Tonogold Resources Inc (TNGL)

[ComstockRoyalty]

The #Carlin #Trend of Mexico is Sonora....

#tonogold #TNGL is operating in Sonora Mexico.

#Newmont #Mining Operates in #Sonora Mexico

http://www.theaureport.com/pub/na/sonora-state-mexico-s-carlin

Mexico is the world’s second largest silver producer, and ranks 11th in terms of global copper production. The country’s biggest gold mine, La Herradura in Sonora state is owned and operated as a joint venture between Newmont Mining (NYSE:NEM) and Mexican mining conglomerate Industrias Penoles.

The majority of gold production comes from mines where gold is obtained as a co-product (silver and copper-gold mines) and by-product (polymetallic deposits).

Sonora is rapidly becoming the Mexican Nevada, despite difficulties with labor, equipment, and security. Not unlike Nevada 100 years ago, or any frontier town going back further. And the similarity to Nevada doesn’t end there.

Increasingly, companies operating in Sonora are alluding to “Carlin” style mineralization, though typically the allusion to the famed Nevada gold trend is bandied around too often and too optimistically. These days, “Carlin” mineralization is a promoter’s way of trying to make ultra low grade mineralization sound like good news.

The story of Carlin Trend gold is fascinating, in that the fact that gold was ever discovered in the region is as unlikely as the huge tonnage that the district delivers today. Carlin style gold is sub-microscopic -- not visible to the naked eye. In the 1960s' Dr. Ralph Roberts, considered by many to be the father of the Carlin Trend, conceived of and propagated the concept of sub-microscopic gold deposits in north central Nevada. His ground-breaking research and field work were catalysts for the more than 75 million ounces of gold (USD $51 billion at today's prices) produced on the Carlin Trend to date and the more than 100 million (USD$675 million) in gold reserves still in the ground.

Many explorers in Mexico believe that the potential for the discovery of a true analogue to the Carlin Trend is inevitable.

The characteristics of Carlin-style mineralization are: 1) shallow systems where lower grade gold occurs as disseminations in carbonaceous, limey siltstones and altered limestone and is spread out over a cloud of mineralization at depths of 500-700 feet; and 2) deeper, higher-grade sulfide gold mineralization commonly occur at depths below 1,000 feet.

There hasn’t been very much exploration to below 1,000 feet in Sonora, but usually that depth of exploration is preceded by discoveries at substantially shallower depths that justify the expense of sub -1,000 foot drilling.

Although no really spectacular mines have yet been discovered, the increasing amounts of capital and effort being expended there certainly point to the likelihood of a mine capable of producing in excess of 10 million ounces at some point in the not too distant future.

Sonora is the most actively explored among Mexico’s 31 states. Currently there are 138 companies in Sonora working on a total of 151 registered properties, seeking everything from gold and silver to copper and uranium.

Sonora has a long history of mining reaching back to Spanish colonial times.

A New York Times article dated April 14, 1882 describes a typical day in the Cochise Mining Camp in Sonora, where even then, prospectors were looking for overlooked deposits from previous Spanish miners.

According to the article, “On the hills about were the old openings, some deep and some shallow, the old dump piles at the mouths of the inclines containing ores which by our improved methods of working would pay.”

It goes on to reference a visit to the Cochise mine, “which shows a six-foot vein of good ore, two feet of which averages $1,200 to the ton, galena and silver, and some gold.”

There are q number of producing mines in Sonora, among them:


#IronOre #Mining