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mother lode

1. In mining, the main source of a mineral in a given area. We haven't hit the mother lode of silver quite yet—but we will!
2. By extension, an abundance of something. I wasn't looking to expand my record collection, but I sure hit the mother lode when I cleaned out my parents' attic! It's an exciting time to be a researcher in this field, as a mother lode of new data was recently released.
See also: lode, mother
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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References in periodicals archive ?
"We are very pleased to announce this maiden resource of 21,200 tonnes of contained copper, which at current metal prices of some AUD9,840 per tonne implies substantial value to our Company," said Howard Renshaw, MD of QMC "we will now run a vigorous programme to upgrade the quality of this resource estimate and to follow-up on the three copper lodes which are still open along strike and at depth.
On completion of northern lode drilling, dependent upon final assay results for all holes, it is expected this zone of mineralisation will form the basis for the first incremental increase of the Sihayo JORC compliant resource estimate.
The new drilling supports the re-interpretation of historical drill data and has identified a high-grade southerly plunging shoot on the main lode that remains open at depth below the current JORC resource.
"Our facility is really unique from the standpoint that it combines a wellness fitness center with performance training," Lodes said.
The discursive quality of Lodes's argumentation is in itself attractive; and although the absence of an index makes it difficult for the conscientious reader to retrieve an idea encountered while reading, the elaborate numbering of chapters and subsections provides a useful orientation to the contents as a whole.
Steep lodes occur in ductile shear zones that are NNW-trending and sub-vertical, and have gently south-plunging intersections with the quartz dolerite.
J1 lode - Matilda shoot has received the most drill attention, largely due to the concentration of drill holes in the central part of the system that followed the initial discovery before drilling stepped out along strike.
In addition, a continuous hanging wall lode has also been identified which is expected to have a positive impact on mining economics.
The Lena deposit has an existing JORC 2012 resource of 2,682kT @ 1.77g/t Au for 153koz Au which is only estimated to a maximum vertical depth of 160m at Lena Main lode.
The recent 3,000m RC drill programme that concentrated on the M1 and M4 lodes was successful in increasing the size and confidence of the resource in this area.
Thus when the sulphides are remobilised, the lodes also appear to have a northerly plunge.
In addition, this drilling provides encouragement and assistance with targeting the deeper lodes which remain open at depth.
Perth, Australia, May 21, 2012 - (ABN Newswire) - Australian gold-copper resources company, Mutiny Gold Ltd (ASX:MYG), is pleased to announce new high-grade gold intersections from both the West and Central Lodes of its Deflector Gold Deposit in Western Australia (refer Figure 1).
Your Board is confident that the planned upcoming drilling program will discover further significant gold lodes and looks forward to continuously reporting these exciting discoveries to you.