Central Rand Gold's (LON:CRND) shares fell after it reported that output in the first four months of the year was slightly below target.

Central Rand Gold said mining operations progressed well in the period but total production of 83,597 tonnes was slightly below the 83,604 tonnes target.

The overall mined grade was, at 3.25g/t, slightly lower than in 2012 where 3.92g/t was achieved.

Central Rand Gold says the drop in grade is not seen as permanent and the grade will continue to fluctuate depending on the specific mining area.

It adds: "This is not unusual in mining operations and the company remains confident that the overall resource grade of 3.57g/t is achievable over the life of the mine."

Central Rand Gold said that further development during the first quarter of the year had opened up additional mining fronts, providing the company with greater mining optionality and flexibility.

DiamondCorp (LON:DCP) is seeking shareholder approval for a share capital reorganisation.

The company says its ordinary shares are currently trading at price close to their nominal value of 3p.

But if the price fell below 3p, it would be prevented from carrying out any future fundraisings as it could not issue shares below their nominal value.

The board is proposing that each existing ordinary share should be sub-divided into one new ordinary share of 0.1p and one deferred ordinary share of 2.90p.

The new ordinary shares will continue to carry the same rights and benefits as the existing ordinary shares.

The proposal will be put to shareholders at the annual general meeting on 2 July.

BHP Billiton (LON:BLT) has completed the sale of its 8.33% interest in the East Browse joint venture and 20% interest in the West Browse joint venture, offshore Western Australia, to PetroChina International Investment (Australia) for US$1.63bn.

Anglesey Mining's (LON:AYM) 15%-owned associate, Labrador Iron Mines Holdings (LIM), has made its first shipment of iron ore this year.

Last month LIM signed a new two-year iron ore sales agreement with the Iron Ore Company of Canada for the sale of all of its iron ore production until the end of 2014.

The sector's biggest fallers were Minco (LON:MIO) and Vane Minerals (LON:VML) - down by more than 13% and 12% respectively. The biggest riser was African Eagle Resources (LON:AFE) - up by over 41%.

At 4:25pm:

(LON:AMI) American Investment Trust share price was +4.38p at 227.88p

(LON:AQP) Aquarius Platinum share price was +0.38p at 43.38p

(LON:AYM) Anglesey Mining share price was +0.25p at 7.5p

(LON:BEM) share price was +0.01p at 8.13p

(LON:BKY) share price was 0p at 16.5p

(LON:BLT) BHP Billiton share price was +9.5p at 1830.5p

(LON:CEY) Centamin Egypt Ld share price was +0.51p at 38.55p

(LON:CHL) share price was -0.5p at 22p

(LON:CRND) share price was +0.01p at 0.33p

(LON:CZA) share price was -0.25p at 10.88p

(LON:DCP) share price was -0.25p at 3.63p

(LON:FDI) Firestone Diamonds share price was +0.01p at 3.13p

(LON:FRES) share price was +27.5p at 1142.5p

(LON:GEMD) share price was +2.13p at 128.13p

(LON:HOC) share price was +3.5p at 230p

(LON:KMR) Kenmare Resources share price was +0.11p at 30.48p

(LON:MIO) Minco share price was -0.38p at 2.5p

(LON:VED) Vedanta Resources share price was +11p at 1241p