ZIRCONOLITE WITH SIGNIFICANT REEZrNb(Mn,Fe)O7 FROM A XENOLITH OF THE LAACHER SEE ERUPTIVE CENTER, EIFEL VOLCANIC REGION, GERMANY

2000 ◽  
Vol 38 (1) ◽  
pp. 57-65 ◽  
Author(s):  
G. Della Ventura ◽  
F. Bellatreccia ◽  
C. T. Williams
Keyword(s):  
Eruptive Center ◽  
Volcanic Region

scholarly journals The Nevados de Payachata volcanic region (18°S/69°W, N. Chile)

1988 ◽  
Vol 50 (5) ◽  
pp. 287-303 ◽  
Author(s):  
G. Wörner ◽  
R. S. Harmon ◽  
J. Davidson ◽  
S. Moorbath ◽  
D. L. Turner ◽  
...  
Keyword(s):  
Volcanic Region

2-D crustal Poisson’s ratio from seismic travel time inversion in Changbaishan Tianchi volcanic region

2005 ◽  
Vol 18 (3) ◽  
pp. 345-353 ◽  
Author(s):  
Zhi Liu ◽  
Xian-kang Zhang ◽  
Fu-yun Wang ◽  
Yong-hong Duan ◽  
Xiao-ling Lai
Keyword(s):  
Travel Time ◽  
Poisson’S Ratio ◽  
Poisson's Ratio ◽  
Time Inversion ◽  
Volcanic Region ◽  
Travel Time Inversion

Geodetic strain and the deformational history of the North Island of New Zealand during the late Cainozoic

1987 ◽  
Vol 321 (1557) ◽  
pp. 163-181 ◽  
Keyword(s):  
New Zealand ◽  
Subduction Zone ◽  
East Coast ◽  
Late Quaternary ◽  
Plate Boundary ◽  
Boundary Zone ◽  
Metamorphic Belt ◽  
Volcanic Region ◽  
The North ◽  
Plate Boundary Zone

The subduction zone under the east coast of the North Island of New Zealand comprises, from east to west, a frontal wedge, a fore-arc basin, uplifted basement forming the arc and the Central Volcanic Region. Reconstructions of the plate boundary zone for the Cainozoic from seafloor spreading data require the fore-arc basin to have rotated through 60° in the last 20 Ma which is confirmed by palaeomagnetic declination studies. Estimates of shear strain from geodetic data show that the fore-arc basin is rotating today and that it is under extension in the direction normal to the trend of the plate boundary zone. The extension is apparently achieved by normal faulting. Estimates of the amount of sediments accreted to the subduction zone exceed the volume of the frontal wedge: underplating by the excess sediments is suggested to be the cause of late Quaternary uplift of the fore-arc basin. Low-temperature—high-pressure metamorphism may therefore be occurring at depth on the east coast and high-temperature—low-pressure metamorphism is probable in the Central Volcanic Region. The North Island of New Zealand is therefore a likely setting for a paired metamorphic belt in the making.

scholarly journals Perception of Non-migrant Communities to Geo-hazard Threats in the Mount Cameroon Volcanic Region

2020 ◽  
pp. 70-83
Author(s):  
Sunday Shende Kometa ◽  
Kang Edwin Mua
Keyword(s):  
Sampling Technique ◽  
Community Safety ◽  
Government Officials ◽  
Cameroon Volcanic Line ◽  
Migrant Communities ◽  
Secondary Sources ◽  
Volcanic Region ◽  
Mount Cameroon ◽  
Traditional Authorities ◽  
Migrant Households

Whilst the issue of migration has received widespread and international debates on the geometric number of people displaced daily from one region to another, the environmental unfriendliness, socio-economic and political situations have been accused for the progressive migrant trend in most parts of the world. Bearing in mind these unprecedented situations, the tendency had always been the decision to migrate or stay to cope with adverse situation. It is against these mix feelings that the study investigates the perception of non-migrant communities to geo-hazard threats along the Mount Cameroon Volcanic Line (CVL). The study made use of both primary and secondary sources of data. Interviews were conducted with some traditional authorities, officials of the Limbe Botanic Garden, government officials and municipal authorities on the environmental impacts associated with the decision of the non-migrants in vulnerable zones. From the interview conducted a representative survey of households was then undertaken to gather the opinion of non-migrant households within the geo-hazard environment. This was aided by the use of some 120 questionnaires distributed to on-spot households exposed to geo-hazards within the Mount Cameroon mobile region. 120 questionnaires were administered and distributed to 5 sampled communities using random a sampling technique. The Mount Cameroon Volcanic Region alongside the location of communities were mapped out using ArcGIS. The Pearson Product Moment Correlation results revealed that communities have strong perception of geo-hazards despite the threats. About 80% of the communities perceived the occurrence of such hazards as mixed blessings especially the associated benefits from fertile volcanic and alluvial soils as well as floodwaters in depressions used for agricultural activities. The study further states that the myths of households to geohazard occurrence kills the science and technology as well as the resilient strategies to such geo-hazards. While the socio-cultural mechanism remains a winding driver of on-spot location in hazard-prone zones, the future of community safety should not undermine human knack responses to geo-hazards. The study recommends proper planning and adaptive measures along this volcanic line such that the traditional and cultural myths of the communities should be integrated with the modern and technological structures to resist or minimize the effects of nature on the non-migrant communities within the flanks of the Cameroon Volcanic Line.

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