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Mock, Dominik; Neave, David Axford; Müller, Samuel; Garbe-Schönberg, Dieter; Namur, Olivier; Ildefonse, Benoit; Koepke, Jürgen (2020): Trace element compositions in clinopyroxene and plagioclase, and crystallization temperature estimated after Sun and Liang (2017) for Wadi Somerah, Oman [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.914260

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Published: 2020-03-31 • DOI registered: 2020-12-25

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Abstract:
As largest and best-exposed paleo-fast-spread oceanic crust on land, the Samail ophiolite in the Sultanate of Oman represents an ideal natural laboratory for investigating processes at fast-spreading mid-ocean ridges. We studied a layered gabbro sequence from the middle of the plutonic crust showing dm-scale modal layering with olivine abundance gradually decreasing from layer base to top (Wadi Somerah, Sumail block). Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was performed in order to obtain trace element contents and rare earth elements (REE) in particular. Analyses were performed at the Institut für Geowissenschaften (Christian-Albrechts-Universität zu Kiel, Germany) using a 193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to an Agilent 7900s ICP-MS. Analyses were performed as point measurements with 16 Hz pulse rate, 18 Jcm-2 fluence and a crater diameter of 120 µm on plagioclase, and 10 Hz, 12 Jcm-2 and a crater diameter of 32 µm on clinopyroxene. Differences in core and rim compositions of clinopyroxene reveal significant zonation with higher REE contents in the rim. Crystallization temperatures calculated using the REE-thermometer of Sun and Liang (2017; doi:10.1007/s00410-016-1326-9) vary between 1230 and 1300°C.
Keyword(s):
Formation of Layered Gabbros; Lower Oceanic Crust; Oman Ophiolite
Related to:
Mock, Dominik; Neave, David Axford; Müller, S; Garbe-Schönberg, Dieter; Namur, Olivier; Ildefonse, Benoit; Koepke, Jürgen (2021): Formation of igneous layering in the lower oceanic crust from the Samail Ophiolite, Sultanate of Oman. Journal of Geophysical Research: Solid Earth, 126, e2020JB019573, https://doi.org/10.1029/2020JB019573
Further details:
LA-ICP-MS_accuracy-control
LA-ICP-MS_calibration-material
LA-ICP-MS_data
Coverage:
Latitude: 23.092960 * Longitude: 58.104060
Minimum DEPTH, sediment/rock: 0.0400 m * Maximum DEPTH, sediment/rock: 2.6795 m
Event(s):
OM10-Sam (Wadi Somerah, Sumail block) * Latitude: 23.092960 * Longitude: 58.104060 * Elevation: 720.0 m * Location: Oman * Method/Device: Drilling/coring
Comment:
OM10-Sam: layer 6= 0-8 cm, layer 5= 8-57 cm, layer 4= 57-95 cm, layer 3= 95-136 cm, layer 2= 136-205 cm, layer 1= 205-285 cm
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Layer numberLayerMock, Dominik
2Event layer typeELTMock, Dominik
3Sample code/labelSample labelMock, Dominik
4DEPTH, sediment/rockDepth sedmMock, DominikGeocode – center of the thin-section/domain measured from top of the profile
5MineralsMineralsMock, Dominik
6AnalysisAnalysisMock, Dominik
7Number of measurementsn#Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
8CalciumCa%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MSmajor element concentration (in weight percent) for Ca used as internal standard
9ZirconiumZr%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
10LanthanumLa%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
11CeriumCe%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
12PromethiumPm%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
13NeodymiumNd%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
14SamariumSm%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
15EuropiumEu%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
16GadoliniumGd%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
17TerbiumTb%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
18DysprosiumDy%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
19YttriumY%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
20HolmiumHo%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
21ErbiumEr%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
22ThuliumTm%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
23YtterbiumYb%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
24LutetiumLu%Mock, Dominik193 nm ArF excimer laser ablation system (GeoLasPro HD, Coherent) coupled to Agilent 7900s ICP-MS
25Crystallisation temperatureCryst T°CMock, Dominikcalculated using the REE (rare earth element) thermometer of Sun and Liang (2017)
26Crystallisation temperature, standard deviationCryst temp std dev±Mock, Dominik
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
600 data points

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