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Widgiemoolthalite
Widgiemoolthalite is a rare mineral hydration, hydrated nickel(II) carbonate mineral with the chemical formula . Usually bluish-green in color, it is a brittle mineral formed during the weathering of nickel sulfide. Present on gaspéite surfaces, widgiemoolthalite has a Mohs scale of mineral hardness, Mohs scale hardness of 3.5 and an unknown though likely disordered crystal structure. Widgiemoolthalite was first discovered in 1992 in Widgiemooltha, Western Australia, which is to date its only known source. It was named the following year by the three researchers who first reported its existence, Ernest Henry Nickel, Ernest H. Nickel, Bruce W. Robinson, and William G. Mumme. Origins One consequence of the 1966 discovery of nickel deposits in Western Australia and subsequent nickel mining boom was the discovery of novel secondary mineral species in mined regions beginning in the mid-1970s. Widgiemoolthalite was first found at Widgiemooltha Komatiite#132 North, 132 North, a nickel d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Locality (geology)
Type locality, also called type area, is the locality where a particular rock type, stratigraphic unit or mineral species is first identified. If the stratigraphic unit in a locality is layered, it is called a stratotype, whereas the standard of reference for unlayered rocks is the type locality. The concept is similar to type site in archaeology. Examples of geological type localities Rocks and minerals * Aragonite: Molina de Aragón, Guadalajara, Spain * Autunite: Autun, France * Benmoreite: Ben More (Mull), Scotland * Blairmorite: Blairmore, Alberta, Canada * Boninite: Bonin Islands, Japan * Comendite: Comende, San Pietro Island, Sardinia * Cummingtonite: Cummington, Massachusetts * Dunite: Dun Mountain, New Zealand * Essexite: Essex County, Massachusetts, US * Fayalite: Horta, Fayal Island, Azores, Portugal * Harzburgite: Bad Harzburg, Germany * Icelandite: Thingmuli (Þingmúli), Iceland * Ijolite: Iivaara, Kuusamo, Finland * Kimberlite: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Mineral Symbols
Mineral symbols (text abbreviations) are used to abbreviate mineral groups, subgroups, and species, just as lettered symbols are used for the chemical elements. The first set of commonly used mineral symbols was published in 1983 and covered the common rock-forming minerals using 192 two- or three-lettered symbols. These types of symbols are referred to as Kretz symbols. More extensive lists were subsequently made available in the form of publications or posted on journal webpages. A comprehensive list of more than 5,700 International Mineralogical Association, IMA-CNMNC approved symbols (referred to as International Mineralogical Association, IMA symbols) compiled by L.N. Warr was published in volume 85 (issue 3) of th''Mineralogical Magazine''(2021). These symbols are listed alphabetically in the tables below. The approved listings are compatible with the system used to symbolize the elements, 30 of which occur as minerals. Mineral symbols are most commonly represented by thre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Widgiemooltha Komatiite
The Widgiemooltha Komatiite is a formation of komatiite in the Yilgarn craton of Western Australia. Stratigraphy The stratigraphy of the Widgiemooltha Komatiite is well known to be part of the regional komatiite magmatic event also seen at the Kambalda Dome, to the north. There are comparisons which place the Widgiemooltha Komatiite as equivalent to the Silver Lake Komatiite. The Mt Edwards Basalt is correlated regionally with the Devon Consuls Basalt of Kambalda, and the Widgeimooltha Chert correlated with the Paringa Slate. The structure of the Widgiemooltha Dome has three thrusted repetitions of the basal komatiite contact and komatiite sequence including footwall Mt Edwards Basalt and hangingwall sediments (Widgiemooltha Chert). Widgiemooltha Dome The Widgiemooltha Komatiite is exposed around the margins of a large, granite dome. The Widgiemooltha Granite is a coarse to medium, holocrystalline equigranular granite with subordinate biotite and ferromagnesian minerals. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaspéite
Gaspéite, a very rare nickel carbonate mineral, with the formula , is named for the place it was first described, in the Gaspé Peninsula, Québec, Canada. Gaspéite is the nickel rich member of the calcite group. A solid solution series exists between all members of this group with divalent cations readily exchanged within the common crystal structure. It forms massive to reniform papillary aggregates in fractures, botryoidal concretions in laterite or fracture infill. It is also present as stains and patinas on iron oxide boxworks of gossaniferous material. Paragenesis Gaspéite is formed in the regolith as a supergene enrichment mineral of hypogene nickel sulfide minerals, generally in arid or semi-arid environments which produce conditions amenable to concentration of calcareous or carbonate minerals in the weathering profile. Gaspéite from Widgiemooltha is associated with talc carbonated komatiite-associated nickel sulfide gossans and is probably formed by substitut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Mineralogist
''American Mineralogist: An International Journal of Earth and Planetary Materials'' is a peer-reviewed scientific journal covering the general fields of mineralogy, crystallography, geochemistry, and petrology. It is an official journal of the Mineralogical Society of America, publishing both subscription and open access articles. The journal is a hybrid open-access journal. The editors-in-chief are Hongwu Xu (Los Alamos National Laboratory), and Don Baker (McGill University). History The journal was established in 1916, with the first issue appearing in July of that year, under the auspices of the ''Philadelphia Mineralogical Society'', the ''New York Mineralogical Club'', and the ''Mineral Collectors' Association''. On December 30, 1919, the Mineralogical Society of America was formed and ''American Mineralogist'' became the society's journal. Abstracting and indexing The ''American Mineralogist'' is abstracted and indexed in Chemical Abstracts, the Science Citation Index, Ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kambaldaite
Kambaldaite, NaNi4(CO3)3(OH)3·3H2O, is an extremely rare hydrated sodium nickel carbonate mineral described from gossaniferous material associated with Kambalda type komatiitic nickel ore deposits at Kambalda, Western Australia, and Widgie Townsite nickel gossan, Widgiemooltha, Western Australia. Kambaldaite crystallizes in the hexagonal system, is light green to blue, and forms drusy to mammilla encrustations on the matrix. Kambaldaite was first described in 1985 from the gossan of the Otter Shoot nickel orebody, Kambalda, during mining of the gossans material. Kambaldaite, though in lesser and rarer amount, is also found in the Widgiemooltha nickel gossans, probably discovered there in the early to mid-1990s. Paragenesis Kambaldaite is formed in the regolith as a supergene alteration mineral of nickel sulfide minerals, in arid or semi-arid environments which produce conditions amenable to a concentration of calcareous or carbonate minerals in the weathering profile. K ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolomite (mineral)
Dolomite () is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally The term is also used for a sedimentary carbonate rock composed mostly of the mineral dolomite (see Dolomite (rock)). An alternative name sometimes used for the dolomitic rock type is dolostone. History As stated by Nicolas-Théodore de Saussure the mineral dolomite was probably first described by Carl Linnaeus in 1768. In 1791, it was described as a rock by the French natural history, naturalist and geologist Déodat Gratet de Dolomieu (1750–1801), first in buildings of the old city of Rome, and later as samples collected in the County_of_Tyrol, Tyrolean Alps. Nicolas-Théodore de Saussure first named the mineral (after Dolomieu) in March 1792. Properties The mineral dolomite crystallizes in the trigonal, trigonal-rhombohedral system. It forms white, tan, gray, or pink crystals. Dolomite is a double carbonate, having an alternating structural arrangement of calcium and magnesium ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annabergite
Annabergite is an arsenate mineral consisting of a hydrous nickel arsenate. It is considered a member of the vivianite group and known for its ability to form crystals in a characteristic apple-green color. History Annabergite has been known since the 18th century, although type localities were not published along initial descriptions. The first report of Annabergite by Axel Fredrik Cronstedt from 1758 erroneously identifies it as a nickel oxide mineral and assigned it the latinized name ''Ochra niccoli'', while Wallerius gave it the name ''nickel bloom'' in 1778. Annabergite was thoroughly described in 1852 by Brooke and Miller from specimens found in Annaberg in Saxony, which was proposed as namesake for the mineral. Properties Annabergite crystallizes in the monoclinic system and is isomorphous with vivianite and erythrite. It most commonly occurs as microcristalline coatings, soft earthy masses and encrustations. Well developed crystals are relatively rare ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crystal Habit
In mineralogy, crystal habit is the characteristic external shape of an individual crystal or aggregate of crystals. The habit of a crystal is dependent on its crystallographic form and growth conditions, which generally creates irregularities due to limited space in the Crystallization, crystallizing medium (commonly in Rock (geology), rocks).Klein, Cornelis, 2007, ''Minerals and Rocks: Exercises in Crystal and Mineral Chemistry, Crystallography, X-ray Powder Diffraction, Mineral and Rock Identification, and Ore Mineralogy,'' Wiley, third edition, Wenk, Hans-Rudolph and Andrei Bulakh, 2004, ''Minerals: Their Constitution and Origin,'' Cambridge, first edition, Crystal forms Recognizing the habit can aid in mineral identification and description, as the crystal habit is an external representation of the Crystal structure, internal ordered atomic arrangement. Most natural crystals, however, do not display ideal habits and are commonly malformed. Hence, it is also important to des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
