Results 71 to 80 of about 672 (207)

Adakite-like signature of Late Miocene intrusions at the Los Pelambres giant porphyry copper deposit in the Andes of central Chile: metallogenic implications [PDF]

, 2003
Adakite-like features are recognized in the Late Miocene (~10 Ma) porphyritic intrusions of the Los Pelambres giant porphyry copper deposit, central Chile (32°S). Located within the southern portion of the flat-slab segment (28–33°S) of the Chilean Andes,
Dietrich, Andreas, Palacios, Carlos, Parada, Miguel A., Parada Reyes, Miguel, Reich, Martin, Schultz, Frank, Palacios Monasterio, Carlos, Reich Morales, Martín, Lehmann, Bernd   +8 more
core   +1 more source

Evidence of Multiple Subducting Slabs Beneath Sulawesi From Teleseismic P‐Wave Tomography

Geophysical Research Letters, Volume 52, Issue 11, 16 June 2025.
Abstract The tectonic evolution of Sulawesi is shaped by complex subduction processes, yet the geometry and extent of its slabs remain debated. Using teleseismic P‐wave tomography, we present a new 3‐D model of the lithosphere and underlying upper mantle beneath Sulawesi, based on passive seismic data from 89 seismic stations.
Lintang Kesumastuti, Simone Pilia, Nicholas Rawlinson, Scott A. Whattam, Pepen Supendi   +4 more
wiley   +1 more source

Zircon U-Pb Age, Sr-Nd-Hf Isotopic Characteristics of Baiyinhushuo Adakite in Inner Mongolia: Implications for Tectonic Evolution

Applied Sciences
The petrogenesis and geodynamic implications of the Early Paleozoic adakitic rocks in the east of Inner Mongolia remain topics of debate. This study presents new petrology data through zircon U-Pb age and Lu-Hf isotopic composition, whole-rock major ...
Yuxu Fan, Qinghui Xiao, Yang Cheng, Yan Li   +3 more
doaj   +1 more source

In Situ Boron Isotope Determination in Amphibole by LA‐MC‐ICP‐MS: Matrix Effects and New Potential Reference Materials

Geostandards and Geoanalytical Research, Volume 49, Issue 2, Page 343-356, June 2025.
Key Points An analytical strategy for determining boron isotope ratios in Ca‐amphiboles using LA‐MC‐ICP‐MS is presented. Accurate δ11B results can be achieved using the USGS BHVO‐2G glass as the calibrating reference material. Two proposed Ca‐amphibole RMs exhibit good homogeneity with δ11B intermediate measurement precision of 2.86‰ and 3.96‰ (2s ...
Enrico Cannaò, Gianluca Sessa, Samuele Agostini, Massimo Tiepolo   +3 more
wiley   +1 more source

Adakite-like magmas from fractional crystallization and melting-assimilation of mafic lower crust (Eocene Macuchi arc, Western Cordillera, Ecuador)

, 2009
The basement of the Western Cordillera of Ecuador consists of a fragment of oceanic plateau crust (Pallatanga) accreted to the continental margin during the Late Cretaceous.
Chiaradia, Massimo
core   +1 more source

A Partial Molten Low‐Velocity Layer Atop the Mantle Transition Zone Beneath the Western Junggar: Implication for the Formation of Subduction‐Induced Sub‐Slab Mantle Plume

Geochemistry, Geophysics, Geosystems, 2022
Deep subduction of plate generally could induce a partial molten low‐velocity layer (LVL) atop the mantle transition zone (MTZ) around the subduction zone.
Guohui Li, Yuanze Zhou, Lin Ding, Yuan Gao, Ling Bai, Heng Zhang, Le Hu, Zhengyang Pan, Changhui Ju, Dingding Zhang   +9 more
doaj   +1 more source

Late Mesozoic Tectonic‐Magmatic Evolution of the Tongbai Orogen, Central China: Implications for Granites Petrogenesis and Gold Mineralization

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.
Abstract Late Mesozoic granitoids are widely distributed throughout the East Qinling‐Tongbai‐Dabie orogenic belt and its periphery, while large‐scale gold deposits during the same period were primarily found in the Xiaoqinling‐Xiong'ershan area, west of the Tongbai orogen.
Lei Ai, Xianquan Ping, Jianping Zheng, Yuping Su, Qiang Ma, Xianbin Shi, Tianci Huang   +6 more
wiley   +1 more source

Early Miocene adakite-like volcanism in the Balkuyumcu region, central Anatolia, Turkey: Petrology and geochemistry

, 2007
International audienceThe Balkuyumcu region, located in the southwestern part of Ankara in the Izmir-Ankara suture zone (central Anatolia, Turkey), consists of basic andesitic, andesitic, dacitic and rhyolitic rocks extruded during the Early Miocene (20 ...
Varol, Elif, Temel, Abidin, Gourgaud, Alain, Bellon, Hervé   +3 more
core   +1 more source

Geochemical indicators for cobalt-rich skarn exploration: constraints from the Pusangguo granodiorite (Gangdese) on geochemistry, zircon U-Pb geochronology and Hf-Nd-Sr isotopes

Frontiers in Earth Science
The Pusangguo skarn-type copper-polymetallic deposit in the Gangdese metallogenic belt hosts economic cobalt mineralization. An integrated study of petrography, zircon U-Pb geochronology, whole-rock geochemistry, and Sr–Nd–Hf isotopes indicates the ore ...
Zhaxi Pubu, Qiong Ci, Fuzhi Gong, Nan Chao   +3 more
doaj   +1 more source

Progress and challenges of big data research on petrology and geochemistry

Solid Earth Sciences, 2018
We are entering the era of big data, and big data achievements have benefited ordinary people. However, big data application in geochemistry research has not been really appreciated. Big data is a kind of method and a pattern of thought.
Shoutao Jiao, Qi Zhang, Yongzhang Zhou, Wanfeng Chen, Xinyu Liu, Gnanachandrasamy Gopalakrishnan   +5 more
doaj   +1 more source