**Muller, M R; Robinson, C J; Minshull, Tim A; White, R S; Bickle, Michael J (1997):** Major and rare earth element concentrations of basalts beneath ODP Hole 118-735B (Table 3). *PANGAEA*, https://doi.org/10.1594/PANGAEA.715007,
*Supplement to:* Muller, MR et al. (1997): Thin crust beneath ocean drilling program borehole 735B at the Southwest Indian Ridge? *Earth and Planetary Science Letters*, **148(1-2)**, 93-107, https://doi.org/10.1016/S0012-821X(97)00030-7

**Always quote above citation when using data!** You can download the citation in several formats below.

Abstract:

A wide-angle seismic experiment at the Atlantis II Fracture Zone, Southwest Indian Ridge, together with geochemical analyses of dredged basalt glass samples from a site conjugate to Ocean Drilling Program hole 735B has allowed determination of the thickness and the most likely lithological composition of the crust beneath hole 735B. The measured Na, composition of 3.3 +/- 0.1 corresponds to a melt thickness of 3 +/- 1 km, a result consistent with rare earth element inversions which indicate a melt thickness of between 1.5 and 4.5 km. The seismic crustal thickness to the north and south of the Atlantis Platform (on which hole 735B is located) is 4 +/- 1 km, and probably consists largely of magmatic material since the seismic and inferred melt thicknesses agree within experimental uncertainty. Beneath hole 735B itself. the Moho is at a depth of 5 +/- 1 km beneath the seafloor. The seismic model suggests that, on average. about 1 km of upper crust has been unroofed on the Atlantis Platform. However, allowing for the inferred local unroofing of 2 km of upper crust at 735B, the base of the magmatic crust beneath this location is probably about 2 km beneath the seafloor, and is underlain by a 2-3 km thick layer of serpentinised mantle peridotite. The P-wave velocity of 6.9 km/s for the serpentinised peridotite layer corresponds to a 35 +/- 10 vol% serpentine content. The Moho beneath hole 735B probably represents a serpentinisation front.

Coverage:

*Latitude:*-31.350000

** Longitude:*57.266700

*Minimum DEPTH, sediment/rock:*0 m

** Maximum DEPTH, sediment/rock:*0 m

Comment:

Each value is the average of 10 measurements. REE were analysed by ICP-MS and isotope dilution (5d-A)

Parameter(s):

# | Name | Short Name | Unit | Principal Investigator | Method | Comment |
---|---|---|---|---|---|---|

1 | LATITUDE | Latitude | Geocode | |||

2 | LONGITUDE | Longitude | Geocode | |||

3 | DEPTH, sediment/rock | Depth | m | Geocode | ||

4 | Sample code/label | Sample label | Muller, M R | |||

5 | Silicon dioxide | SiO2 | % | Muller, M R | Electron microprobe | |

6 | Silicon dioxide, standard deviation | SiO2 std dev | ± | Muller, M R | Electron microprobe | |

7 | Titanium dioxide | TiO2 | % | Muller, M R | Electron microprobe | |

8 | Titanium dioxide, standard deviation | TiO2 std dev | ± | Muller, M R | Electron microprobe | |

9 | Aluminium oxide | Al2O3 | % | Muller, M R | Electron microprobe | |

10 | Aluminium oxide, standard deviation | Al2O3 std dev | ± | Muller, M R | Electron microprobe | |

11 | Chromium(III) oxide | Cr2O3 | % | Muller, M R | Electron microprobe | |

12 | Chromium(III) oxide, standard deviation | Cr2O3 std dev | ± | Muller, M R | Electron microprobe | |

13 | Iron oxide, Fe2O3 | Fe2O3 | % | Muller, M R | Electron microprobe | |

14 | Iron oxide, FeO | FeO | % | Muller, M R | Electron microprobe | |

15 | Iron oxide, FeO, standard deviation | FeO std dev | ± | Muller, M R | Electron microprobe | |

16 | Manganese oxide | MnO | % | Muller, M R | Electron microprobe | |

17 | Manganese oxide, standard deviation | MnO std dev | ± | Muller, M R | Electron microprobe | |

18 | Calcium oxide | CaO | % | Muller, M R | Electron microprobe | |

19 | Calcium oxide, standard deviation | CaO std dev | ± | Muller, M R | Electron microprobe | |

20 | Potassium oxide | K2O | % | Muller, M R | Electron microprobe | |

21 | Potassium oxide, standard deviation | K2O std dev | ± | Muller, M R | Electron microprobe | |

22 | Sodium oxide | Na2O | % | Muller, M R | Electron microprobe | |

23 | Sodium oxide, standard deviation | Na2O std dev | ± | Muller, M R | Electron microprobe | |

24 | Magnesium oxide | MgO | % | Muller, M R | Electron microprobe | |

25 | Magnesium oxide, standard deviation | MgO std dev | ± | Muller, M R | Electron microprobe | |

26 | Phosphorus oxide | P2O5 | % | Muller, M R | Electron microprobe | |

27 | Phosphorus oxide, standard deviation | P2O5 std dev | ± | Muller, M R | Electron microprobe | |

28 | Magnesium number | Mg# | Muller, M R | |||

29 | Lanthanum | La | mg/kg | Muller, M R | ||

30 | Lanthanum, standard deviation | La std dev | ± | Muller, M R | ||

31 | Cerium | Ce | mg/kg | Muller, M R | ||

32 | Cerium, standard deviation | Ce std dev | ± | Muller, M R | ||

33 | Praseodymium | Pr | mg/kg | Muller, M R | ||

34 | Praseodymium, standard deviation | Pr std dev | ± | Muller, M R | ||

35 | Neodymium | Nd | mg/kg | Muller, M R | ||

36 | Neodymium, standard deviation | Nd std dev | ± | Muller, M R | ||

37 | Samarium | Sm | mg/kg | Muller, M R | ||

38 | Samarium, standard deviation | Sm std dev | ± | Muller, M R | ||

39 | Europium | Eu | mg/kg | Muller, M R | ||

40 | Europium, standard deviation | Eu std dev | ± | Muller, M R | ||

41 | Gadolinium | Gd | mg/kg | Muller, M R | ||

42 | Gadolinium, standard deviation | Gd std dev | ± | Muller, M R | ||

43 | Terbium | Tb | mg/kg | Muller, M R | ||

44 | Terbium, standard deviation | Tb std dev | ± | Muller, M R | ||

45 | Dysprosium | Dy | mg/kg | Muller, M R | ||

46 | Dysprosium, standard deviation | Dy std dev | ± | Muller, M R | ||

47 | Holmium | Ho | mg/kg | Muller, M R | ||

48 | Holmium, standard deviation | Ho std dev | ± | Muller, M R | ||

49 | Erbium | Er | mg/kg | Muller, M R | ||

50 | Erbium, standard deviation | Er std dev | ± | Muller, M R | ||

51 | Thulium | Tm | mg/kg | Muller, M R | ||

52 | Thulium, standard deviation | Tm std dev | ± | Muller, M R | ||

53 | Ytterbium | Yb | mg/kg | Muller, M R | ||

54 | Ytterbium, standard deviation | Yb std dev | ± | Muller, M R | ||

55 | Lutetium | Lu | mg/kg | Muller, M R | ||

56 | Lutetium, standard deviation | Lu std dev | ± | Muller, M R |

Size:

310 data points