Drilling the oceanic lower crust and mantle : a global strategy for exploring the deep oceanic crust and mantle in the 1990's
Workshop on Drilling the Oceanic Lower Crust and Mantle
MetadataShow full item record
This workshop was convened to follow up on the Second Conference on Scientific Ocean Drilling (COSOD II) to devise a specific plan for deep crustal and mantle drilling over the next decade. Since COSOD II, however, there have been several developments which have had major impact on planning for this drilling. These include new and evolving models for volcanic segmentation at ocean ridges, a growing appreciation that faulting and deformation are an integral feature of the ocean crust, and the recent successful drilling during Ocean Drilling Project Leg 118 into a tectonically exposed section of layer 3 at Site 735B at the Atlantis II Fracture Zone in the Indian Ocean. The community has come to realize that while obtaining complete penetration of the crust at a few sites remains a critical goal for ocean drilling, these will be inadequate to characterize a heterogeneous ocean crust. Thus, in order to evaluate fully crustal composition and structure, crustal drilling must include both an ongoing attempt to attain total crustal penetration, and a major program to drill offset partial sections of the deep layers of the crust and their critical contacts. Accordingly, this workshop has formulated a global strategy for using drilling to systematically study an ocean crust whose composition and structure is laterally variable and changes with spreading rate and tectonic setting.
Workshop on Drilling the Oceanic Lower Crust and Mantle, March 7-10, 1989
Suggested CitationTechnical Report: Workshop on Drilling the Oceanic Lower Crust and Mantle, "Drilling the oceanic lower crust and mantle : a global strategy for exploring the deep oceanic crust and mantle in the 1990's", 1989-03, DOI:10.1575/1912/6433, https://hdl.handle.net/1912/6433
Showing items related by title, author, creator and subject.
Lower crustal variability and the crust/mantle transition at the Atlantis Massif oceanic core complex Blackman, Donna K.; Collins, John A. (American Geophysical Union, 2010-12-18)Seismic refraction data provide new constraints on the structure of the lower oceanic crust and its variability across the Atlantis Massif oceanic core complex, ∼30°N on the Mid-Atlantic Ridge. A 40 km-long spreading-parallel ...
Swift, Stephen A.; Reichow, Marc; Tikku, Anahita; Tominaga, Masako; Gilbert, Lisa A. (American Geophysical Union, 2008-10-16)We examine shipboard physical property measurements, wireline logs, and vertical seismic profiles (VSP) from Ocean Drilling Program/Integrated Ocean Drilling Program Hole 1256D in 15 Ma ocean crust formed at superfast ...
Occurrence of felsic rocks in oceanic gabbros from IODP hole U1473A: Implications for evolved melt migration in the lower oceanic crust. Nguyen, Du Khac; Morishita, Tomoaki; Soda, Yusuke; Tamura, Akihiro; Ghosh, Biswajit; Harigane, Yumiko; France, Lydéric; Liu, Chuanzhou; Natland, James H.; Sanfilippo, Alessio; MacLeod, Christopher J.; Blum, Peter; Dick, Henry J. B. (2018-12-20)Felsic rocks are minor in abundance but occur ubiquitously in International Ocean Discovery Program Hole U1473A, Southwest Indian Ridge. The trace element abundances of high-Ti brown amphibole, plagioclase, and zircon in ...