Arid
DOI10.1111/maps.12605
Characterization of Mason Gully (H5): The second recovered fall from the Desert Fireball Network
Dyl, Kathryn A.1,2; Benedix, Gretchen K.1,3; Bland, Phil A.1,3; Friedrich, Jon M.4,5; Spurny, Pavel6; Towner, Martin C.1; O’Keefe, Mary Claire4; Howard, Kieren5,7; Greenwood, Richard8; Macke, Robert J.9,10; Britt, Daniel T.11; Halfpenny, Angela2; Thostenson, James O.12,13; Rudolph, Rebecca A.12,14; Rivers, Mark L.15; Bevan, Alex W. R.3,16
通讯作者Dyl, Kathryn A.
来源期刊METEORITICS & PLANETARY SCIENCE
ISSN1086-9379
EISSN1945-5100
出版年2016
卷号51期号:3页码:596-613
英文摘要

Mason Gully, the second meteorite recovered using the Desert Fireball Network (DFN), is characterized using petrography, mineralogy, oxygen isotopes, bulk chemistry, and physical properties. Geochemical data are consistent with its classification as an H5 ordinary chondrite. Several properties distinguish it from most other H chondrites. Its 10.7% porosity is predominantly macroscopic, present as intergranular void spaces rather than microscopic cracks. Modal mineralogy (determined via PS-XRD, element mapping via energy dispersive spectroscopy [EDS], and X-ray tomography [for sulfide, metal, and porosity volume fractions]) consistently gives an unusually low olivine/orthopyroxene ratio (0.67-0.76 for Mason Gully versus similar to 1.3 for typical H5 ordinary chondrites). Widespread silicate darkening is observed. In addition, it contains a bright green crystalline object at the surface of the recovered stone (diameter approximate to 1.5mm), which has a tridymite core with minor -quartz and a rim of both low- and high-Ca pyroxene. The mineralogy allows the calculation of the temperatures and integral(O-2) characterizing thermal metamorphism on the parent body using both the two-pyroxene and the olivine-chromite geo-oxybarometers. These indicate that MG experienced a peak metamorphic temperature of similar to 900 degrees C and had a similar integral(O-2) to Kernouve (H6) that was buffered by the reaction between olivine, metal, and pyroxene. There is no evidence for shock, consistent with the observed porosity structure. Thus, while Mason Gully has some unique properties, its geochemistry indicates a similar thermal evolution to other H chondrites. The presence of tridymite, while rare, is seen in other OCs and likely exogenous; however, the green object itself may result from metamorphism.


类型Article
语种英语
国家Australia ; USA ; Czech Republic ; England ; Vatican
收录类别SCI-E
WOS记录号WOS:000372556800009
WOS关键词EQUILIBRATED ORDINARY CHONDRITES ; THERMAL HISTORIES ; PARENT BODY ; SHOCK ; METAMORPHISM ; CONSTRAINTS ; MODEL ; METEORITES ; ACCRETION ; KERNOUVE
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
来源机构Commonwealth Scientific and Industrial Research Organisation
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/195040
作者单位1.Curtin Univ, Dept Appl Geol, GPO Box U1987, Perth, WA 6845, Australia;
2.CSIRO Earth Sci & Resource Engn, 26 Dick Perry Ave, Kensington, WA 6151, Australia;
3.Western Australian Museum, Dept Earth & Planetary Sci, Locked Bag 49, Welshpool Dc, WA 6986, Australia;
4.Fordham Univ, Dept Chem, Bronx, NY 10458 USA;
5.Amer Museum Nat Hist, Dept Earth & Planetary Sci, New York, NY 10024 USA;
6.Acad Sci, Astron Inst, Fricova 298, CZ-25165 Ondrejov, Czech Republic;
7.CUNY, Kingsborough Community Coll, 2001 Oriental Blvd, Brooklyn, NY 11235 USA;
8.Open Univ, Planetary & Space Sci, Walton Hall, Milton Keynes MK7 6AA, Bucks, England;
9.Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA;
10.Vatican Observ, V-00120 Vatican City, Vatican;
11.Univ Cent Florida, Dept Phys, Orlando, FL USA;
12.Amer Museum Nat Hist, Microscopy & Imaging Facil, New York, NY 10024 USA;
13.Duke Univ, Shared Mat Instrumentat Facil, Box 90271, Durham, NC 27708 USA;
14.GE Inspect Technol, 50 Ind Pk Rd, Lewistown, PA 17044 USA;
15.Univ Chicago, Consortium Adv Radiat Sources, Argonne, IL 60439 USA;
16.Curtin Univ, Dept Imaging & Appl Phys, Kent St, Bentley, WA 6102, Australia
推荐引用方式
GB/T 7714
Dyl, Kathryn A.,Benedix, Gretchen K.,Bland, Phil A.,et al. Characterization of Mason Gully (H5): The second recovered fall from the Desert Fireball Network[J]. Commonwealth Scientific and Industrial Research Organisation,2016,51(3):596-613.
APA Dyl, Kathryn A..,Benedix, Gretchen K..,Bland, Phil A..,Friedrich, Jon M..,Spurny, Pavel.,...&Bevan, Alex W. R..(2016).Characterization of Mason Gully (H5): The second recovered fall from the Desert Fireball Network.METEORITICS & PLANETARY SCIENCE,51(3),596-613.
MLA Dyl, Kathryn A.,et al."Characterization of Mason Gully (H5): The second recovered fall from the Desert Fireball Network".METEORITICS & PLANETARY SCIENCE 51.3(2016):596-613.
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