“The “plate” model for the genesis of melting anomalies”
... It is common to hear, when debates are held regarding the origin of melting anomalies, “But what alternatives are there to the plume hypothesis?” This question may even be posed immediately after alternatives have just been described. The objective of this article is to lay out the alternative known ...
... It is common to hear, when debates are held regarding the origin of melting anomalies, “But what alternatives are there to the plume hypothesis?” This question may even be posed immediately after alternatives have just been described. The objective of this article is to lay out the alternative known ...
Late Palaeozoic lam pro phyres and as so ci ated mafic subvolcanic
... the crystalline basement and, locally, the overlying molasse deposits. The dyke swarms are adjacent to major regional dislocations, represent distinctive magmatic centres that are related to separate magmatic systems and each are characterized by specific parental melts that have undergone individua ...
... the crystalline basement and, locally, the overlying molasse deposits. The dyke swarms are adjacent to major regional dislocations, represent distinctive magmatic centres that are related to separate magmatic systems and each are characterized by specific parental melts that have undergone individua ...
The Architecture, Chemistry, and Evolution of - Cin
... of basalts (Gaetani & Grove 1998). Most igneous rocks formed above subduction zones contain significant amounts of volatiles (H2 O, CO2 ), have a large range of silica contents (Figure 2a), are calc-alkaline (Figure 2b), and have distinctive trace elemental patterns as compared with rocks from other ...
... of basalts (Gaetani & Grove 1998). Most igneous rocks formed above subduction zones contain significant amounts of volatiles (H2 O, CO2 ), have a large range of silica contents (Figure 2a), are calc-alkaline (Figure 2b), and have distinctive trace elemental patterns as compared with rocks from other ...
Moores and Twiss chapter 5
... As mentioned above, the main rift system has several subsidiary branches that are connected to the main system at triple junctions. These brancheswhich include the Galapagos Rise, the South Chile Rise (Fig. 5.2, diagram 8), the Carlsberg Ridge, the Red Sea Rift, and the Azores Rift--display topograp ...
... As mentioned above, the main rift system has several subsidiary branches that are connected to the main system at triple junctions. These brancheswhich include the Galapagos Rise, the South Chile Rise (Fig. 5.2, diagram 8), the Carlsberg Ridge, the Red Sea Rift, and the Azores Rift--display topograp ...
Subduction of oceanic lithosphere
... Detailed cartoon of the mantle wedge (region of detail depicted by shading in Figure 11), showing how fluids might move from the subducted slab into a region where melts could be generated (modified after Davies and Stevenson [1992] and Stern [1998]). Water is carried in the descending slab (A), and ...
... Detailed cartoon of the mantle wedge (region of detail depicted by shading in Figure 11), showing how fluids might move from the subducted slab into a region where melts could be generated (modified after Davies and Stevenson [1992] and Stern [1998]). Water is carried in the descending slab (A), and ...
Final Exam Study Guide File
... 54. Which of the following metamorphic rocks has a nonfoliated texture? a. slate c. marble b. gneiss d. schist REF: p. 83 OBJ: 3.14 Recognize foliated metamorphic rocks and describe how they form. MSC: application 55. Which of the following results when divergence occurs between two oceanic plates? ...
... 54. Which of the following metamorphic rocks has a nonfoliated texture? a. slate c. marble b. gneiss d. schist REF: p. 83 OBJ: 3.14 Recognize foliated metamorphic rocks and describe how they form. MSC: application 55. Which of the following results when divergence occurs between two oceanic plates? ...
Elevated 87Sr/86Sr Ratios From Mafic Intrusions in the Atlanta Lobe
... plutons show deeper levels of exposure than do plutons from the better studied Sierran Nevada batholith. Additional work on the border zone rocks of the Atlanta lobe includes regional summaries and reconnaissance studies by Anderson (1952), Larsen and Schmidt (1958), Schmidt (1964), Taubeneck (1971) ...
... plutons show deeper levels of exposure than do plutons from the better studied Sierran Nevada batholith. Additional work on the border zone rocks of the Atlanta lobe includes regional summaries and reconnaissance studies by Anderson (1952), Larsen and Schmidt (1958), Schmidt (1964), Taubeneck (1971) ...
Human Health and Vulnerability in the Nyiragongo Volcano Crisis
... people’s lives. Often concealed by cloud, Nyiragongo has been reluctant to yield its secrets. The earliest European explorers were drawn to the red glow of its crater against the night sky, and an expedition eventually forged a way through almost impenetrable vegetation to reach the summit in 1894. ...
... people’s lives. Often concealed by cloud, Nyiragongo has been reluctant to yield its secrets. The earliest European explorers were drawn to the red glow of its crater against the night sky, and an expedition eventually forged a way through almost impenetrable vegetation to reach the summit in 1894. ...
Plate Tectonics
... 1. Conduction: Heat is transferred through rapid collisions of atoms, which can only happen if the material is solid. Heat flows from warmer to cooler places until all are the same temperature. The mantle is hot mostly because of heat conducted from the core. 2. Convection: If a material is able to ...
... 1. Conduction: Heat is transferred through rapid collisions of atoms, which can only happen if the material is solid. Heat flows from warmer to cooler places until all are the same temperature. The mantle is hot mostly because of heat conducted from the core. 2. Convection: If a material is able to ...
Nature: Friend or Foe w/HMR theme 6
... 13.5.2 Investigate and describe various meteorological phenomena (e.g., flooding, thunderstorms, and drought). 13.5.3 Investigate and describe the factors which affect the processes such as evaporation and condensation. 13.5.5 Investigate and describe how change is an ongoing process that can be see ...
... 13.5.2 Investigate and describe various meteorological phenomena (e.g., flooding, thunderstorms, and drought). 13.5.3 Investigate and describe the factors which affect the processes such as evaporation and condensation. 13.5.5 Investigate and describe how change is an ongoing process that can be see ...
IODP Proposal Cover Sheet
... related volcanic series is positively correlated with depth (h) to the Wadati-Benioff Zone. Thus geochemical asymmetry in arcs was known prior to the advent of plate tectonics and may be what makes juvenile arc crust “continental” in key elements like Th and LREE as well as intermediate in silica co ...
... related volcanic series is positively correlated with depth (h) to the Wadati-Benioff Zone. Thus geochemical asymmetry in arcs was known prior to the advent of plate tectonics and may be what makes juvenile arc crust “continental” in key elements like Th and LREE as well as intermediate in silica co ...
Drilling at sea: Hydrocarbon Exploration
... There are many examples of Stage 1. East African Rift Valley is the classic example. But also the Midland Valley of Scotland, the Rhine Graben, the Oslo Graben. These rifts have never got beyond stage 1. Commonly the volcanism associated with these rifts is highly alkaline and undersaturated in sili ...
... There are many examples of Stage 1. East African Rift Valley is the classic example. But also the Midland Valley of Scotland, the Rhine Graben, the Oslo Graben. These rifts have never got beyond stage 1. Commonly the volcanism associated with these rifts is highly alkaline and undersaturated in sili ...
Tectonic–climatic interaction
Tectonic–climatic interaction is the interrelationship between tectonic processes and the climate system. The tectonic processes in question include orogenesis, volcanism, and erosion, while relevant climatic processes include atmospheric circulation, orographic lift, monsoon circulation and the rain shadow effect. As the geological record of past climate changes over millions of years is sparse and poorly resolved, many questions remain unresolved regarding the nature of tectonic-climate interaction, although it is an area of active research by geologists and palaeoclimatologists.