Ministry of Energy, Mines and Natural Gas and Responsible for Housing
News | The Premier Online | Ministries & Organizations | Job Opportunities | Main Index

MINFILE Home page   ARIS Home page MINFILE Search page   Property File Search
HelpHelp
New Window
File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  30-Oct-14 by Laura deGroot(LDG)

Summary HelpHelp

NMI
Name LORD ROBERTS, BADDEN POWELL, SIR DOUGLAS HAIG, ROY Mining Division Trail Creek
BCGS Map 082F022
Status Prospect NTS Map 082F04W
Latitude 49º 12' 20" N UTM 11 (NAD 83)
Longitude 117º 46' 44" W Northing 5450599
Easting 443265
Commodities Magnetite, Iron, Copper, Silver, Bismuth Deposit Types K03 : Fe skarn
K01 : Cu skarn
Tectonic Belt Omineca Terrane Quesnel
Capsule Geology

On the Lord Roberts prospect a number of shallow open cuts have exposed a body of magnetite which varies in grade and apparently follows the somewhat irregular contact between rocks of the Middle to Late Jurassic Nelson Intrusions and sediments of the Pennsylvanian to Permian Mount Roberts Formation. The Mount Roberts Formation rocks consist of interbedded siltstone, quartzite, greywacke, slate, pebble conglomerate and limestone. They are intruded by a stock comprised of granodiorite to quartz diorite.

The massive blue-grey magnetite (occurring on the Lord Roberts claim) ranges up to about 10 metres in width and hosts disseminated pyrite, pyrrhotite and chalcopyrite. In 1920, a sample of the best grade of magnetite assayed: iron, 54 per cent; phosphorus, nil; and sulphur, 2.69 per cent (Minister of Mines Annual Report 1920, page 137). A sample of the magnetite with disseminated chalcopyrite and pyrrhotite was assayed for copper, and gave negative results. Hornblende, epidote, garnet, feldspar and quartz were detected in the bluish magnetite. Magnetite and pyrite are abundant near the footwall and pyrrhotite and chalcopyrite near the hanging wall. In the lowest shaft, exposed magnetite hosts pyrrhotite, pyrite, bismuthinite(?) and chalcopyrite in a quartz-hornblende-feldspar gangue.

In 1924, 7 tonnes of ore were shipped which produced 187 grams of silver and 22 kilograms of copper.

Bibliography
EMPR AR *1920-137; 1927-327
EMPR ASS RPT 19367
EMPR BC METAL MM00680
EMPR BULL 74; 109
EMPR FIELDWORK 1987, pp. 19-30; 1988, pp. 33-43; 1989, pp. 11-27;
1990, pp. 9-31
EMPR OF 1988-1; 1989-11; 1990-8; 1990-9; 1991-2; 1991-16
EMPR PF (Prospectors Report 1994-57 by Horst Klassen)
GSC MAP 1518; 1091A; *1504A
GSC MEM 77, pp. 158,159; 308, pp. 176-178
GSC OF 1195
GSC P 79-26
GSC SUM RPT *1906, p. 62

COPYRIGHT | DISCLAIMER | PRIVACY | ACCESSIBILITY