Tertiary Gold Ore Description
PorterGeo Database
DETAILED DESCRIPTION The original Chimney Creek gold mine of the Twin Creeks operation is located about 60 km to the north-east of the town of Winnemucca, Humboldt County, in north-central Nevada. The ore deposit occurs on the eastern flank of the Dry Hills, the northern segment of the Osgood Mountains.
Alice Consolidated Mine – Western Mining History
Elevation: 3,376 Feet (1,029 Meters) Commodity: Lead, Silver Lat, Long: 47.4753, -115.84720 Map: View on Google Maps
Mother Lode Mine – Western Mining History
comments. comment (production): treasure box produced $10,000 per week in 1887.yosemite mine had produced $500,000 as of 1908. comment (development): flotation mill; compressor house; blacksmith shop; stamp mills. 7 - 11 claims comment (deposit): meade vein strikes n to n 20 deg e, dips 70 - 90 deg e; whistler vein strikes n, occident vein strikes ne; dips range 15 - …
Year 51 – 1911: The Tertiary Gravels of the Sierra …
This introductory section describes the nature and distribution of gold in the gravels, the methods of gold mining in California, and the production of gold by hydraulic, drifting, dredging, and surface mining for 1897-1909.
Gold and sulphide minerals in Tertiary quartz pebble …
The Belle-Brook and Parker Road gold placers are characterised by detrital gold and diagenetic sulphides exposed by small-scale alluvial gold mining in Tertiary to recent non …
Gold in placer deposits
California has produced more than 40 million troy ounces of gold from placers, both modern and fossil (Tertiary). The source of the great bulk of the gold is numerous quartz veins and …
HPGR
For gold ore operations, Polycom HPGR offers several attractive options all of which will help to improve the metallurgy of the gold and significantly improve operating costs: By shifting more of the particle liberation to the high …
Metallogeny of Gold in the Black Hills, South Dakota
For example, for the Tertiary sediment-hosted replacement deposits, Irving (1904) favored ore deposition from meteoric waters heated by the Tertiary igneous intrusions, whereas Connolly (1927) was a proponent of the magmatic-hydrothermal origin for the sediment-hosted replacement gold-silver deposits.
The distribution, characteristics and fluid sources of lode gold …
Lode gold deposits are among the most economically important types of gold deposits in the world. Globally, they formed mainly in three time intervals, 2.8 to 2.5 Ga, 2.1 to 1.8 Ga, and 700 Ma to the present. Sources of ore-forming fluids and other components are of critical importance in a better understanding of the genesis and the geodynamic controls of these …
Antimony Mines
Tertiary: Silver Tertiary: Gold. Location. State: Montana County: Sanders ... Material type: ORE Description: Cp_Grade: ^25.8% Sb. Deposit. Record Type: Site Operation Category: Producer ... Description: N - S Trending Anticline. Type: L Description: North Plunging Gently Rolling Folds. Large Ne Trending Fault Near The Portal Of The Barto Adit.
PorterGeo Database
Within the north-south elongated gold zone there are a series of Tertiary dykes of granodioritic composition, while a larger Tertiary granodioritic plug, apparently un-related to mineralisation, is found 1.5 km to the north. The property was owned by the Battle Mountain Gold Company in 1998, which has subsequently been incorporated into Newmont.
Tertiary Gold Bearing Channel Gravel California Mining
Tertiary Gold-Bearing Channel Gravel in Northern Nevada County, California. Geological Survey Circular 566 - 1968. Here is a great study done by the USGS on the Motherlode! Complete with Maps and Diagrams! Contents Include:
Simplified map displaying the distribution of the Tertiary gold
Pre-Tertiary to Tertiary gold deposits in Greece occur in awide range of genetic types including volcanic massive sulfides,o rogenic, intrusion-hosted,s karn, manto-, porphyry-a nd epithermal-type ...
Origin of gold in placer deposits of the Sierra Nevada …
Christensen re-introduces an alternative theory and mechanism to account for the high concentrations of placer gold nuggets in the Early Tertiary river sediments of California as well …
Goldbanks Gold Deposit – Western Mining History
Main ore host rocks are Tertiary basin sediments deposited about 17 million years ago. The best hosts for gold mineralization are permeable lithic sandstone and the polylithic breccia at the base of the basin sequence.
Three Kids – Western Mining History
Tertiary: Gold Tertiary: Copper Tertiary: Aluminum. Location. State: Nevada County: Clark District: Las Vegas . Land Status. Land ownership: Mixed ... Description: Crude Ore, Av Grade 20 Pct Mn 70274000 Metric Tons Year: 1960 Description: Crude …
Ruby-Gold
Description • The Ruby Mine offers an exceptional opportunity and outstanding value. Geological studies conclude that up to 4 miles of gold-bearing Tertiary Channels remain unmined within the Ruby. Channels like these can run over 100,000 ounces to the mile, so the 150,000 ounce placer gold resource potential estimates are conservative.
Gold Deposits and Their Geological Classification
The development of a simple classification scheme for gold deposits, as presented here, has been approached with a full appreciation that there are many difficulties associated with classification of ore deposits in general. In the case of lode gold deposits, contrasting classifications and nomenclatures have been arrived at historically ...
Where did the bulk of the placer gold in Tertiary river …
Where did the bulk of the placer gold in Tertiary river sediments in California come from?…maybe Nevada! This paper further expounds on this alternative theory of the origin of California placer …
PorterGeo Database
Descriptions of major ore deposits world wide. The Tonkin Springs group of deposits are located approximately 65 km to the north-west of the town of Eureka, 90 km south-east of Battle Mountain, and is within Eureka County in north-central Nevada, USA. They lie 18 km to the north of the Gold Bar orebody and 35 km to the south-east of the Cortez Gold Mine in the Battle …
Montgomery Prospect – Western Mining History
Comments. Comment (Geology): A Petrographic Study Of A Suite Of Samples Taken From The Ore Body Show The Average Density (From Six Samples) To Be 2.985 Grams Per Cubic Centimeter.The Aldridge-Prichard Formation, Of The Precambrian Belt Series Is Intruded By Numerous Diorite And Gabbro Sills Some Of Which Are As Much As 600 Meters Thick.
Sanger Mine
The following description of the deposit is taken from Lindgren (1901, p. 738-739) and a Department mine-file report compiled in the early 1900's by Charles P. Berkey. ... Gold Tertiary: Lead Tertiary: Zinc Tertiary: Copper. Location. State: Oregon County: Baker District: Eagle Creek . ... Gold Ore: Galena Ore: Pyrite Ore: Sphalerite Gangue ...
Hermosa Mine
Tertiary: Gold Tertiary: Molybdenum Tertiary: Lead Tertiary: Copper. ... ORE Description: Cp_Grade: ^20 Oz/T Ag. Deposit. ... " looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Arizona. Read more: Where to Find ...
Gold Bar Mine
Elevation: 3,399 Feet (1,036 Meters) Commodity: Gold Lat, Long: 34.08472, -112.56917 Map: View on Google Maps
ORE DEPOSITS OF THE JEROME AND BRADSHAW …
CONTENTS Page Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -1 History of mining ...
Meikle Mine
Comments. Comment (Commodity): Ore Materials: gold Comment (Commodity): Gangue Materials: pyrite, silica, dolomite,cinnabar, metacinnabar, barite, sphalerite, stibnite, calcite Comment (Deposit): This is an unusually high-grade deposit.Deposit is divided into a "flat sector," just below the Vinini Fm/Roberts Mtn. Thrust; a "dipping sector" that strikes NW, dips 70 …
PorterGeo Database
Descriptions of major ore deposits world wide. The Cripple Creek mining district, which is located approximately 120 km WSW of Denver in Colorado, USA, has produced over 650 tonnes (21 Moz) of gold since its discovery in 1891 (#Location: 38° 43' 37"N, 105° 8' 34"W). The orebodies that have yielded this gold have historically been narrow veins within both Precambrian and …
Occurrence, mineralogy and chemical composition of …
Table 1. Average microprobe analyses of gold grains from Tertiary Au deposits in Rhodope Massif. -=not analysed. bdl=below de-tection limit. n=number of analyses. es="early" stage. ls="late ...
Lovitt
comments. comment (production): huntting (1956) reported 240 tons in 1894, 170 tons in 1910, 20,000 tons 1938-1939, and 6,216 tons in 1944-46 comment (development): long hole drilling was accepted method for exploring extensions of known ore bodies in 1960's. ore is very fine-grained and early milling operations made poor recovery.
Cinnabar Group
Tertiary: Molybdenum Tertiary: Gold. Location. State: Arizona County: La Paz ... Gold Ore: Wulfenite Ore: Metacinnabar Gangue: Kaolin Gangue ... " looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Arizona. Read ...
Simplified map displaying the distribution of the …
Gold is mainly found in Cu-rich mineralisation in the form of small inclusions or veinlets within tetrahedrite-tennantite, enargite, louzonite and quartz. Gold grain size ranges from 3 to 500...
Mineralogy, geochemistry, and structural controls of a …
ore zone, features that are relevant to all exploration programmes targeting mesothermal gold-bearing vein and/or disseminated systems. 2. General geology ... Middle Tertiary gold mineralisation A swarm of mineralised zones formed during the development of the Moonlight Fault and associated fold zones in the middle Tertiary (Cooper et al., 1987 ...
Sanger Mine
"Where to Find Gold in Oregon" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold …
Gold and sulphide minerals in Tertiary quartz pebble …
Gold and sulphide minerals in Tertiary quartz pebble conglomerate gold placers, Southland, New Zealand ... D.M. Falconer et al. / Ore Geology Reviews 28 (2006) 525–545 527.