Leg 195 Summary

Salisbury, M.H.; Shinohara, M.; Richter, C.

doi:10.2973/odp.proc.ir.195.101.2002

Cited by 8 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous drilling during Ocean Drilling Program Legs 125 and195 (Shipboard Scientific Party, 1990, 2002) sampled the mud volcanoes (South Chamorro and Conical Seamounts) farthest from the trench at 78 and 86 km, which represent deeper, warmer conditions in the subducting plate (Shipboard Scientific Party, 1990, 2002. Expedition 366 focused on three serpentinite mud volcanoes (Yinazao, Fantangisña, and Asùt Tesoru Seamounts; Figure F1) located 55, 62, and 72 km from the trench, respectively, giving a broader sampling of depth and temperature conditions along the plate boundary (see the Expedition 366 summary chapter [Fryer et al, 2018b]).…”

Section: Introductionmentioning

confidence: 99%

Data report: permeability, porosity, and frictional strength of core samples from IODP Expedition 366 in the Mariana forearc

Morrow¹,

Moore²,

Lockner³

et al. 2019

Proceedings of the International Ocean Discovery Program

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Data report: permeability, porosity, and frictional strength of core samples from IODP Expedition 366 in the Mariana forearc

Morrow¹,

Moore²,

Lockner³

et al. 2019

Proceedings of the International Ocean Discovery Program

View full text Add to dashboard Cite

show abstract

The North Pacific Acoustic Laboratory deep-water acoustic propagation experiments in the Philippine Sea

Worcester

Dzieciuch

Mercer

et al. 2013

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

The experimental goals included (a) understanding the impacts of fronts, eddies, and internal tides on acoustic propagation, (b) determining whether acoustic methods, together with other measurements and ocean modeling, can yield estimates of the time-evolving ocean state useful for making improved acoustic predictions, (c) improving our understanding of the physics of scattering by internal waves and spice, (d) characterizing the depth dependence and temporal variability of ambient noise, and (e) understanding the relationship between the acoustic field in the water column and the seismic field in the seafloor. In these experiments, moored and ship-suspended low-frequency acoustic sources transmitted to a newly developed distributed vertical line array receiver capable of spanning the water column in the deep ocean. The acoustic transmissions and ambient noise were also recorded by a towed hydrophone array, by acoustic Seagliders, and by ocean bottom seismometers.

show abstract

Characteristic thermal regimes of plate tectonics and their metamorphic imprint throughout Earth history: When did Earth first adopt a plate tectonics mode of behavior

Brown¹

2008

Special Paper 440: When Did Plate Tectonics Begin on Planet Earth?

View full text Add to dashboard Cite

Where plates converge, one-sided subduction generates two contrasting thermal environments in the subduction zone (low dT/dP) and in the arc and subduction zone backarc or orogenic hinterland (high dT/dP). This duality of thermal regimes is the hallmark of modern plate tectonics, which is imprinted in the ancient rock record as penecontemporaneous metamorphic belts of two contrasting types, one characterized by higher-pressure-lower-temperature metamorphism and the other characterized by higher-temperature-lower-pressure metamorphism. Granulite facies ultrahigh-temperature metamorphism (G-UHTM) is documented in the rock record predominantly from the Neoarchean to the Cambrian, although it may be inferred at depth in some younger Phanerozoic orogenic systems. Medium-temperature eclogite-high-pressure granulite metamorphism (E-HPGM) also is fi rst recognized in the Neoarchean, although well-characterized examples are rare in the Neoarchean-to-Paleoproterozoic transition, and occurs at intervals throughout the Proterozoic and Paleozoic rock record. The fi rst appearance of E-HPGM belts in the rock record registers a change in geodynamics that generated sites of lower heat fl ow than previously seen, inferred to be associated with subduction-to-collision orogenesis. The appearance of coeval G-UHTM belts in the rock record registers contemporary sites of high heat fl ow, inferred to be similar to modern arcs, abd backarcs, or orogenic hinterlands, where more extreme temperatures were imposed on crustal rocks than previously recorded. Blueschists fi rst became evident in the Neoproterozoic rock record, and lawsonite blueschists, low-temperature eclogites (high-pressure metamorphism, HPM), and ultrahigh-pressure metamorphism (UHPM) characterized by coesite or diamond are predominantly Phanerozoic phenomena. HPM-UHPM registers low to intermediate apparent thermal gradients typically associated with modern subduction zones and the eduction of deeply subducted lithosphere, including the eduction of continental crust subducted during the early stage of the collision process in subduction-to-collision orogenesis. During the Phanerozoic, most UHPM belts have developed by closure of relatively short-lived ocean basins that opened due to rearrangement of the continental lithosphere within a continent-dominated hemisphere as Eurasia was formed from Rodinian orphans and joined with Gondwana in Pangea,

show abstract

Leg 195 Summary

Cited by 8 publications

References 0 publications

Data report: permeability, porosity, and frictional strength of core samples from IODP Expedition 366 in the Mariana forearc

Data report: permeability, porosity, and frictional strength of core samples from IODP Expedition 366 in the Mariana forearc

The North Pacific Acoustic Laboratory deep-water acoustic propagation experiments in the Philippine Sea

Characteristic thermal regimes of plate tectonics and their metamorphic imprint throughout Earth history: When did Earth first adopt a plate tectonics mode of behavior

Contact Info

Product

Resources

About