English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Oxygen isotope compositions of the interstitial waters have been measured for 21 samples taken from the depth intervals of 1.5 to 398.9 mbsf at Site 798 (Oki Ridge) and 16.5 to 435.6 mbsf at Site 799 (Kita-Yamato Trough) in Japan Sea. The δ 18 θ values decrease with depth from -0.49 to -3.38 o/oo (SMOW) at Site 798 and from -0.71 to -4.36 o/oo (SMOW) at Site 799 corresponding to an average depletion gradient of-0.8 o/ooper 100 m. Material balance calculations reveal that the δ18θ-variations at Sites 798 and 799 were principally controlled by low-temperature alteration of basement basalt and andesite, resulting in negative shifts in pore water δ 18 O values, and by the polymorphic transformations of biogenic opal-A to opal-CT and opal-CT to microquartz, which tend to increase δ 18 θ of interstitial waters. Carbonate diagenesis and ash alteration also caused weakly negative shifts in pore water δ 18 θ values.

Causes of the Oxygen Isotopic Depletion of Interstitial Waters from Sites 798 and 799, Japan Sea, Leg 128