Peraluminous granites of various ages in southwestern North America are distinctly different. They rarely contain cordierite (a mineral characteristic of LFB S-types), but …
— The NQT is subdivided into three units that are separated by ductile shear zones and thrust faults. From north to south, these units are the Kuanping, Erlangping, and Qinling groups (e.g., Dong et al., 2011; Ratschbacher et al., 2003).The Kuanping Group forms the northernmost part of the NQT and is separated from the Erlangping Group to …
— Feature papers represent the most advanced research with significant potential for high impact in the field. A Feature Paper should be a substantial original Article that involves several techniques or approaches, provides an outlook for future research directions and describes possible research applications.
— type. The I-type granites are characterised by medium- to high-K calc-alkaline metaluminous-weak peraluminous, and have biotite/amphibole as the main mafic minerals. They are derived from the partial melting of meta-igneous rocks (Chappell and White, 1992). Recent studies show that the formation mechanisms of I-type granites differ in
DOI: 10.1016/j.oregeorev.2023.105487 Corpus ID: 258602451; Contrasting Nb-Ta mineralization between the Mufushan and Lianyunshan granites, South China: Evidence from whole-rock and zircon geochemistry and geochronology
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— The Um Ara area, in the south Eastern Desert of Egypt contains a number of uranium occurrences related to granitic rocks. U-rich thorite, thorite and zircon are the main primary uranium- and thorium-bearing minerals found in mineralized zones of the Um Ara alkali-feldspar granites; uranophane is the most common secondary uranium mineral. U …
— In this paper, we present new zircon U-Pb dating and Hf isotopic analytical results as well as whole-rock geochemical data of the early Paleozoic Jinxi granites in …
— These features indicate genesis via reworking of the lower crust beneath North China and partial involvement of juvenile crustal material to different extents. Occurrences of ca. 1000-Ma-old inherited zircon in the Lantian granites imply the contribution of the Qinling Group in North Qinling to the magma source(s). This …
— Thermobarometry using the mineral assemblage (Cpx-Amp–Pl–Bt–Qtz) from a metamafic xenolith result in a peak P-T estimate of 10 ± 1 kb and 850 ± 50 °C. This is …
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— Papers in this volume report progresses in mineralogical, petrological, geochronological and geochemical studies of granites and related rocks, with tectonic …
— Besides, the metasedimentary sequence associated with the S-type granites in the North Qinling unit contains abundant hydrous minerals such as biotite and …
— The granites deriving from muscovite breakdown have low TiO 2 contents (< 0.1%) (Visonà and Lombardo, 2002), being contrast with the high TiO 2 contents (up to 0.68%) of the Jinxi granites. The peritectic minerals produced in muscovite and biotite partial melting are also different (Weinberg and Hasalová, 2015). Garnet is the typical ...
— minerals that are present as minor constituents in rare-metal granites (RMG) and granitic rare-element pegmatites (REP). Significant potential exists as a by-product …
— The relationship between the mechanical properties and petrographic features of granites from the Utla area, north-west Pakistan, was studied. Three different textural varieties of granites (megacrystic coarse-grained, fine-grained and foliated coarse-grained) were collected. Following a comprehensive petrographic analysis, their uniaxial …
Undeformed, coarse-grained, slightly porphyritic, locally xenolith- bearing pink granites, prominently ex- posed at Gebel Sabrayn, form the centre of the structure.
The syenite is hypersolvus and contains a ferro-richteritic amphibole as the dominant femic mineral, whereas the most evolved granite is subsolvus and contains annite as the dominant femic mineral. ... ABSTRACT The Dutsen Wai and Ropp complexes are parts of the over 50 within-plate alkaline ring complexes in north-central Nigeria. These ...
— Trace elements such as Rb, Ba, Sr and Eu, that are concentrated in reactant minerals in the melting process, show considerable scatter within the granites. This is …
South China during the Neoproterozoic, and amalgamated with the NCC since the Early Paleozoic. Thus, our new data suggest that the Alxa Block is most likely a separated Precambrian terrane from the Western Block of the NCC. Key words: North China Craton, Alxa Block, Neoproterozoic, S-type granite, zircon Hf-O isotopes introduction
— Permian granitoids are widely distributed throughout the northern margin of the North China Craton (NCC). However, their origin (petrogenesis) and the tectonic settings in which they formed remain highly debated. The present study focuses on a granitic complex, the Xiari complex located in the western segment of Bainaimiao arc …
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— The Central China Orogenic Belt, a conventional abbreviation for the Qinling-Tongbai-Hong'an-Dabie-Sulu orogens, is located between the North China Block and the South China Block (Fig. 1 A).This is a composite orogenic system (Zheng et al., 2013), in which its eastern segment consists of the Dabie and Sulu orogens and was …
— The HFSE enrichment feature was inherited by granites and further enhanced by protracted crystal fractionation at low oxygen fugacity conditions to produce the TL aluminous A1-type granites but ...
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All are low in Na, Ca, and Sr as a result of chemical weathering during formation of the sedimentary sources. Peraluminous granites of various ages in southwestern North America are distinctly different. They rarely contain cordierite (a mineral characteristic of LFB S-types), but some are highly evolved such that Fe-Mn-rich garnet has ...
— The MAT biotite granite wall rock has an ε Nd t value of −10.6, with a two-stage Nd model age of 1.9 Ga (Supplementary Table 2; Figure 8(a)). The TZ biotite granite wall rocks have whole-rock ε Nd t values of −9.1 to −8.7, with a consistent two-stage Nd model age of 1.9 Ga (Supplementary Table 2; Figure 8(a)).
— The North Dabie zone is bounded by the Xiaotian–Mozitan Fault to the north, the Tan-Lu fault to the east, and the Wuhe–Shuihou shear zone to the south (Fig. 1).About 50% of the area is made up of granitic plutons, which intruded into amphibolite-facies to granulite-facies orthogneisses (including migmatite) with minor metabasites (eclogite …
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— The Xinxing granitic pluton is a large batholith cropping out in southern South China with its long axis parallel to the regional NE–trending faults. We conduct the first comprehensive study of zircon laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) U–Pb chronology and trace element chemistry, rock-forming …
— The northern margin of the North China Craton (NCC) is characterized by widespread Late Paleozoic granites (Fig. 1), which contain significant information about tectonic evolution of North China and have attracted the attention of geologists for decades.Previous studies indicated that Middle to Late Permian A-type granites and …
Granite is the most widespread of igneous rocks, underlying much of the continental crust. Granite is an intrusive igneous rock. Intrusive rocks form. ... Granites usually have a coarse texture (individual minerals are visible without magnification), because the magma cools slowly underground, allowing larger crystal growth.
— The mineral composition of granite plays a crucial role in its formation process. Here are three key points to understand about the composition and mineralogy of granite: Mineral Composition: Granite is …
— It's primarily sourced from feldspar minerals in the granite. Alkali Metals: Granite contains significant amounts of alkali metals, particularly potassium (K2O) and sodium (Na2O), which ...
— The Qinling orogenic belt is located in Central China (Fig. 1 a), bounded to the north by the Luonan-Luanchuan fault and to the south by the Mianlue-Bashan-Xiangguang fault.The Shangdan suture zone divides the Qinling orogenic belt into the NQ and the South Qinling orogen (SQ) (Fig. 1 b).This suture zone is characterized by a …
