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crushers granite porphyries
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Redox states and genesis of Cu- and Au-mineralized …
1. The Cu-mineralized granite porphyry contains a much higher magmatic fO 2 than the Au-mineralized porphyry. 2. Magmatic fO 2 assemblages of the granite porphyry. 3. The magmatic processes at deep levels lead to dierent fO 2 between Cu- and Au- mineralized granite porphyries. * Wenyan He [email protected] 1 State Key Laboratory of …
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Early Cretaceous Sn-bearing granite porphyries, A-type …
A world-class Sn province in South China contains granite- and porphyry-related Sn deposits. In this paper, we investigate the source of Sn, based on a study of Early Cretaceous (145-134 Ma) ore-barren granites and granite porphyries, ore-barren rhyolites, and Sn-bearing granite porphyries in the Mikengshan (MKS)-Qingxixiang (QXX) …
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Granite is a popular and durable natural stone used in various construction and decorative applications. In the context of mineral processing, a primary crusher plays a crucial role in breaking ...
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(PDF) Zircon U–Pb Ages and Geochemistry of Granite Porphyries …
In this study, geochronological and geochemical analyses were conducted on three samples of these granite porphyries (GPs) using laser ablation inductively coupled plasma mass spectrometry and ...
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Redox states and genesis of Cu- and Au-mineralized granite …
The lithosphere of the Au-mineralized and ore-barren porphyry intrusions was influenced mainly by the slab-derived fluids, whereas the lithosphere of the Cu-mineralized …
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Paleoproterozoic porphyries and coarse-grained granites …
The granite porphyries are made up of a porphyric texture with phenocrysts of K-feldspar (∼15%), quartz (∼5%), plagioclase (∼4%), garnet (∼1%) setting in a fine-grained groundmass (∼75%) of K-feldspar, plagioclase, quartz and aligned biotite. Samples collected from the eastern part were more coarse-grained and contain more feldspar ...
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Zircon U–Pb geochronology and geochemistry of two …
The Jiemeng and Datongkeng granodioritic porphyries have SiO 2 contents in the range of 65.03–69.55 ... Late Mesozoic oxidized magma for porphyry Ag mineralization: A comparative study from mineralized and barren granite porphyries in the Lengshuikeng Ag-(Pb-Zn) deposit, South China. 2020, Journal of Asian Earth Sciences ...
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Zircon U–Pb geochronology and geochemistry of rhyolitic tuff, granite …
The Lengshuikeng rhyolitic tuff, granite porphyry and syenogranite yielded zircon U–Pb ages of 161, 155 and 138 Ma, respectively. The Lengshuikeng granite porphyries belong to calc-alkaline series and show fractionated I-type affinities. The rhyolitic tuffs show almost similar characteristics as the granite porphyries.
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Paleoproterozoic porphyries and coarse-grained granites …
A total of 12 granite porphyries (including samples from MWNC-1 to MWNC-77, Table S1) and country rock sample (MWNC-79) were systematically collected from …
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U-Pb Geochronology, Elemental and Sr-Nd Isotopic
The Early Cretaceous Houyaoyu granite porphyries are located in the south margin of the North China Craton. Field observations, petrography, geochronology, …
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Reworking of juvenile crust beneath the Bangong
The granite porphyries also have high contents of total alkalis (9.9–10.2 wt%) and Fe-numbers (0.87–0.90), and similar Sr–Nd–Hf–O isotopic compositions as the biotite monzogranites, but have higher SiO 2 and lower TiO 2, MgO, TFe 2 O 3, P 2 O 5, CaO, and REE contents, and larger negative Eu anomalies. These features suggest that …
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Petrogenesis and tectonic implications of the Xiachehe granite
Petrogenesis and tectonic implications of the Xiachehe granite porphyries in the Wutai-Hengshan area (North China Craton): Constraints from geochemistry, zircon U-Pb geochronology and Hf isotopes. Feng Ye, Guochen Dong, Jianxun Ren, Yanick Brice Lemdjou, Yanick Blaise Ketchaya, and 2 more ...
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Study Reveals Petrogenesis of Granite Porphyry in Jiama …
The (La/Sm) N-SiO 2, (Dy/Yb) N-SiO 2 evolution trends indicated that different from other felsic porphyries in the Jiama deposit, the magma of granite porphyry experienced the fractional crystallization of hornblende and plagioclase. The fractional crystallization of plagioclase during magma evolution gradually lowered the Sr contents …
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Petrogenesis and tectonic setting of igneous rocks from
The granite porphyries and rhyolites are characterised by high K 2 O and SiO 2 contents, enrichment in light rare-earth elements, strong negative Eu anomalies, and pronounced depletion in Ba, Nb, Ta, Sr, P, and Ti. The quartz-monzonites show enrichment in large-ion lithophile elements (Rb and K), are depleted in heavy rare-earth elements, …
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Supplemental Material: Linking beryllium enrichment to …
Supplemental Text: Analytical methods. Table S1: LA-ICP-MS zircon U-Pb dating data for the Dongshanwan high-silica granite porphyries in the southern Great Xing'an Range. Table S2: Zircon Hf-O isotopic data for the Dongshanwan high-silica granite porphyries in the southern Great Xing'an Range. Table S3: Monazite major …
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Early Cretaceous Sn-bearing granite porphyries, A-type …
Geoscience. Granite. Early Cretaceous Sn-bearing granite porphyries, A-type granites, and rhyolites in the Mikengshan–Qingxixiang–Yanbei area, South China: …
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Early Cretaceous Sn-bearing granite porphyries, A-type …
A world-class Sn province in South China contains granite- and porphyry-related Sn deposits. In this paper, we investigate the source of Sn, based on a study of Early Cretaceous (145–134 Ma) ore-barren granites and granite porphyries, ore-barren rhyolites, and Sn-bearing granite porphyries in the Mikengshan (MKS)–Qingxixiang …
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Geochemical and mineralogical contrasts between economic …
The economic granite porphyries were derived from oxidized magmas. The monzogranite porphyries in Nandaping and Matouwan prospects have relatively weak potential to form Cu–Au mineralization.
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Geochemical and mineralogical contrasts between
The Beiya giant porphyry Au deposit is the largest Cenozoic Au deposit in the Jinshajiang Cu–Mo–Au metallogenic belt. Many granite porphyries of ~36 Ma were exposed in the Beiya deposit, including the Wandongshan (WDS) and Hongnitang monzogranite porphyries (HNT–MPs) with economically important Au metal resources, the …
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What Is Porphyry? How Does It Form, and In Which Rocks?
4.. Granite porphyry. Granite porphyry rocks usually have whitish to pinkish potassium felspar phenocrysts in a coarse-grained (phaneritic) groundmass. But it can have biotite, quartz, or plagioclase phenocrysts, and the groundmass is a typical granitic rock, i.e., 2-4 shades of pink, white, gray, or black.
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Petrogenesis and metallogenic implications of the Miocene granite …
Most granite porphyries are weakly peraluminous with A/CNK values of 0.99–1.07, which is different from other felsic rocks with metaluminous compositions in the Jiama deposit (Fig. 3 b). The MgO and Fe 2 O 3 contents are 0.14–1.03 wt% and 0.88–1.69 wt%, respectively. Table 1.
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Zircon U–Pb geochronology and geochemistry of the Late Jurassic granite
The molybdenum (Mo) mineralization, mainly hosted in granite porphyry, is considered to be granite-related. Zircon U–Pb dating of the granite porphyry yielded concordant ages of 160.81 ± 0.62 Ma, which is consistent with the weighted mean U–Pb age of 160.53 ± 0.65 Ma, indicating that the emplacement of granitic plutons occurred in …
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Geochemical and mineralogical contrasts between
The Beiya giant porphyry Au deposit is the largest Cenozoic Au deposit in the Jinshajiang Cu–Mo–Au metallogenic belt. Many granite porphyries of ~36 Ma were exposed in the Beiya deposit, including the Wandongshan (WDS) and Hongnitang monzogranite porphyries (HNT–MPs) with economically important Au metal resources, …
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Eocene adakitic quartz monzonites and granite porphyries …
A) ANK versus A/CNK plot showing the metaluminous to peraluminous nature of the Qoima Co quartz monzonites and granite porphyries. A = Al 2 O 3, N = Na 2 O, K = K 2 O, and C = CaO (all in molar ...
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U-Pb Geochronology, Elemental and Sr-Nd Isotopic
The Early Cretaceous Houyaoyu granite porphyries are located in the south margin of the North China Craton. Field observations, petrography, geochronology, major and trace elemental and Sr-Nd isotopic compositions are reported to elucidate the genesis of the Houyaoyu granite porphyries. SIMS zircon U-Pb analyses for the …
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Zircon U–Pb Ages and Geochemistry of Granite Porphyries in …
In this study, geochronological and geochemical analyses were conducted on three samples of these granite porphyries (GPs) using laser ablation inductively …
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Geochemical discrimination between fertile and barren
The Eocene (43.3–34.5 Ma) I-type shoshonitic granite porphyries at the Narigongma, Yulong and Beiya porphyry Cu–Mo–Au deposits and Jianchuan, Shigu and Binchuan barren porphyry systems in the Jinshajiang belt were all emplaced in a post-collisional tectonic setting. Detailed geochemical bulk-rock and Sr–Nd–Pb–Hf isotope …
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Element and Sr-Nb-Pb isotope geochemistry of ganite …
The garnet-bearing granite-porphyry dykes in the Yangshan gold belt,Gansu Province,are peraluminum granitoids with A/CNK ratios ranging 1.65～3.65.The granite-porphyries are rich in LILE and LREE,and depleted in Ba,St,Nb,Ta,P and Ti, showing similar trace element pattern to typical syn-collision granites.With ∑REE=54.35～124.01×10~(-6),(La ...
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Petrogenesis of the Eocene Highly Fractionated Granite …
A quantitative model suggests that the Shiguanshan granite porphyries likely formed through the fractionation process of a mineral assemblage consisting of …