In the normal state of the high temperature superconductors Bi(2)Sr(2)CaCu(2)O(8+delta) and La2(-x)Sr(x)CuO4, and in the related "stripe ordered" material, La(1.25)Nd(0.6)Sr(0.15)CuO4, there is sharp structure in the measured single hole spectral function, A<(k-->,omega), considered as a function of k--> at fixed small binding energy omega. At the same time, as a function of omega at fixed k-->...

We present in situ major element, trace and Sr–Nd isotope data of apatite from an alkaline–carbonatite intrusion the South Qinling Belt (SQB) to investigate their magma evolution mantle sources. The Shaxiongdong (SXD) complex consists predominantly early Paleozoic hornblendite, nepheline syenite, subordinate Triassic carbonatite. Apatites all lithologies are euhedral subhedral belong fluorapati...

Mesozoic granitic plutons are found throughout the Indochina terrane of eastern Cambodia and southern Vietnam. The rocks range in age from Early Triassic (240 Ma) to Late Cretaceous (80 record distinct tectonomagmatic periods associated with subduction Paleotethys Paleo-Pacific oceans. Samples collected Snoul pluton, composed silicic intermediate dioritic rocks, basalt. quartz diorites magnesia...

• Record of adakitic high-Mg# magmatism along Hunter Ridge and Kadavu Island. records limited contribution from subducted sediments. Sr-Nd-Pb arc rocks record the melting subducting South Fiji MORB crust. This slab-melt component is also recorded in common (non-adakitic) rocks. Dehydration serpentinites leads to flux-melting unaltered MORB. The mostly submarine Ridge, located SW Pacific a ∼12 M...

tourmalinization characterizes the most pervasive alteration type in the nezam abad ore deposit, west-central iran. it delineates high-temperature centers of mineralization and together with quartz and cassiterite form inner parts of the alteration halo. the composition of tourmalines plots mostly along and between the proton and alkali-deficient end members. tourmaline in quartzdioritic host i...

In our previous study on petrogenesis of quartz syenite and granite porphyry, the host rocks Late Mesozoic Shapinggou Mo deposit in Qinling–Dabie orogenic belt, we found that initial Sr isotopic composition is strongly affected by degree K-alteration. Here, provide further evidence their minerals to investigate geochemical behaviour trace elements isotopes during alteration explain phenomenon d...

Low-temperature hydrothermal systems are generally dominated by Fe–Si oxyhydroxide deposits. However, the formation process and mechanism of modern oxyhydroxides at ultra-slow spreading centers remain poorly understood. This study focused on six deposits collected from different sites a typical center, Southwest Indian Ridge (SWIR). The mineralogical geochemical evidence showed significant char...