The proposed program is aware of Legs 59 and 60 to be drilled 

 in eariy 1978 (fig. 38). Standard geophysical measurements, 

 geological sampling, and magnetotelluric measurements will be 

 made. An extensive array of ocean-bottom and land-based seis- 



mometers will be deployed. In addition to recording the seis- 

 micity of the area, explosive charges will be used to obtain 

 precise velocity data. 



The Mariana-Philippine Transect is the fifth of the six tran- 



Table 13. — U.S. institutions, investigators, and projects in SEATAR 



Institutions 



Investigators 



Lamont-Doherty Geological Observatory D. E. Hayes 



University of California, San Diego, 

 Scripps Institution of Oceanography 



Cornell University 



University of Hawaii, 



Hawaii Institute of Geophysics 



University of Texas, Galveston, 



Marine Science Institute 



University of California, Santa Barbara 



University of Arizona 



Colorado School of Mines 



R. Anderson, 

 E. Bonatti, and 

 J. Lawrence 

 E. Bonatti 

 J. W. Hawkins 



G. G. Shor, Jr. 



J. Curray 



J.H. Filloux 



L. Dorman 



J. Mammerickx 

 D. E. Karig 



B. Isacks 



R.Kay 



D. Hussong 

 G. Latham 

 M. Reichle 

 A. Meijer 



A. Divis 



Projects 



Woods Hole Oceanographic Institution C. 0. Bowin 



S. E. Asia Marine Geology and Geophysics Pro- 

 gram 



Steering Committee Support 

 The Parece Vela and West Philippine Basin 

 Studies 



Program Coordination 



Heat Flow, Metallogenesis, and Sea Water Con- 

 vection in the Oceanic Crust 



Philippine Ophiolites 



Evolution of Oceanic Crust Geochemical and 

 Petrological Studies, Mariana Trough and N. Luzon 

 Trench 



Seismic Refraction Studies of the Mariana Arc and 

 Trench 



Seismic Refraction Banda Arc 

 Marine Geology and Geophysics of the Sunda Arc 

 Marine Geology and Geophysics of the Andaman 

 Sea 



Magnetotelluric Traverse Across-Mariana Trench, 

 Arc, and Trough 



Seismicity and Seismic Refraction of the Mariana 

 Trough and Arc-Trench Areas 

 Bathymetry of East Asian Seas 

 Characteristics and Evolution of Back-arc spread- 

 ing in the Mariana Trough. 

 Nias/Sunda Transect 



Seismological Studies of the SEATAR Area (Banda, 

 Sunda, and the Philippine Sea Plate). 

 Operation of Temporary Seismograph Network on 

 the Mariana Islands 



Magma Genesis in Back Arc Basins (dredged and 

 drilled rocks from Mariana Trough) 

 Distribution of Earthquakes, Epicenters, and some 

 Focal Mechanisms in Diverging Basins 

 Ocean Bottom Seismometer Observation, Mariana 

 Transect 



Seismicity and Seismic Refraction of the Mariana 

 Trough and Arc Trench Areas 

 Geochemical, Petrologic (Pb and Strontium Iso- 

 topes) Studies of Volcanic Islands, Dredge Samples 

 from Mariana Back-arc Basins 

 Magmatic Processes in Evolution of Arc Copper- 

 Molybdenum Deposits 

 Banda Arc Geophysical Studies 



62 



