Results 61 to 70 of about 10,620 (270)

Apatite in Carbonatite Preserving Primary Magmatic, Post‐Magmatic Overgrowth, and Post India‐Asia Collision‐Related Hydrothermal Alteration: Evidenced From U–Pb Isotope and Trace Element Geochemistry

Geological Journal, EarlyView.
U–Pb isotope and trace element geochemistry of apatite from carbonatites of Peshawar Plain Alkaline Igneous Province, western Himalaya shows Permo‐Carboniferous magmatism, an additional magmatic pulse during Cretaceous, and post‐magmatic hydrothermal/metasomatism during Oligocene. ABSTRACT U–Pb isotope and trace element geochemistry of apatite combined
Mehboob ur Rashid, Hafiz U. Rehman, Hao‐Yang Lee, Sun‐Lin Chung, Kaushik Das, Kazumasa Aoki, Muhammad Jawad Zeb, Nasir Ahmad, Muhammad Hussain, Hiroshi Yamamoto   +9 more
wiley   +1 more source

The mechanism of NaCl action on the selective separation of Na-feldspars and K-feldspars [PDF]

, 2010
Günümüzde yüksek içerikli Na-feldspat veya K-feldspat içeren cevherler tükenmiştir. Bu ürünleri barındıran cevher yataklarından her ikisinin de seçimli olarak endüstrinin istediği standartlarda
İlhan GÜLGÖNÜL, Mehmet Sabri ÇELİK
core   +1 more source

Investigation of the firing temperature effects on clay brick sample; Part-I: Mineralogical phase characterization

Bibechana, 2018
Present research work was focused to investigate the firing temperature effects on mineralogical phase composition of nine clay bricks collected from the brick factory of Kathmandu valley using X-ray diffraction (XRD) patterns and Fourier transform ...
Narendra Bahadur Bohara, Lal Bahadur Bhat, Dol Bahadur Ghale, Nirjan Duwal, Jagadeesh Bhattarai   +4 more
doaj   +3 more sources

Heterogeneous Exhumation Mechanisms in Neoproterozoic Collisional Metamorphism: P–T Constraints From Pelotas and Punta del Este Terranes, Southern Brazil and Uruguay

Geological Journal, EarlyView.
Petrography, thermobarometry, and pseudosection modelling reveal peak metamorphic conditions of 3–7.5 kbar and 520°C–800°C in Tonian‐Cryogenian orthogneisses of the Dom Feliciano Belt. Metamorphic field gradients of 27°C/km–39°C/km and variable exhumation mechanisms support correlation of these units as remnants of a Himalayan‐type Piratini Orogeny ...
Thaiane Niederauer‐Santos, Carla Cristine Porcher, Daniel Triboli Vieira, Edinei Koester, Diego Jaldín, Karina Luengo, Luisa Caon   +6 more
wiley   +1 more source

Processing of hornblende syenite for ceramics [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2010
The purpose of this research is to preliminarily study the hornblende syenite processing. The study includes characterization,separation and evaluation.
Chairoj Rattanakawin, Suraphol Phuvichit, Yuenyong Panjasawatwong, Siwadol Supapia   +3 more
doaj  

Rock magnetism of quartz and feldspars chemically separated from pelagic red clay: a new approach to provenance study

Earth, Planets and Space, 2018
Magnetic mineral inclusions in silicates are widespread in sediments as well as in igneous rocks. Because they are isolated from surrounding environment, they have potential to preserve original magnetic signature even in chemically altered sediments ...
Yoichi Usui, Takaya Shimono, Toshitsugu Yamazaki   +2 more
doaj   +1 more source

Miocene to Quaternary Tectonostratigraphic Evolution of the Northern Section of the Burdur‐Fethiye Shear Zone, South‐Western Türkiye

Geological Journal, EarlyView.
New zircon ages reveal that lacustrine sedimentation initiated in the Late Miocene (Messinian), revising earlier Pliocene age assignments. The study results support the interpretation of the northern BFSZ as a broad left‐lateral transtensional shear zone rather than a discrete sinistral fault or simple extensional graben array.
İrem Elitez, Gürsel Sunal, Cenk Yaltırak, İsak Yılmaz   +3 more
wiley   +1 more source

Modern sands of the Gulf of Mexico: Discriminating fluvial and coastal sand composition

Ciencias Marinas, 2003
 A forward stepwise linear discriminant analysis, A-Nova test and R-mode factor analysis were used on modern beach, dune and river sands to discriminate the geographic distribution of detrital modes between sands sourced by volcanic rocks (Trans-Mexican
JJ Kasper-Zubillaga, A Carranza-Edwards
doaj   +1 more source

(Table 3) Chemical composition of feldspars of basalts from ODP Leg 121

, 1991
(Table 3) Chemical composition of feldspars of basalts from ODP Leg ...
Andrew D Saunders (6959609), Philip Leat (6972785), Robert N Thompson (6972197), Storey, Michael, Thompson, Robert N, Leat, Philip, Michael Storey (2846030), Janet M Hergt (6959228), Gibson, Ian L, Saunders, Andrew D, Ian L Gibson (6961334), Hergt, Janet M   +11 more
core   +1 more source

Petrogenesis and Tectonic Setting of Late Mesozoic Felsic Magmatic Rocks in the Wangmushan Mining District, Northern Fujian, South China

Geological Journal, EarlyView.
The rhyolitic ignimbrite and K‐feldspar granite porphyry from the Wangmushan mining district, northern Fujian yield ages of 173.8 ± 0.8 and 102.6 ± 0.4 Ma, respectively. Geochemical data, zircon trace elements, whole‐rock Sr–Nd–Pb isotope data, and zircon Hf isotopic compositions indicate that the rhyolitic ignimbrite originated from partial remelting ...
Wei Shaogang, Hong Wentao, Xiao Fan, Jin Guodong, Shi Hongyang, Ma Zhiwang, Wu Chen, Xue Yujingyang   +7 more
wiley   +1 more source