Structure and evolution of the Molucca Sea area: constraints based on interpretation of a combined sea-surface and satellite gravity dataset

Widiwijayanti, Christina; Михайлов, В. О.; Diament, M.; Deplus, Christine; Louat, Rémy; Tikhotsky, S. A.; Гвишиани, А. Д.

doi:10.1016/s0012-821x(03)00416-3

Cited by 30 publications

(19 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“… 16 ) arcs where 15 N depleted signatures have been documented. The bathymetry of the Molucca sea floor in front of the Sangihe arc is not as smooth as nearby Celebes sea and Philippine sea plates due to the central ridge 56 . Also, the bathymetric map of the northwest Pacific 57 shows that the ocean floor is rough with numerous seamounts in front of the Mariana subduction zone.…”

Section: Discussionmentioning

confidence: 83%

Nitrogen recycling at the Costa Rican subduction zone: The role of incoming plate structure

Lee

Fischer

Moor

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Efficient recycling of subducted sedimentary nitrogen (N) back to the atmosphere through arc volcanism has been advocated for the Central America margin while at other locations mass balance considerations and N contents of high pressure metamorphic rocks imply massive addition of subducted N to the mantle and past the zones of arc magma generation. Here, we report new results of N isotope compositions with gas chemistry and noble gas compositions of forearc and arc front springs in Costa Rica to show that the structure of the incoming plate has a profound effect on the extent of N subduction into the mantle. N isotope compositions of emitted arc gases (9–11 N°) imply less subducted pelagic sediment contribution compared to farther north. The N isotope compositions (δ15N = −4.4 to 1.6‰) of forearc springs at 9–11 N° are consistent with previously reported values in volcanic centers (δ15N = −3.0 to 1.9‰). We advocate that subduction erosion enhanced by abundant seamount subduction at 9–11 N° introduces overlying forearc crustal materials into the Costa Rican subduction zone, releasing fluids with lighter N isotope signatures. This process supports the recycling of heavier N into the deep mantle in this section of the Central America margin.

show abstract

Section: Discussionmentioning

confidence: 83%

Nitrogen recycling at the Costa Rican subduction zone: The role of incoming plate structure

Lee

Fischer

Moor

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Whereas the southern portion of the arc ends at the left‐lateral Sorong Fault (Figure 1a), the northern termination is marked by the collision of eastern and western Mindanao about 4–5 Ma ago [ Pubellier et al , 1991]. The present‐day active arc ceases at ∼4°N; however, the extinct margin extends to 5.5°N [ Lallemand et al , 1998; Widiwijayanti et al , 2003], with lavas in central Mindanao thought to be of Sangihe origin [ Pubellier et al , 1991]. This northern collision region is further complicated by back‐arc thrusting along the Cotobato Trench in the west and the Philippine Trench in the east, leaving dissected remnants of the Sangihe (and Halmahera) arcs on Mindanao Island and the Talaud Ridge [ Morrice et al , 1983].…”

Section: Geological and Tectonic Backgroundmentioning

confidence: 99%

Tracing magma sources in an arc‐arc collision zone: Helium and carbon isotope and relative abundance systematics of the Sangihe Arc, Indonesia

Jaffe

Hilton

Fischer

et al. 2004

Geochem Geophys Geosyst

View full text Add to dashboard Cite

[1] The Sangihe Arc is presently colliding with the Halmahera Arc in northeastern Indonesia, forming the world's only extant example of an arc-arc collision zone. We report the first helium and carbon isotopic and relative abundance data from the Sangihe Arc volcanoes as a means to trace magma origins in this complicated tectonic region. Results of this study define a north-south trend in 3 He/ 4 He ($5.4 R A ) than the southernmost volcanoes (Ruang, Lokon, and Mahawu). Resolving the arc CO 2 into component structures (mantle-derived, plus slab-derived organic and carbonate CO 2 ), the northern volcanoes contain an unusually high (>90%) contribution of CO 2 derived from isotopically heavy carbonate associated with the subducting slab (sediment and altered oceanic basement). Furthermore, the overall slab contribution (CO 2 of carbonate and organic origin) relative to carbon of mantle wedge origin is significantly enhanced in the northern segment of the arc. These observations may be caused by greater volumes of sediment subduction in the northern arc, alongstrike variability in subducted sediment composition, or enhanced slab-derived fluid/melt production resulting from the superheating of the slab as collision progresses southward.

show abstract

“…The scale includes four grades: [-1; 0.4) is 'background'; [0.4; 0.55) is 'weak anomaly'; [0.55; 0.7) is ' anomaly'; [0.7; 1] is 'strong anomaly' (Soloviev, Agayan & Bogoutdinov 2016]. Spike and MA algorithms are based on discrete mathematical analysis (DMA) approach (Gvishiani et al 2013;Kulchinsky et al 2010;Mikhailov et al 2003;Soloviev et al 2012a;Soloviev et al 2012b;Soloviev et al 2013a;Widiwijayanti et al 2003;Zlotnicki et al 2005).…”

Section: Online Processing Of Geomagnetic Datamentioning

confidence: 99%

Automated Hardware and Software System for Monitoring the Earth’s Magnetic Environment

Гвишиани

Soloviev

Krasnoperov

et al. 2016

Data Science Journal

Self Cite

View full text Add to dashboard Cite

The continuous growth of geophysical observations requires adequate methods for their processing and analysis. This becomes one of the most important and widely discussed issues in the data science community. The system analysis methods and data mining techniques are able to sustain the solution of this problem. This paper presents an innovative holistic hardware/software system (HSS) developed for efficient management and intellectual analysis of geomagnetic data, registered by Russian geomagnetic observatories and international satellites. Geomagnetic observatories that comprise the International Real-time Magnetic Observatory Network (INTERMAGNET) produce preliminary (raw) and definitive (corrected) geomagnetic data of the highest quality. The designed system automates and accelerates routine production of definitive data from the preliminary magnetograms, obtained by Russian observatories, due to implemented algorithms that involve artificial intelligence elements. The HSS is the first system that provides sophisticated automatic detection and multi-criteria classification of extreme geomagnetic conditions, which may be hazardous for technological infrastructure and economic activity in Russia. It enables the online access to digital geomagnetic data, its processing results and modelling calculations along with their visualization on conventional and spherical screens. The concept of the presented system agrees with the accepted 'four Vs' paradigm of Big Data. The HSS can increase significantly the 'velocity' and 'veracity' features of the INTERMAGNET system. It also provides fusion of large sets of ground-based and satellite geomagnetic data, thus facilitating the 'volume' and 'variety' of handled data.

show abstract

Structure and evolution of the Molucca Sea area: constraints based on interpretation of a combined sea-surface and satellite gravity dataset

Cited by 30 publications

References 24 publications

Nitrogen recycling at the Costa Rican subduction zone: The role of incoming plate structure

Nitrogen recycling at the Costa Rican subduction zone: The role of incoming plate structure

Tracing magma sources in an arc‐arc collision zone: Helium and carbon isotope and relative abundance systematics of the Sangihe Arc, Indonesia

Automated Hardware and Software System for Monitoring the Earth’s Magnetic Environment

Contact Info

Product

Resources

About