FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2057187328> ?p ?o ?g. }

• W2057187328 endingPage "286" @default.
• W2057187328 startingPage "273" @default.
• W2057187328 abstract "The old, stable cores of continents – cratons – are underlain by thick and cold mantle keels, composed of melt-depleted and low density peridotite residues. The origins of these thick keels are debated. Were these thick keels formed in situ, by orogenic thickening, or by underplating of buoyant residual mantle? Key to this debate is determining the temperature and pressure at which the protoliths of cratonic peridotites melted (igneous protolith conditions) and comparing to their metamorphic (subsolidus) temperatures and pressures within the keel. This paper presents a method for explicit calculation of the temperatures and pressures at which the peridotite protoliths melted. The approach relies only on the bulk FeO and MgO of residual peridotites. A system of equations consisting of mass balance and new calibrations of Mg peridotite/melt partitioning and melt productivity is then solved simultaneously. The igneous protoliths of abyssal peridotites are found to have melted at effective pressures of 1–2 GPa and temperatures of 1300–1400 °C, within error of the magmatic temperatures and pressures of melt extraction inferred independently from the SiO2 and MgO contents of mid-ocean ridge basalts. Archean cratonic peridotites, after filtering for the secondary effects of refertilization and orthopyroxene-metasomatism, give igneous protolith pressures and temperatures of 1–5 GPa (30–150 km) and 1400–1750 °C, similar to magmatic temperatures and pressures determined for Archean basalts thought to be representative of the thermal state of the Archean ambient mantle. Most importantly, cratonic peridotite protolith pressures and temperatures are shallower and hotter than their subsolidus equilibration pressures (3–7.5 GPa; 90–200 km) and temperatures (900–1300 °C), which reflects the recent thermal state of the cratonic lithosphere. Specifically, for individual samples with both melting and subsolidus thermobarometric constraints, we find that subsolidus pressures are 1–2 GPa (30–60 km) higher than their igneous protolith pressures although some of the deepest samples experienced minor increases in pressure. Collectively, these results support the suggestion that the building blocks of cratons were generated by hot shallow melting with a mantle potential temperature 200–300 °C warmer than the present. This shallowly generated mantle was subsequently thickened during orogenic episodes, culminating in the formation of a thick, stable craton. Whether such thickening has any modern analogs cannot be answered from this work alone." @default.
• W2057187328 created "2016-06-24" @default.
• W2057187328 creator A5000404492 @default.
• W2057187328 creator A5052287151 @default.
• W2057187328 date "2014-10-01" @default.
• W2057187328 modified "2023-10-01" @default.
• W2057187328 title "Calculating melting temperatures and pressures of peridotite protoliths: Implications for the origin of cratonic mantle" @default.
• W2057187328 cites W1489411196 @default.
• W2057187328 cites W1509769237 @default.
• W2057187328 cites W1540907122 @default.
• W2057187328 cites W1568052543 @default.
• W2057187328 cites W1570616276 @default.
• W2057187328 cites W1629623139 @default.
• W2057187328 cites W1671054346 @default.
• W2057187328 cites W1739136493 @default.
• W2057187328 cites W1879999282 @default.
• W2057187328 cites W1964175282 @default.
• W2057187328 cites W1964865374 @default.
• W2057187328 cites W1966340877 @default.
• W2057187328 cites W1967671103 @default.
• W2057187328 cites W1968409651 @default.
• W2057187328 cites W1968661035 @default.
• W2057187328 cites W1969859799 @default.
• W2057187328 cites W1970458022 @default.
• W2057187328 cites W1973876227 @default.
• W2057187328 cites W1975544638 @default.
• W2057187328 cites W1977202349 @default.
• W2057187328 cites W1977507304 @default.
• W2057187328 cites W1978801698 @default.
• W2057187328 cites W1981122034 @default.
• W2057187328 cites W1982255582 @default.
• W2057187328 cites W1988024307 @default.
• W2057187328 cites W1988824964 @default.
• W2057187328 cites W1989705035 @default.
• W2057187328 cites W1997086514 @default.
• W2057187328 cites W1997875863 @default.
• W2057187328 cites W1999102374 @default.
• W2057187328 cites W2001443300 @default.
• W2057187328 cites W2003424749 @default.
• W2057187328 cites W2004252637 @default.
• W2057187328 cites W2005096309 @default.
• W2057187328 cites W2005426441 @default.
• W2057187328 cites W2006185623 @default.
• W2057187328 cites W2007377958 @default.
• W2057187328 cites W2007684610 @default.
• W2057187328 cites W2008787240 @default.
• W2057187328 cites W2009134313 @default.
• W2057187328 cites W2009482731 @default.
• W2057187328 cites W2010432538 @default.
• W2057187328 cites W2012177214 @default.
• W2057187328 cites W2014783682 @default.
• W2057187328 cites W2015970947 @default.
• W2057187328 cites W2018780721 @default.
• W2057187328 cites W2024674080 @default.
• W2057187328 cites W2025099137 @default.
• W2057187328 cites W2027323798 @default.
• W2057187328 cites W2029407151 @default.
• W2057187328 cites W2032840455 @default.
• W2057187328 cites W2034429579 @default.
• W2057187328 cites W2034688166 @default.
• W2057187328 cites W2035081532 @default.
• W2057187328 cites W2035347372 @default.
• W2057187328 cites W2035651914 @default.
• W2057187328 cites W2039711575 @default.
• W2057187328 cites W2040092205 @default.
• W2057187328 cites W2041507297 @default.
• W2057187328 cites W2042560931 @default.
• W2057187328 cites W2042572559 @default.
• W2057187328 cites W2042956810 @default.
• W2057187328 cites W2046009013 @default.
• W2057187328 cites W2046141409 @default.
• W2057187328 cites W2048689831 @default.
• W2057187328 cites W2050625664 @default.
• W2057187328 cites W2051245490 @default.
• W2057187328 cites W2052473341 @default.
• W2057187328 cites W2054486238 @default.
• W2057187328 cites W2056207362 @default.
• W2057187328 cites W2056501220 @default.
• W2057187328 cites W2059013108 @default.
• W2057187328 cites W2060401165 @default.
• W2057187328 cites W2060439178 @default.
• W2057187328 cites W2062434225 @default.
• W2057187328 cites W2062995566 @default.
• W2057187328 cites W2064252656 @default.
• W2057187328 cites W2065009202 @default.
• W2057187328 cites W2066025727 @default.
• W2057187328 cites W2067173167 @default.
• W2057187328 cites W2067346892 @default.
• W2057187328 cites W2067498280 @default.
• W2057187328 cites W2071328049 @default.
• W2057187328 cites W2071583796 @default.
• W2057187328 cites W2076275239 @default.
• W2057187328 cites W2076365481 @default.
• W2057187328 cites W2076369135 @default.
• W2057187328 cites W2077960475 @default.
• W2057187328 cites W2079085668 @default.
• W2057187328 cites W2079091258 @default.
• W2057187328 cites W2079504170 @default.

• next