Thermal modelling of very long-lived (>140 Myr) high thermal gradient metamorphism as a result of radiogenic heating in the Reynolds Range, central Australia

Lithos ◽  
2020 ◽  
Vol 352-353 ◽  
pp. 105280
Author(s):  
Kiara L. Alessio ◽  
Martin Hand ◽  
Derrick Hasterok ◽  
Laura J. Morrissey ◽  
David E. Kelsey ◽  
...  
Keyword(s):  
Thermal Gradient ◽  
Thermal Modelling ◽  
Radiogenic Heating ◽  
High Thermal Gradient ◽  
Central Australia

Conductively driven, high-thermal gradient metamorphism in the Anmatjira Range, Arunta region, central Australia

2013 ◽  
Vol 31 (9) ◽  
pp. 1003-1026 ◽  
Author(s):  
J. R. Anderson ◽  
D. E. Kelsey ◽  
M. Hand ◽  
W. J. Collins
Keyword(s):  
Thermal Gradient ◽  
High Thermal Gradient ◽  
Central Australia

Metamorphism of the MacLean Lake and Central Metavolcanic belts, La Ronge domain, Trans-Hudson Orogen: pressure-temperature variations and tectonic implications

1998 ◽  
Vol 35 (8) ◽  
pp. 905-922 ◽  
Author(s):  
Haiming Yang ◽  
Kurt Kyser ◽  
Kevin Ansdell
Keyword(s):  
High Temperature ◽  
Thermal Gradient ◽  
Amphibolite Facies ◽  
Tectonic Zone ◽  
Thrust Sheet ◽  
Temperature Variations ◽  
High Thermal Gradient ◽  
Tectonic Implications ◽  
Peak Metamorphism ◽  
Peak Pressures

Metamorphic assemblages differ between the metasedimentary MacLean Lake belt and the adjacent Central Metavolcanic belt in the La Ronge domain, Trans-Hudson Orogen. The former consists of meta-arkoses, psammitic gneisses, metaconglomerates, and calc-silicate gneisses of upper amphibolite facies (600-740°C, 440-660 MPa) with local migmatization, whereas the latter is comprised mainly of metavolcanic and plutonic rocks, with minor metasedimentary schists of greenschist to lower amphibolite facies (480-630°C, 520-560 MPa). Petrographic evidence indicates that peak metamorphic conditions were reached towards the end of D1 deformation during which the Central Metavolcanic belt was thrust onto the MacLean Lake belt along the McLennan Lake tectonic zone, which separates the two belts. Peak metamorphic assemblages did not undergo retrograde alteration during D2 deformation, indicating that high temperature was maintained during D2 deformation. Differences in pressure (P) and temperature (T) between the northeastern and southwestern parts of the Central Metavolcanic belt may have resulted from tilting along strike after peak metamorphism. Peak temperatures increase gradually from the Central Metavolcanic belt to MacLean Lake belt across the McLennan Lake tectonic zone. Peak pressures in the two belts are similar, implying that the Central Metavolcanic belt thrust sheet was probably thin. The P-T data for the MacLean Lake belt indicate a relatively high thermal gradient (40-50°C/km), similar to that in the metasedimentary Kisseynew domain in the orogen.

Experimental Study of Thermomigration in Lead-Free Nanoelectronics Solder Joints

2006 ◽  
Author(s):  
Mohd F. Abdulhamid ◽  
Cemal Basaran ◽  
Douglas C. Hopkins
Keyword(s):  
Experimental Study ◽  
Intermetallic Compound ◽  
Thermal Gradient ◽  
Solder Joints ◽  
Lead Free ◽  
Cold Side ◽  
High Thermal Gradient

The study of thermomigration on Sn-Ag-Cu solder sphere subjected to a high thermal gradient of 1100°C/cm is presented. After 286 hours, the hot end showed a thin and flat intermetallic compound (IMC) while the cold side showed a scallop-like Cu6Sn5 IMC. Small voids can be seen within the Cu6Sn5 IMC after 712 hours on the cold side, while the IMC on the opposite side showed no observable changes.

scholarly journals High Thermal Gradient in Thermo-electrochemical Cells by Insertion of a Poly(Vinylidene Fluoride) Membrane

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Syed Waqar Hasan ◽  
Suhana Mohd Said ◽  
Mohd Faizul Mohd Sabri ◽  
Ahmad Shuhaimi Abu Bakar ◽  
Nur Awanis Hashim ◽  
...  
Keyword(s):  
Thermal Gradient ◽  
Vinylidene Fluoride ◽  
Electrochemical Cells ◽  
High Thermal Gradient ◽  
Poly Vinylidene Fluoride

The Disappointment Hill complex: Proterozoic granulites in southwestern Newfoundland

1991 ◽  
Vol 82 (1) ◽  
pp. 55-63 ◽  
Author(s):  
J. V. Owen ◽  
K. L. Currie
Keyword(s):  
Heat Source ◽  
Long Range ◽  
Thermal Gradient ◽  
Granulite Facies ◽  
Metamorphic Grade ◽  
Structural Level ◽  
Structural Position ◽  
Cape Breton Island ◽  
Cape Breton ◽  
High Thermal Gradient

ABSTRACTThe Steel Mountain terrane of the southern Long Range Mountains forms a fault-bounded massif of (meta)plutonic rocks including the Disappointment Hill complex (DHC), a sequence of granulite-facies lithologies containing charnockite emplaced at 1498 Ma (U-Pb, zircon). Quartzofeldspathic gneiss of the DHC contains garnet + biotite + orthopyroxene ± cordierite assemblages indicative of metamorphic P–T conditions of ca 750°C and 400 MPa. The relatively high thermal gradient (ca 70°C km−1) inferred for the DHC is attributed to a magmatic heat source.On grounds of lithology, age and metamorphic grade, the DHC correlates to granulites of the Long Range Inlier (LRI) exposed farther north. Both complexes occur in blocks thrust westward over Taconic allochthons capped by ophiolite nappes. The block containing the DHC, however, preserves younger cover rocks, suggesting that it originated at a higher structural level than the LRI. This model is supported by lower pressure estimates for the DHC relative to the LRI (400 MPa vs 500–800 MPa). The DHC forms a link between Grenvillian rocks of the northern Long Range of Newfoundland and those of Cape Breton Island. The structural position of these massifs suggests that their emplacement was a post-Taconic event.

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