Extraterrestrial3 He in marine polymetallic nodules: A potential method for measuring growth rate of nodules

Li, Yanhe; Song, Hebin; Li, Jincheng

doi:10.1007/bf02932205

Cited by 4 publications

(6 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous studies on deep-sea sediments [15][16][17][18][19] and nodules [41,43,44] and seamount crusts [46,47,50,69] in the open oceans suggested that the extremely high 3 He/ 4 He ratio reflects extraterrestrial inputs, such as IDPs. Helium isotope characteristics of individual IDPs collected in the stratosphere were analyzed, yielded 3 He/ 4 He ratios of mainly 2.4 × 10 −4 (172R A ) and the 3 He content of 1.9 × 10 −5 cm 3 ·STP·g −1 [70].…”

Section: Extraterrestrial Sourcementioning

confidence: 99%

“…Sano et al [41] first studied the He and Ar isotopes of the deep-sea nodules from the Ogasawara Islands and Mariana Trough and suggested that extremely high 3 He/ 4 He ratios are caused by the input of extraterrestrial material. Subsequently, the He isotopes of the deep-sea nodules from the Pacific Clarion-Clipperton Fracture Zone (CCFZ) were studied [42][43][44][45]. These researches founded that the deep-sea nodules have high 3 He contents and 3 He/ 4 He ratios (5-54 R A [42,45]) and that the sediments around the deep-sea nodules also have the high 3 He/ 4 He ratios [44].…”

mentioning

confidence: 99%

“…Subsequently, the He isotopes of the deep-sea nodules from the Pacific Clarion-Clipperton Fracture Zone (CCFZ) were studied [42][43][44][45]. These researches founded that the deep-sea nodules have high 3 He contents and 3 He/ 4 He ratios (5-54 R A [42,45]) and that the sediments around the deep-sea nodules also have the high 3 He/ 4 He ratios [44]. Thus, these authors considered that the deep-sea nodules and sediments may have mixed with the interplanetary dust particles (IDPs) and mantle source [42][43][44][45].…”

mentioning

confidence: 99%

“…These researches founded that the deep-sea nodules have high 3 He contents and 3 He/ 4 He ratios (5-54 R A [42,45]) and that the sediments around the deep-sea nodules also have the high 3 He/ 4 He ratios [44]. Thus, these authors considered that the deep-sea nodules and sediments may have mixed with the interplanetary dust particles (IDPs) and mantle source [42][43][44][45]. Previous research on the noble gases compositions of the seamount Fe-Mn crusts from the Pacific Ocean yielded different ideas with respect to the sources of the noble gases [46][47][48][49][50].…”

mentioning

confidence: 99%

See 3 more Smart Citations

Helium and Argon Isotopes in the Fe-Mn Polymetallic Crusts and Nodules from the South China Sea: Constraints on Their Genetic Sources and Origins

et al. 2018

View full text Add to dashboard Cite

In this study, the He and Ar isotope compositions were measured for the Fe-Mn polymetallic crusts and nodules from the South China Sea (SCS), using the high temperature bulk melting method and noble gases isotope mass spectrometry. The He and Ar of the SCS crusts/nodules exist mainly in the Fe-Mn mineral crystal lattice and terrigenous clastic mineral particles. The results show that the 3 He concentrations and R/R A values of the SCS crusts are generally higher than those of the SCS nodules, while 4 He and 40 Ar concentrations of the SCS crusts are lower than those of the SCS nodules. Comparison with the Pacific crusts and nodules, the SCS Fe-Mn crusts/nodules have lower 3 He concentrations and 3 He/ 4 He ratios (R/R A , 0.19 to 1.08) than those of the Pacific Fe-Mn crusts/nodules, while the 40 Ar/ 36 Ar ratios of the SCS samples are significantly higher than those of the Pacific counterparts. The relatively low 3 He/ 4 He ratios and high 40 Ar concentrations in the SCS samples are likely caused by terrigenous detrital input with high radiogenic 4 He and 40 Ar contents. The SCS crusts and nodules have shorter growth periods, implying that in situ post-formation radiogenic 3 He, 4 He and 40 Ar produced by decay of U, Th and K have no effect on their isotope compositions. Thus, the SCS crusts/nodules inherited the noble gases characteristics of their sources. Helium and Ar isotope compositions in the SCS Fe-Mn crusts and nodules reflect the product of an equilibrium mixture between air-saturated seawater and radiogenic components during their growth, while the partial 3 He excess in some SCS samples may represent a little mantle-derived origin. The different He and Ar isotope compositions of the Fe-Mn crusts and nodules between the South China Sea and the Pacific Ocean are due to their different sources and genetic processes. The characteristics of He and Ar isotope compositions in the SCS polymetallic crusts and nodules are similar to the properties of hydrogenetic Fe-Mn oxide/hydroxide precipitates, which reflects mainly the product of an equilibrium mixture between air-saturated seawater and radiogenic components.isotopes provide important geological information for the research of modern ocean circulation, paleoceanography, seafloor hydrothermal and cold brine system and ocean/atmosphere gas exchange.Early studies of marine noble gases are mainly concentrated in solving geochemical problems, such as tracing the excess He in the seawater, which is likely produced by U-Th series radioactive decay in the marine sediments [1,2]. After the discovery of mantle-originated helium [3] and 3 He originated near the sediment surface (via 3 H decay in the sea) [4], people began to use noble gases to trace the source of submarine hydrothermal fluids, crust/mantle material cycle, constrain the formation process and thermodynamic mechanism of seamount systems [5][6][7][8][9][10][11] and to explore the formation and cycle of the ocean currents (e.g., [12][13][14]).Some studies have explored potential application of He isotopes...

show abstract

Section: Extraterrestrial Sourcementioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Helium and Argon Isotopes in the Fe-Mn Polymetallic Crusts and Nodules from the South China Sea: Constraints on Their Genetic Sources and Origins

et al. 2018

View full text Add to dashboard Cite

show abstract

“…All the results of helium are given in forms of 3 He/ 4 He ratio and R/Ra ratio, where R is the 3 He/ 4 He ratio of the sample and Ra is that of air. The blank level of 4 He is 2 × 11 −11 cm 3 STP and the blanking 3 He/ 4 He ratio is 1 × 10 −6 (Li et al , 2002). The analytical precision of the standard gas is 1% and that of samples is included in Table 3.…”

Section: Isotope Geochemistrymentioning

confidence: 99%

Geology and Geochemistry of the Buerkesidai and Kuoerzhenkuola Gold Deposits in the Sawuershan Region, Xinjiang Uigur Autonomous Region, Northwest China

Zeng

Liu

et al. 2007

Resource Geology

View full text Add to dashboard Cite

The Sawuershan region, one of the important gold metallogenic belts of Xinjiang, is located in the western part of the Kalatongke island arc zone of north Xinjiang, NW China. There are two gold deposits in mining, namely the Kuoerzhenkuola and the Buerkesidai deposits. Gold ores at the Kuoerzhenkuola deposit occur within Carboniferous andesite and volcanic breccias in the form of gold-bearing quartz -pyrite veins and veinlet groups containing native gold, electrum, pyrite, pyrrhotite and chalcopyrite. Gold ores at the Buerkesidai deposit occur within Carboniferous tuffaceous siltstones in the form of gold-bearing quartz veinlet groups and altered rocks, with electrum, pyrite and arsenopyrite as major metallic minerals. Both gold deposits are hosted by structurally controlled faults associated with intense hydrothermal alteration. The typical alteration assemblage is sericite + chlorite + calcite + quartz, with an inner pyrite -sericite zone and an outer chloritecalcite -epidote zone between orebodies and wall rocks. 72 -18.56, 15.34 -15.61, and 37.21 -38.28, respectively. These sulfur and lead isotope compositions imply that ore-forming materials might originate from multiple, mainly deep sources. He and Ar isotope study on fl uid inclusions of pyrites from ores of Kuoerzhenkuola and Buerkesidai gold deposits produces 40 Ar/ 36 Ar and 3 He/ 4 He ratios in the range of 282 -525 and 0.6 -9.4 R/Ra, respectively, indicating a mixed source of deep-seated magmatic water (mantle fl uid) and shallower meteoric water. In terms of tectonic setting, the gold deposits in the Sawuershan region can be interpreted as epithermal. These formations resulted from a combination of protracted volcanic activity, hydrothermal fl uid mixing, and a structural setting favoring gold deposition. Fluid mixing was possibly the key factor resulting in Au deposition in the gold deposits in Sawuershan region.

show abstract

Geochemical evaluation of cosmic spherules collected from the Central Indian Ocean Basin

Pandey,

Rudraswami,

Singh

et al. 2023

Deep Sea Research Part I: Oceanographic Research Papers

View full text Add to dashboard Cite

Extraterrestrial3 He in marine polymetallic nodules: A potential method for measuring growth rate of nodules

Cited by 4 publications

References 10 publications

Helium and Argon Isotopes in the Fe-Mn Polymetallic Crusts and Nodules from the South China Sea: Constraints on Their Genetic Sources and Origins

Helium and Argon Isotopes in the Fe-Mn Polymetallic Crusts and Nodules from the South China Sea: Constraints on Their Genetic Sources and Origins

Geology and Geochemistry of the Buerkesidai and Kuoerzhenkuola Gold Deposits in the Sawuershan Region, Xinjiang Uigur Autonomous Region, Northwest China

Geochemical evaluation of cosmic spherules collected from the Central Indian Ocean Basin

Contact Info

Product

Resources

About