Sergeev, K F; Krasnii, M L; Neverov, Yul; Ostapenko, V F (1983): Chemical composition and age of magmatic rocks from the underwater Hokkaido Rise [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.775946, Supplement to: Sergeev, KF et al. (1983): Composition of crystalline basement of the southwest end of the Zenkevich swell (Hokkaido uplift). Tikhookeanskaya Geologiya (Pacific Geology), 2(2), 3-8
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Abstract:
Geological and geophysical investigations carried out within the Hokkaido Rise showed that intrusives composing outcrops of the crystalline basement on the ocean floor form a continuous series from monzonites and diorite-monzonites to granites with prevalence of granodiorites with stable mineralogical association: biotite - hornblende - K-feldspar. Acidic volcanic rocks are characterized by a similar mineralogical association with almost complete absence of plagioclase-pyroxene species. It seems that the Hokkaido Rise, as well as the marginal oceanic Zenkevich swell as a whole are not primary oceanic structural formations and have undergone a complex and long history of geological development with intense orogenic movements that occurred in Middle Cretaceous and preceded subalkaline basalt outpouring during postorogenic subsidence of the Earth crust.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 41.835000 * Median Longitude: 148.460000 * South-bound Latitude: 40.830000 * West-bound Longitude: 147.830000 * North-bound Latitude: 42.170000 * East-bound Longitude: 150.350000
Event(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Sergeev, KF; Krasnii, ML; Neverov, Y et al. (1983): (Table 1) Chemical composition of magmatic rocks from the underwater Hokkaido Rise. https://doi.org/10.1594/PANGAEA.775943
- Sergeev, KF; Krasnii, ML; Neverov, Y et al. (1983): (Table 2) Age of rocks from the underwater Zenkevich Swell. https://doi.org/10.1594/PANGAEA.775945