![]() When you place an order for a Discovery Pass on our website our acceptance of your order will take place when we email you to accept it, at which point a contract will come into existence between you and us. Please ensure that you are willing to be bound by these regulations before purchasing your Discovery Pass. Purchase and use of a Discovery Pass is in accordance with the regulations of each individual Attraction (as defined below in Term 1), copies of which are available at each Attraction or can be obtained online at. These Terms are integral to each Discovery Pass and are independent of any other contract and cannot be varied (other than in accordance with Term 21). ![]() If we have to contact you, we will do so using the contact details you provide when you purchase a Discovery Pass. You can contact us by writing to us at or Merlin Annual Pass Team, Chessington World of Adventures Resort, Leatherhead Road, Chessington, Surrey, KT9 2NE. We are Merlin Attractions Operations Limited, a company registered in England and Wales, with company number 06272935 and our registered office address is at Link House, 25 West Street, Poole, Dorset BH15 1LD ("Merlin" or "we"). These Terms tell you who we are, how we will provide the Discovery Pass to you, what to do if there is a problem and other important information. Please read these Terms carefully before you submit your order for any Discovery Pass to us. These are the terms and conditions ("Terms") on which we supply Merlin Discovery Passes ("Discovery Pass") to you ("Passholder" or "you"). In all cases the open pit mining will be extending the depth of existing open pits, except for the Bedevere pipe, which has not been mined previously.ĭesign parameters assumed for the open pits included batter face angles of 75 degrees, batter height of 20m, berm width of 10m, double ramp widths of 18m. No dilution factor has been applied as the resource grades are based predominantly on historical recovered grades. With a selective mining unit of 5m x 5m x 5m, a 2.5% ore loss factor was applied to the resource model. The use of 120t class excavators and 40t articulated dump trucks (“ADT’s”), mining 2.5m high flitches has been assumed. In the weathered zone, kimberlite will be free dig. Drill and blast will be employed for all waste rock and for kimberlite below the weathered zone. The Scoping Study has assumed conventional load and haul operations by a mining contractor for the open pit mining of each pipe. There is potential for viable underground mining beneath the VPM on certain pipes, however this has not been included in this Scoping Study and is the subject of a separate scoping study currently underway. When the open pit has been completed to the planned depth, vertical pit mining (“VPM”) will be used to deepen the mine below the base of the open pit. ![]() Initially each deposit will be mined by conventional open pit mining. Two different but complementary mining methods for the Merlin kimberlite pipes have been planned. The pipes are located within four main clusters over an area of. The sagged nature of the infill sediments, the upturned edges with associated slickensides, the presence of a basal non-kimberlitic conglomerate and the thickened iron pisolite profiles, all suggest that the Cretaceous aged sediments have subsided into the pipe structures possibly due to solution weathering of the kimberlite. The kimberlites are strongly weathered to 60m - 80m depth from surface and appear to have sunk back down into the craters, that have been in-filled with Cretaceous sediments that are up to 40m thick. In the case of Palomides and Sacramore they coalesce into a larger single vent named PalSac. In the softer sediments beneath the Bukalara/ Proterozoic unconformity, some pipes increase in diameter. ![]() At surface the shapes of the pipes are circular to elliptical and maintain their regular shape and near vertical sides within the Bukalara sandstone. ![]() The Merlin pipes are small, with the diameter of the upper levels varying between 50m–125m. Thin deposits of Cretaceous sediments and laterite overlie the pipes. The Merlin kimberlites are Devonian in age (382 million to 352 million years ago) and intrude mid-Proterozoic shales and dolomites of the McArthur Group and the unconformably overlying Cambrian Bukalara Sandstone. The Merlin kimberlite field is situated on the eastern side of the North Australian Craton, ~100km south-west of the coast of the Gulf of Carpentaria. ![]()
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