Potash Supply Stocks

Cloth-dying and soap-making have employed residue from boiled plant material since ancient times. The plants are reduced to brine and that evaporated until only the useful “potash” remains. In the 19th century the active ingredient in this precipitate was fit into the periodic table as “potassium” with the symbol “K”. Potash has stuck for potassium bearing salts mined in modern times. The salts are processed into fertilizer, now 95% of the K market, which returns potassium to the plant world to increase agricultural yields. Potassium is irreplaceable in this application, so growth of its supply is considered critical to expand global food output. Potash salts are extracted in about a dozen areas, but only a few have large scale. As with other bulk minerals, the boom in potash exploration is keyed to both greater supply diversity and more capacity.

The most important potash basin in Saskatchewan supplies about 1/3 of the market and contains half of the current reserves. Potash Corp of Saskatchewan (POT-T, N) is the region’s and world’s biggest potash miner, with Mosaic Co (MOS-N) and Agrium Inc (AGU-T, N) making up the balance. All of these producers market through a single agency. BHP Billiton (BHP-LSE, N.ADR) indicates it will move ahead on its Janson Lake deposit, acquired by take-over of Anglo Potash in 2008, despite a rebuff of a bid to takeover POT last year; Germany’s K+S KALI is also active there (see below); and a number of other Canadian juniors own projects in the basin. These thick, rich 400 million year old deposits lie below 1000 metres (3000 ft) of cover. Most are mined from high-capital underground operations, though several use wells to circulate solutions that absorb salts.

The second largest active basin is Upper Kama in western Russia whose largest producers, Silvinit (SLV-RTS) and Uralkali (URKA-RTS), are attempting a merger. Fertilizer giant PhosAgro has also expressed an interest in Silvinit. PhosAgro had gained Russian government approval to counter the bid by BHP for POT last year before Canadian governments nixed a take-over. The next most important potash source is the Starobin basin in Belarus being mined by a state owned firm. Russia and Belarus have joint marketing arrangements and together represent another 1/3 of potash output.

Other significant producers include: K+S KALI GmbH (K+S Group; SDF-XETRA) operating a series of German mines and which recently took over Canadian junior Potash One; Intrepid Potash (IPI-N) mining in Utah and New Mexico; Vale SA (VALE3-BOVESPA, VALE-N.ADR) from expanding mines in Brazil; ICL Fertilizers (ICL-Tel Aviv)from mines in the UK and Spain as well as solar evaporate operations in Israel; and Arab Potash (APOT-Amman) with solar evaporate operations in Jordan. These are significant producers with some room for expansion, but none approaches the scale potential of Saskatchewan or Russia/Belarus.

The Israel and Jordon operations extract potassium from Dead Sea brine. The Dead Sea is a present-day equivalent of the now dry Danakil Depression seabed on the Ethiopia-Eretria border where potash deposits were laid down less than two million years ago. Danakil is generating a lot of interest. Shallow potash deposits have been located along 10s of km of the 200 km (120 mile) long Depression, suggesting potential for both low entry costs and significant scale.

In Ethiopia the Indian miner Sainik Coal Mining is considering a move forward with a $1 billion potash development, and BHP Billiton is at an earlier stage of assessing holdings. Smaller companies with established resources include Toronto based juniors Alanna Potash (AAA-TSX.V) and recently listed Ethiopian Potash (FED.TSX.V), both testing deposits first discovered in the 1960s. Chinese funding has begun an upgrade and expansion of Ethiopia’s rail system that could move product to port facilities in Djibouti. On the Eritrean side of the boarder Australian explorer South Boulder Mines (STB-ASX) is in the early stages of outlining a resource, Vancouver’s NGEx Resources (NGQ-TSX.V) from the Lundin group added potash ground to other in-country holdings, and others are showing interest. The basin is close to Eritrean port facilities on the Red Sea. Danakil means “salt lake” and it has supplied the common salt trade for millennia. It may now become important to diversifying the modern potassium salts market.

Potash Deposits and Products

Salts form as evaporation of trapped water increases its brine density. The first of the “evaporites” to drop out are halite (NaCl), the table or common salt used in spicing and preserving food, and gypsum used in construction. To generate potash salts a higher density brine is required. Small deposits are found in a number of regions, but only a few basins have had the right conditions to both form and preserve large potash deposits.

Sylvite, KCl, is the purest potash salt with a 52.5% K content. This is one of the last salts to precipitate out of brine, so it is relatively scarce. Potassium in fertilizer is usually expressed as potassium-oxide, K2O, which is 82% K by weight; sylvite equates to 63.2% K2O. The high sylvite layer in an evaporite sequence, if it exists, is usually a mix of sylvite and halite. The more common carnallite has a K content of 14%, or 17% K2O, but carnallite ore can contain other salts that upgrade its potassium content.

The most common potash product is “muirate of potash”, or MOP (muria is Latin for brine,) which is potassium-chloride and therefore chemically equivalent to sylvite. This is usually what a producer output will reference. Another typical product is potassium-sulfate, K2SO4, or SOP that contains about 52% K2O but gains value as a sulfur source. Salts such as kainite containing sulfur and can be preferentially upgraded to SOP.

The USGS estimate of a global 2010 mine output at about 33 million tons (30 MM tonnes) is K2O equivalent. Most general comments on pricing will be based on this higher grade form used to denote fertilizer content. Potash pricing went from a stable US $150-200/tonne prior to 2007 to over $800/t in 2008 as the biofuel craze gripped markets. Post Credit Crunch pricing slumped to $300 but has recovered to near $400.

Fertilizer pricing is dependent on product form plus the content of other nutrients that may go into various retail sales products. Potash deposits are valued on potassium content net of the costs to get that on to a loading dock in a useable form. In comparing deposits or districts it’s important to note whether reporting uses K2O or KCl equivalent, or some other local notation. As with most bulk mineral commodities valuation is based on contract pricing which can be tracked through news from marketing agencies Canpotex and Belarussian Potash Co who account for over 60% of sales. Spot pricing, which is an important gauge of market sentiment, tends to trade in line with grain prices. Flooding in Australia and low precipitation in China’s grain belt have been underpinning recent gains for both grains and potash.

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