ライフサイエンスコーパス: mid-ocean ridge basalt

1 an isotopic signature indistinguishable from mid-ocean ridge basalt.

2 the highest values previously measured in a mid-ocean-ridge basalt.

3 ction of melt and recycling of the resulting mid-ocean-ridge basalt.

4 sulphur and chlorine in the source of normal mid-ocean-ridge basalt.

5 rc magmas are indistinguishable from that of mid-ocean ridge basalts.

6 dified mantle have rarely been recognized in mid-ocean ridge basalts.

7 d as Delta(199)Hg) in island arc basalts and mid-ocean ridge basalts.

8 e key drivers creating variable chemistry in mid-ocean ridge basalts.

9 nd enriched in sulfur-34 ((34)S) compared to mid-ocean ridge basalts.

10 idge basalts but is nearly absent in Pacific mid-ocean ridge basalts.

11 riking chemical and isotopic similarities to mid-ocean-ridge basalts.

12 ve helium concentrations of ocean island and mid-ocean-ridge basalts.

13 es to rise to become the source material for mid-ocean-ridge basalts.

14 peridotite can indeed be the sole source for mid-ocean-ridge basalts.

15 nents as sampled by ocean island basalts and mid-ocean-ridge basalts.

16 now recognized as the upper-mantle source of mid-ocean-ridge basalts(1).

17 imates for the convective mantle provided by mid-ocean-ridge basalts(11), consistent with subducted n

18 We report that most modern-day mid-ocean ridge basalt and ocean island basalt samples a

19 tectonic cycle produces chemically distinct mid-ocean ridge basalts and arc volcanics, with the latt

20 roximately an order of magnitude relative to mid-ocean ridge basalts and contain two Cl-bearing compo

21 ts are very similar to primitive terrestrial mid-ocean ridge basalts and indicate that some parts of

22 r mantle, produce the isotopic signatures of mid-ocean ridge basalts and oceanic island basalts, and

23 We propose instead that high mid-ocean-ridge basalt and plume delta(15)N values may b

24 he differences in (3)He/(4)He ratios between mid-ocean-ridge basalts and ocean island basalts, as wel

25 Many arc lavas are more oxidized than mid-ocean-ridge basalts and subduction introduces oxidiz

26 mantle, beneath the upper mantle sampled by mid-ocean-ridge basalts, and that buoyantly upwelling pl

27 velocity structure as the possible source of Mid-Ocean Ridge Basalts- and Ocean Island Basalts- type

28 stinct chemical signatures, ocean-island and mid-ocean-ridge basalts are traditionally inferred to ar

29 th the dominant 4He/3He peak found in modern mid-ocean-ridge basalts, as well as estimates of the ini

30 hese hotspot groups are also detected in the mid-ocean ridge basalts at the location where the finger

31 d basalts (OIBs) have lower Re contents than mid-ocean ridge basalt, because garnet-bearing residues

32 an also be identified in Atlantic and Indian mid-ocean ridge basalts but is nearly absent in Pacific

33 , ocean ridge depths, and the composition of mid-ocean ridge basalts can all be used to determine var

34 Global correlations of mid-ocean-ridges basalt chemistry, axial depth and crust

35 odels of melt extraction from the mantle and mid-ocean-ridge basalt differentiation.

36 vement of Icelandic plume (OIB) and Enriched Mid-Ocean Ridge Basalt (EMORB) in magma genesis.

37 s (NMORBs) and incompatible element-enriched mid-ocean ridge basalts (EMORBs) as far as 20 kilometers

38 Here we show that mid-ocean ridge basalts from 2,000 km along the southeas

39 bon isotopic measurements on rare undegassed mid-ocean ridge basalts from the Pacific, Atlantic, and

40 pre-eruptive volatile content for a suite of mid-ocean-ridge basalts from the Siqueiros intra-transfo

41 Through a global survey of mid-ocean ridge basalt glasses, we show that mantle oxid

42 The observation that mid-ocean ridge basalts had ~3x higher iodine/plutonium

43 e origin of the isotopic signature of Indian mid-ocean ridge basalts has remained enigmatic, because

44 Primary arc and mid-ocean ridge basalts have identical Cu contents, indi

45 have Li contents and Li/Y ratios similar to mid-ocean ridge basalts, indicating that the subducting

46 , presumably because the volatile content of mid-ocean-ridge basalts is generally too low to produce

47 In contrast, the upper mantle, as sampled by mid-ocean ridge basalts, is highly depleted in incompati

48 made for degassed and chlorine-contaminated mid-ocean-ridge basalt magmas, and hence constrain degas

49 e magma is ~1 to 2 orders lower than that of mid-ocean ridge basalt (MORB) and comparable to the ultr

50 Geophysical detection of subducted mid-ocean ridge basalt (MORB) in the lower mantle is hin

51 ial Xe isotopes in Yellowstone compared with mid-ocean ridge basalt (MORB) samples, this confirms tha

52 s on the displacement process of the Pacific mid-ocean ridge basalt (MORB)-type mantle by the Indian

53 Radiogenic isotope variations in mid-ocean ridge basalts (MORB) are commonly attributed t

54 Arc volcanics are more oxidized than mid-ocean ridge basalts (MORB), but it is debated whethe

55 timate of halogen abundances in the depleted mid-ocean ridge basalts (MORB)-source mantle, the enrich

56 and siderophile element (CSE) contents than mid-ocean ridge basalts (MORB).

57 in incompatible elements than the source of mid-ocean ridge basalts (MORB).

58 Chemical differences between mid-ocean ridge basalts (MORBs) and ocean island basalts

59 Linear arrays in lead isotope space for mid-ocean ridge basalts (MORBs) converge on a single end

60 Iceland, can be up to sixfold higher than in mid-ocean ridge basalts (MORBs).

61 Mid-ocean-ridge basalts (MORBs) are the most abundant te

62 We also find that mid-ocean-ridge basalts (MORBs) have (238)U/(235)U ratio

63 in ocean island basalts (OIBs) compared with mid-ocean-ridge basalts (MORBs) have been used as eviden

64 with lower and relatively uniform values in mid-ocean-ridge basalts (MORBs), are thought to result f

65 e assumed to represent the mantle residue of mid-ocean-ridge basalts (MORBs).

66 an the modern upper mantle sampled by normal mid-ocean ridge basalts (N-MORBs).

67 ndicate near-symmetrical eruptions of normal mid-ocean ridge basalts (NMORBs) and incompatible elemen

68 o reference buffers, fO(2)s of mantle melts (mid-ocean ridge basalts, or MORBs) and their presumed ma

69 the incompatible element-depleted source of mid-ocean ridge basalts, possibly as a result of a globa

70 We report 230Th-238U disequilibrium data on mid-ocean ridge basalts recovered 5 to 40 kilometers off

71 Here we use (40)Ar/(39)Ar isotopic dating of mid-ocean ridge basalts recovered at variable distances

72 Here we report the first mid-ocean ridge basalt samples with distinct arc signatu

73 nough to affect major portions of the Indian mid-ocean ridge basalt source region has been a long-sta

74 ved heat flux and the heat production of the mid-ocean ridge basalt source region.

75 higher in nickel content than in the modern mid-ocean-ridge basalt source.

76 tion of compositional similarity between all mid-ocean-ridge basalt sources.

77 mitive arc magmas have identical Zn/Fe(T) to mid-ocean-ridge basalts, suggesting that primary mantle

78 o the lower (3)He/(4)He ratios identified in mid-ocean-ridge basalts that form by melting the upper m

79 per mil ( per thousand), than the canonical mid-ocean ridge basalt value of -6.0 per thousand.

80 and) basalts seem to contain more water than mid-ocean-ridge basalts, we demonstrate that basalts ass

81 Two-thirds of the Earth is covered by mid-ocean ridge basalts, which form along a network of d

82 (22)Ne ratios between deep mantle plumes and mid-ocean-ridge basalts, which is best explained by addi

83 5 per cent relative to 226Ra occur in normal mid-ocean ridge basalts, with the largest deficits in th