey
Phone: 575-538-1089
E-Mail:
western@silvercity-nm.com

 
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