Reference Compositions

This page presents the range of compositions within the reference compositon database accessible within pyrolite. It’s currently a work in progress, but will soon contain extended descriptions and notes for some of the compositions and associated references.

import matplotlib.pyplot as plt

from pyrolite.geochem.norm import all_reference_compositions, get_reference_composition

refcomps = all_reference_compositions()
norm = "Chondrite_PON"  # a constant composition to normalise to

Chondrites

fltr = lambda c: c.reservoir == "Chondrite"
compositions = [x for (name, x) in refcomps.items() if fltr(x)]

fig, ax = plt.subplots(1)
for composition in compositions:
    composition.set_units("ppm")
    df = composition.comp.pyrochem.normalize_to(norm, units="ppm")
    df.pyroplot.REE(unity_line=True, ax=ax, label=composition.name)
ax.legend()
plt.show()

Mantle

Primitive Mantle & Pyrolite

fltr = lambda c: c.reservoir in ["PrimitiveMantle", "BSE"]
compositions = [x for (name, x) in refcomps.items() if fltr(x)]

fig, ax = plt.subplots(1)
for composition in compositions:
    composition.set_units("ppm")
    df = composition.comp.pyrochem.normalize_to(norm, units="ppm")
    df.pyroplot.REE(unity_line=True, ax=ax, label=composition.name)
ax.legend()
plt.show()

Depleted Mantle

fltr = lambda c: ("Depleted" in c.reservoir) & ("Mantle" in c.reservoir)
compositions = [x for (name, x) in refcomps.items() if fltr(x)]

fig, ax = plt.subplots(1)
for composition in compositions:
    composition.set_units("ppm")
    df = composition.comp.pyrochem.normalize_to(norm, units="ppm")
    df.pyroplot.REE(unity_line=True, ax=ax, label=composition.name)
ax.legend()
plt.show()

Mid-Ocean Ridge Basalts (MORB)

Average MORB, NMORB

fltr = lambda c: c.reservoir in ["MORB", "NMORB"]
compositions = [x for (name, x) in refcomps.items() if fltr(x)]

fig, ax = plt.subplots(1)
for composition in compositions:
    composition.set_units("ppm")
    df = composition.comp.pyrochem.normalize_to(norm, units="ppm")
    df.pyroplot.REE(unity_line=True, ax=ax, label=composition.name)
ax.legend()
plt.show()

Enriched MORB

fltr = lambda c: "EMORB" in c.reservoir
compositions = [x for (name, x) in refcomps.items() if fltr(x)]

fig, ax = plt.subplots(1)
for composition in compositions:
    composition.set_units("ppm")
    df = composition.comp.pyrochem.normalize_to(norm, units="ppm")
    df.pyroplot.REE(unity_line=True, ax=ax, label=composition.name)
ax.legend()
plt.show()

Ocean Island Basalts

fltr = lambda c: "OIB" in c.reservoir
compositions = [x for (name, x) in refcomps.items() if fltr(x)]

fig, ax = plt.subplots(1)
for composition in compositions:
    composition.set_units("ppm")
    df = composition.comp.pyrochem.normalize_to(norm, units="ppm")
    df.pyroplot.REE(unity_line=True, ax=ax, label=composition.name)
ax.legend()
plt.show()

Continental Crust

Bulk Continental Crust

fltr = lambda c: c.reservoir == "BulkContinentalCrust"
compositions = [x for (name, x) in refcomps.items() if fltr(x)]

fig, ax = plt.subplots(1)
for composition in compositions:
    composition.set_units("ppm")
    df = composition.comp.pyrochem.normalize_to(norm, units="ppm")
    df.pyroplot.REE(unity_line=True, ax=ax, label=composition.name)
ax.legend()
plt.show()

Upper Continental Crust

fltr = lambda c: c.reservoir == "UpperContinentalCrust"
compositions = [x for (name, x) in refcomps.items() if fltr(x)]

fig, ax = plt.subplots(1)
for composition in compositions:
    composition.set_units("ppm")
    df = composition.comp.pyrochem.normalize_to(norm, units="ppm")
    df.pyroplot.REE(unity_line=True, ax=ax, label=composition.name)
ax.legend()
plt.show()

Mid-Continental Crust

fltr = lambda c: c.reservoir == "MidContinentalCrust"
compositions = [x for (name, x) in refcomps.items() if fltr(x)]

fig, ax = plt.subplots(1)
for composition in compositions:
    composition.set_units("ppm")
    df = composition.comp.pyrochem.normalize_to(norm, units="ppm")
    df.pyroplot.REE(unity_line=True, ax=ax, label=composition.name)
ax.legend()
plt.show()

Lower Continental Crust

fltr = lambda c: c.reservoir == "LowerContinentalCrust"
compositions = [x for (name, x) in refcomps.items() if fltr(x)]

fig, ax = plt.subplots(1)
for composition in compositions:
    composition.set_units("ppm")
    df = composition.comp.pyrochem.normalize_to(norm, units="ppm")
    df.pyroplot.REE(unity_line=True, ax=ax, label=composition.name)
ax.legend()
plt.show()

Shales

fltr = lambda c: "Shale" in c.reservoir
compositions = [x for (name, x) in refcomps.items() if fltr(x)]

fig, ax = plt.subplots(1)
for composition in compositions:
    composition.set_units("ppm")
    df = composition.comp.pyrochem.normalize_to(norm, units="ppm")
    df.pyroplot.REE(unity_line=True, ax=ax, label=composition.name)
ax.legend()
plt.show()

Composition List

UCC_McLennan2001: UCC_McLennan2001 Model of UpperContinentalCrust from McLennan (2001).
Citation: McLennan, S.M. (2001). Relationships between the trace element composition of sedimentary rocks and upper continental crust. Geochemistry, Geophysics, Geosystems 2.
doi: 10.1029/2000GC000109
UCC_RG2003: UCC_RG2003 Model of UpperContinentalCrust from Rudnick & Gao (2003).
Citation: Rudnick, R.L., Gao, S. (2003). Composition of the Continental Crust. Treatise on Geochemistry 3, 1-64.
doi: 10.1016/B0-08-043751-6/03016-4
UCC_RG2014: UCC_RG2014 Model of UpperContinentalCrust from Rudnick & Gao (2014).
Citation: Rudnick, R.L., Gao, S. (2014). 4.1 - Composition of the Continental Crust, in: Holland, H.D., Turekian, K.K. (Eds.), Treatise on Geochemistry (Second Edition). Elsevier, Oxford, pp. 1-51.
doi: 10.1016/B978-0-08-095975-7.00301-6
Pyrolite_MS95: Pyrolite_MS95 Model of BSE from McDonough & Sun (1995).
Citation: McDonough, W.F., Sun, S. -s., 1995. The composition of the Earth. Chemical Geology, Chemical Evolution of the Mantle 120, 223-253.
doi: 10.1016/0009-2541(94)00140-4
PAAS_Pourmand2012: PAAS_Pourmand2012 Model of PostArcheanAustralianShale from Pourmand et al. (2012).
Citation: Pourmand, A., Dauphas, N., Ireland, T.J. (2012). A novel extraction chromatography and MC-ICP-MS technique for rapid analysis of REE, Sc and Y: Revising CI-chondrite and Post-Archean Australian Shale (PAAS) abundances. Chemical Geology 291, 38-54.
doi: 10.1016/j.chemgeo.2011.08.011
PAAS_TM1985: PAAS_TM1985 Model of PostArcheanAustralianShale from Taylor & McLennan (1985); McLennan (2001).
Citation: Taylor, S.R., McLennan, S.M. (1985). The Continental Crust: Its Composition and Evolution. Blackwell Scientific Publications.
ARS_Condie1993: ARS_Condie1993 Model of ArcheanCratonicShale from Condie (1993).
Citation: Condie, K.C., 1993. Chemical composition and evolution of the upper continental crust: Contrasting results from surface samples and shales. Chemical Geology 104, 1-37.
doi: 10.1016/0009-2541(93)90140-E
BCC_McLennan2001: BCC_McLennan2001 Model of BulkContinentalCrust from McLennan (2001).
Citation: McLennan, S.M. (2001). Relationships between the trace element composition of sedimentary rocks and upper continental crust. Geochemistry, Geophysics, Geosystems 2.
doi: 10.1029/2000GC000109
BCC_RG2003: BCC_RG2003 Model of BulkContinentalCrust from Rudnick & Gao (2003).
Citation: Rudnick, R.L., Gao, S. (2003). Composition of the Continental Crust. Treatise on Geochemistry 3, 1-64.
doi: 10.1016/B0-08-043751-6/03016-4
BCC_RG2014: BCC_RG2014 Model of BulkContinentalCrust from Rudnick & Gao (2014).
Citation: Rudnick, R.L., Gao, S. (2014). 4.1 - Composition of the Continental Crust, in: Holland, H.D., Turekian, K.K. (Eds.), Treatise on Geochemistry (Second Edition). Elsevier, Oxford, pp. 1-51.
doi: 10.1016/B978-0-08-095975-7.00301-6
DMORB_Gale2013: DMORB_Gale2013 Model of DMORB from Gale et al. (2013).
Citation: Gale, A., Dalton, C.A., Langmuir, C.H., Su, Y., Schilling, J. (2013). The mean composition of ocean ridge basalts. Geochemistry, Geophysics, Geosystems 14, 489-518.
doi: 10.1029/2012GC004334
MORB_Gale2013: MORB_Gale2013 Model of MORB from Gale et al. (2013).
Citation: Gale, A., Dalton, C.A., Langmuir, C.H., Su, Y., Schilling, J. (2013). The mean composition of ocean ridge basalts. Geochemistry, Geophysics, Geosystems 14, 489-518.
doi: 10.1029/2012GC004334
MUQ_Kamber2005: MUQ_Kamber2005 Model of MudFromQueensland from Kamber et al. (2005).
Citation: Kamber, B.S., Greig, A., Collerson, K.D. (2005). A new estimate for the composition of weathered young upper continental crust from alluvial sediments, Queensland, Australia. Geochimica et Cosmochimica Acta 69, 1041-1058.
doi: 10.1016/j.gca.2004.08.020
OIB_SM89: OIB_SM89 Model of OIB from Sun & McDonough (1989).
Citation: Sun, S. -s, McDonough, W.F. (1989). Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. Geological Society, London, Special Publications 42, 313-345.
doi: 10.1144/GSL.SP.1989.042.01.19
PM_PON: PM_PON Model of PrimitiveMantle from Palme and O'Neill (2014).
Citation: Palme, H., O-Neill, H.St.C. (2014). Cosmochemical Estimates of Mantle Composition. Treatise on Geochemistry (Second Edition) 3, 1-39.
doi: 10.1016/B978-0-08-095975-7.00201-1
PM_SM89: PM_SM89 Model of PrimitiveMantle from Sun & McDonough (1989).
Citation: Sun, S. -s, McDonough, W.F. (1989). Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. Geological Society, London, Special Publications 42, 313-345.
doi: 10.1144/GSL.SP.1989.042.01.19
D-DMM_WH2005: D-DMM_WH2005 Model of DepletedDepletedMORBMantle from Workman & Hart (2005).
Citation: Workman, R.K., Hart, S.R., 2005. Major and trace element composition of the depleted MORB mantle (DMM). Earth and Planetary Science Letters 231, 53-72.
doi: 10.1016/j.epsl.2004.12.005
PHS_Condie1993: PHS_Condie1993 Model of PhanerozoicCratonicShale from Condie (1993).
Citation: Condie, K.C., 1993. Chemical composition and evolution of the upper continental crust: Contrasting results from surface samples and shales. Chemical Geology 104, 1-37.
doi: 10.1016/0009-2541(93)90140-E
LCC_McLennan2001: LCC_McLennan2001 Model of LowerContinentalCrust from McLennan (2001).
Citation: McLennan, S.M. (2001). Relationships between the trace element composition of sedimentary rocks and upper continental crust. Geochemistry, Geophysics, Geosystems 2.
doi: 10.1029/2000GC000109
LCC_RG2003: LCC_RG2003 Model of LowerContinentalCrust from Rudnick & Gao (2003).
Citation: Rudnick, R.L., Gao, S. (2003). Composition of the Continental Crust. Treatise on Geochemistry 3, 1-64.
doi: 10.1016/B0-08-043751-6/03016-4
LCC_RG2014: LCC_RG2014 Model of LowerContinentalCrust from Rudnick & Gao (2014).
Citation: Rudnick, R.L., Gao, S. (2014). 4.1 - Composition of the Continental Crust, in: Holland, H.D., Turekian, K.K. (Eds.), Treatise on Geochemistry (Second Edition). Elsevier, Oxford, pp. 1-51.
doi: 10.1016/B978-0-08-095975-7.00301-6
Chondrite_MS95: Chondrite_MS95 Model of Chondrite from McDonough & Sun (1995).
Citation: McDonough, W.F., Sun, S. -s., 1995. The composition of the Earth. Chemical Geology, Chemical Evolution of the Mantle 120, 223-253.
doi: 10.1016/0009-2541(94)00140-4
Chondrite_PON: Chondrite_PON Model of Chondrite from Palme and O'Neill (2014).
Citation: Palme, H., O-Neill, H.St.C. (2014). Cosmochemical Estimates of Mantle Composition. Treatise on Geochemistry (Second Edition) 3, 1-39.
doi: 10.1016/B978-0-08-095975-7.00201-1
ChondriteREE_ON: ChondriteREE_ON Model of Chondrite from O'Neill (2016).
Citation: O-Neill, H.S.C. (2016). The Smoothness and Shapes of Chondrite-normalized Rare Earth Element Patterns in Basalts. J Petrology 57, 1463-1508.
doi: 10.1093/petrology/egw047
Chondrite_SM89: Chondrite_SM89 Model of Chondrite from Sun & McDonough (1989).
Citation: Sun, S. -s, McDonough, W.F. (1989). Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. Geological Society, London, Special Publications 42, 313-345.
doi: 10.1144/GSL.SP.1989.042.01.19
EUS_Bau2018: EUS_Bau2018 Model of EuropeanShale from Bau et al. (2018).
Citation: Bau, M., Schmidt, K., Pack, A., Bendel, V., Kraemer, D. (2018). The European Shale: An improved data set for normalisation of rare earth element and yttrium concentrations in environmental and biological samples from Europe. Applied Geochemistry 90, 142-149.
doi: 10.1016/j.apgeochem.2018.01.008
DMM_WH2005: DMM_WH2005 Model of DepletedMORBMantle from Workman & Hart (2005).
Citation: Workman, R.K., Hart, S.R., 2005. Major and trace element composition of the depleted MORB mantle (DMM). Earth and Planetary Science Letters 231, 53-72.
doi: 10.1016/j.epsl.2004.12.005
PRS_Condie1993: PRS_Condie1993 Model of ProterozoicCratonicShale from Condie (1993).
Citation: Condie, K.C., 1993. Chemical composition and evolution of the upper continental crust: Contrasting results from surface samples and shales. Chemical Geology 104, 1-37.
doi: 10.1016/0009-2541(93)90140-E
EMORB_Gale2013: EMORB_Gale2013 Model of EMORB from Gale et al. (2013).
Citation: Gale, A., Dalton, C.A., Langmuir, C.H., Su, Y., Schilling, J. (2013). The mean composition of ocean ridge basalts. Geochemistry, Geophysics, Geosystems 14, 489-518.
doi: 10.1029/2012GC004334
EMORB_SM89: EMORB_SM89 Model of EMORB from Sun & McDonough (1989).
Citation: Sun, S. -s, McDonough, W.F. (1989). Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. Geological Society, London, Special Publications 42, 313-345.
doi: 10.1144/GSL.SP.1989.042.01.19
GLOSS2_P2014: GLOSS2_P2014 Model of GLOSS from Plank (2014).
Citation: Plank, T. (2014). The Chemical Composition of Subducting Sediments. Treatise on Geochemistry (Second Edition) 607-629.
doi: 10.1016/B978-0-08-095975-7.00319-3
GLOSS_P2014: GLOSS_P2014 Model of GLOSS from Plank (2014).
Citation: Plank, T. (2014). The Chemical Composition of Subducting Sediments. Treatise on Geochemistry (Second Edition) 607-629.
doi: 10.1016/B978-0-08-095975-7.00319-3
E-DMM_WH2005: E-DMM_WH2005 Model of EnrichedDepletedMORBMantle from Workman & Hart (2005).
Citation: Workman, R.K., Hart, S.R., 2005. Major and trace element composition of the depleted MORB mantle (DMM). Earth and Planetary Science Letters 231, 53-72.
doi: 10.1016/j.epsl.2004.12.005
MCC_RG2014: MCC_RG2014 Model of MidContinentalCrust from Rudnick & Gao (2014).
Citation: Rudnick, R.L., Gao, S. (2014). 4.1 - Composition of the Continental Crust, in: Holland, H.D., Turekian, K.K. (Eds.), Treatise on Geochemistry (Second Edition). Elsevier, Oxford, pp. 1-51.
doi: 10.1016/B978-0-08-095975-7.00301-6
DM_SS2004: DM_SS2004 Model of DepletedMantle from Salters & Strake (2004).
Citation: Salters, V.J.M., Stracke, A., 2004. Composition of the depleted mantle. Geochemistry, Geophysics, Geosystems 5.
doi: 10.1029/2003GC000597
NASC_Gromet1984: NASC_Gromet1984 Model of NorthAmericanShaleComposite from Gromet et al. (1984); Taylor and McLennan (1985); Condie (1993); McLennan (2001).
Citation: Gromet, L.P., Haskin, L.A., Korotev, R.L., Dymek, R.F. (1984). The -North American shale composite-: Its compilation, major and trace element characteristics. Geochimica et Cosmochimica Acta 48, 2469-2482.
doi: 10.1016/0016-7037(84)90298-9
NMORB_Gale2013: NMORB_Gale2013 Model of NMORB from Gale et al. (2013).
Citation: Gale, A., Dalton, C.A., Langmuir, C.H., Su, Y., Schilling, J. (2013). The mean composition of ocean ridge basalts. Geochemistry, Geophysics, Geosystems 14, 489-518.
doi: 10.1029/2012GC004334
NMORB_SM89: NMORB_SM89 Model of NMORB from Sun & McDonough (1989).
Citation: Sun, S. -s, McDonough, W.F. (1989). Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. Geological Society, London, Special Publications 42, 313-345.
doi: 10.1144/GSL.SP.1989.042.01.19