| 词条 | Mount Saddleback |
| 释义 |
| name = Mount Saddleback | photo = | elevation_m=593 | elevation_ref = [1] | prominence = | location = Peel region of Western Australia | range = Darling Range | coordinates = {{coord|32|58|S|116|27|E|type:mountain}} }} Mount Saddleback is the highest peak in the Darling Range of Western Australia. It is found at the eastern most part of the Darling Range[2] about {{cvt|20|km}} south of Boddington and {{cvt|40|km|abbr=on}} west of Williams. Bauxite is mined on the flanks of the peak and processed at Worsley Alumina which has been in operation since 1984.[3]The entire range is formed by the Darling Fault a {{cvt|1000|km|abbr=on}} fault that has been moving continually through its long history with the last major activity occurring 135 million years ago when Australia broke away from the super continent, Gondwana. The Darling Scarp formed around 570 million years ago and is composed of 3700 million-year-old rocks that are mostly granite.[2] Saddleback is found on the eastern side of the fault on the Darling Plateau.[4] The underlying bedrock is composed of medium grained granite and sometimes Archean aged granitoids.[4] The surface of the mount is an iron-rich hard cap with thickness a thickness of around {{cvt|6|m}} containing 40 to 50% Fe2O3 including significant amounts of quartz sand. Below this is an Aluminium oxide enriched interval with clay rich base, with an average depth of {{cvt|5.5|m|abbr=on}} and a maximum of up to {{cvt|20|m|abbr=on}}. Below this is a transition zone primarily made up of kaolin clays followed by weathered bedrock.[5] Above the bedrock the soils are composed of 25–30% bauxite with irregular and lenticular-shaped ore bodies. The largest ore body contains {{cvt|20|Mt}} over an area of {{cvt|600|ha}} with many smaller bodies. The total estimated reserve of bauxite in the mining area is {{cvt|400|Mt}}.[4] References1. ^{{cite web|url=https://www0.landgate.wa.gov.au/maps-and-imagery/wa-geographic-names/interesting-wa-facts|title=Interesting WA facts|work=Landgate|accessdate=27 November 2018|publisher=Government of Western Australia}} 2. ^1 {{cite web|url=http://www.followmyride.com.au/view/what-you-will-see/munda-biddi-the-geology|title=Geology along the Munda Biddi|accessdate=27 November 2018|publisher=Follow my ride}} 3. ^{{cite web|title=Worsley Alumina|url=http://www.south32.net/our-operations/australia/worsley-alumina|website=South32|publisher=South32|accessdate=27 November 2018}} 4. ^1 2 {{cite web|url=https://www.mindat.org/loc-20140.html|title=Saddleback Mine (Worsley), Boddington, Boddington Shire, Western Australia, Australia|accessdate=27 November 2018|publisher=Mindat.org}} 5. ^{{cite web|url=http://www.portergeo.com.au/database/mineinfo.asp?mineid=mn880|title=Darling Range Bauxite - Jarrahdale, Dwellingup, Huntley, Willowdale, Mt Saddleback Western Australia, WA, Australia|accessdate=27 November 2018|year=2004|publisher=Porter Geoconsultancy}} 3 : Mountains of Western Australia|Darling Range|Mining in Western Australia |
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