10.1594/PANGAEA.820192
Sharas'kin, Anatoly Ya
Anatoly Ya
Sharas'kin
Petrography and geochemistry of basement rocks from five DSDP Leg 60 Sites
PANGAEA
1982
Drilling/drill rig
Leg60
Glomar Challenger
Deep Sea Drilling Project (DSDP)
1978-03-28T00:00:00/1978-04-25T00:00:00
en
Supplementary Publication Series of Datasets
10.2973/dsdp.proc.60.134.1982
10 datasets
application/zip
Creative Commons Attribution 3.0 Unported
Bulk chemistry and trace elements data were measured in 72 samples, selected from 5 basement sections, which have been recovered by Leg 60 drilling (Sites 453, 454, 456, 458, and 459). According to analytical results a metagabbro- metabasalt breccia, deposited about 5 Ma at the westernmost flank of the Mariana Trough (Site 453), was derived from an island arc source. Basalts from the Mariana Trough (Sites 454 and 456) are similar in many respects to midoceanic ridge basalts (MORB). Yet rocks of unusual geochemistry, reflecting the possible influence of arc volcanism, were found among the pillow lavas at the easternmost trough (Site 456). The acoustic basement in the Mariana fore-arc region was formed by submarine eruptions of arc tholeiites (Sites 458 and 459) and peculiar high-MgO andesites related to the boninite suite.
Supplement to: Sharas'kin, Anatoly Ya (1982): Petrography and geochemistry of basement rocks from five Leg 60 Sites. In: Hussong, DM; Uyeda, S; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 60, 647-656
143.6825
147.3015
17.8625
18.013
North Pacific/SEDIMENT POND
North Pacific/TRENCH