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| Titel |
Origin of PGE-depleted Ni-Cu sulfide mineralization in the Triassic Hongqiling No.7 orthopyroxenite intrusion, Central Asian Orogenic Belt, NE China |
| VerfasserIn |
Yan Wang, Bo Wei |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250087401
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| Publikation (Nr.) |
 EGU/EGU2014-1446.pdf |
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| Zusammenfassung |
| The ~216 Ma Hongqiling No.7 intrusion is located in the southern margin of the
Central Asian Orogenic Belt, NE China. It hosts the second largest magmatic Ni-Cu
sulfide deposit in China. The intrusion crops out in an area of ~0.013 km2 on the
surface. It intruded gneisses and marbles of the Paleozoic Hulan Formation. The
intrusion is mainly composed of orthopyroxenite (~95 vol.%), with minor harzburgite
and norite. Over 90 vol.% of the intrusion contains disseminated, net-textured or
massive sulfides. The bulk sulfide ores (recalculated to 100% sulfide) have low
average PGE concentrations (5.6 ppb Os, 3.1 ppb Ir, 4.7 ppb Ru, 2.2 ppb Rh, 31 ppb
Pt and 11 ppb Pd) and high Cu/Pd ratios (3x105 to 3x107), consistent with the
compositions of sulfide liquids segregated from PGE-depleted magma. Olivine
composition (Fo |
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