|
Lisakovo |
|
|
Kazakhstan |
| Main commodities:
Fe
|
|
 |
|
|
 |
Super Porphyry Cu and Au
|
IOCG Deposits - 70 papers
|
All available as eBOOKS
Remaining HARD COPIES on
sale. No hard copy book more than AUD $44.00 (incl. GST) |
|
|
The Lisakovo oolitic iron deposit is in northern Kazakhstan, around 100 km to the south-east of the main deposits of the Turgay iron ore province (see the Kachar and Sokolovsk records).
Unlike the skarn deposits of that province however, Lisakovo is composed of oolitic iron ores within a middle Oligocene river valley. The mineralisation extends over a length of more than 100 km and has a width varying between 2 to 3 km, up to 7 to 8 km (Smirnov, 1977).
The ore bearing sediments rest on the eroded surface of late Eocene to early Oligocene marine clays, and are overlain after a break by continental sandy and argillaceous sediments of the latest middle and late Oligocene. The oolitic iron ores are hosted by middle Oligocene gravel-pebble and sandy sediments. The country rocks and oolites are cemented by iron hydroxides, siderite, ferruginous chlorite and calcite. In the lower and middle sections the ore contains plant remains. The ore bearing sequence is 25 to 35 m thick. The oolitic iron ores fill the river channels, form numerous lens like and layer like bodies tens of kilometres in length and with widths of up to several hundred metres, sometimes merging into bands up to 1 to 2 km wide. They also occur as broader lacustrine and oxbow basins (Smirnov, 1977).
The ore occurs as both hydrogoethite and hydrogoethite-siderite-leptochlorite types. The former mainly occurs in river channels as oolitic sands, oolitic sandstones and pebble gravel sediments with hydrogoethite oolites. The latter is found as lacustrine and oxbow sediments, below protective clay layers. They are present as hydrogoethite oolites cemented by a leptochloritic and sideritic groundmass. The individual oolites are 0.05 to 0.6 mm, the commonest being 0.3 to 0.6 mm.
The higher grade orescontain 34 to 42.5% Fe, 0.45 to 0.55% P, 0.02 to 0.05% S. The S is in gypsum and P in stilpnosiderite within the iron hydroxides (Smirnov, 1977).
The reserve quoted by Smirnov (1977) was 1700 Mt @ 35.2% Fe.
The most recent source geological information used to prepare this decription was dated: 1977.
This description is a summary from published sources, the chief of which are listed below.
© Copyright Porter GeoConsultancy Pty Ltd. Unauthorised copying, reproduction, storage or dissemination prohibited.
|
|
|
Porter GeoConsultancy Pty Ltd (PorterGeo) provides access to this database at no charge. It is largely based on scientific papers and reports in the public domain, and was current when the sources consulted were published. While PorterGeo endeavour to ensure the information was accurate at the time of compilation and subsequent updating, PorterGeo, its employees and servants: i). do not warrant, or make any representation regarding the use, or results of the use of the information contained herein as to its correctness, accuracy, currency, or otherwise; and ii). expressly disclaim all liability or responsibility to any person using the information or conclusions contained herein.
|
Top | Search Again | PGC Home | Terms & Conditions
|
|
