The origin of symmetric alternating magnetic polarity stripes on the seafloor is investigated in two marine environments; along the ridge axis of the fast ... CM Williams - Massachusetts Institute of Technology 被引量: 22发表: 2007年 Vector magnetic analysis within the southern Ayu Trough, equatori...
The most widely known example of the utility of the field is its role in deciphering the process of seafloor spreading through the recognition of alternately normally and reversely magnetized rock stripes on the ocean floor (see Magnetic anomalies, marine ; Magnetic anomalies for geology and ...
The most widely known example of the utility of the field is its role in deciphering the process of seafloor spreading through the recognition of alternately normally and reversely magnetized rock stripes on the ocean floor (see Magnetic anomalies, marine ; Magnetic anomalies for geology and ...
Combined analyses of deep tow magnetic anomalies and International Ocean Discovery Program Expedition 349 cores show that initial seafloor spreading started around 33 Ma in the northeastern South China Sea (SCS), but varied slightly by 1–2 Myr along the northern continent-ocean boundary (COB). A...
Since the Earth’s field changes polarity almost every million years, the ocean floor is magnetized with alternating polarity (north-seeking versus south-seeking magnetism) about every kilometer or so, in stripes parallel to the MOR. The stripes are neither as sharp nor as closely spaced as one...
combined with legacy information from a forerunner satellite called Champ. Variations as small as 250km across are detectable. Clearly seen are the "stripes" of magnetism moving away from mid-ocean ridges - the places on the planet where new crust is constantly produced. This pattern - the cons...
One example of how magnetic anomalies can give insight into the evolution of Earth's crust are seafloor stripes (seen above). These formations were a foundational piece of evidence in support of the plate tectonic theory. By noting the symmetry of the stripes on either side of oceanic spreading...
the mechanism of expansion for the entire South China Sea basin.This study attempts to constrain these problems from a comprehensive analysis of the seafloor topography,magnetic anomaly stripes,regional aeromagnetic data,satellite gravity,and submarine geothermics.The mapped seafloor terrain shows that the...
Magnetic anomaly data provide a unique perspective on geologic processes as evident from the well known example of magnetic stripes associated with the seafloor spreading鈥攁 process that could not be inferred readily through other geophysical quantities. Similarly, information on bulk geologic variations ...
The Eastern Algerian basin (EAB) occupies a key position at the eastern tip of the Western Mediterranean. Although clear triangular-shaped magnetic anomalies (MA) are well identified since long, the way seafloor spreading occurred during the middle Miocene is still debated. In this work, a new...