Minerals, Free Full-Text
Por um escritor misterioso
Last updated 16 março 2025

The Tuwu-Yandong porphyry Cu belt is located on the southern margin of the Dananhu island arc in eastern Tianshan, constituting the largest Cu metallogenic belt in Northwest China. Two episodes (~334 Ma and ~317 Ma) of porphyry Cu-Mo mineralization in the belt have been recognized, associated with Early and Late Carboniferous felsic intrusions, respectively. The Carboniferous intrusions, therefore, provide a unique opportunity to investigate tectono-magmatic-metallogenic evolution of the belt. New LA–ICP–MS zircon U–Pb dating indicates that the mineralization-related and post-mineralization intrusions (granodiorite porphyry, gabbro, and granite porphyry) were formed at 321.8 ± 3.1 Ma, 313.5 ± 1.2 Ma, and 309.8 ± 2.5 Ma, respectively. The zircon trace element shows that the granodiorite porphyry (Ce4+/Ce3+ ratios, avg. 129, median = 112, n = 15) was likely derived from a more oxidized (and hydrous) magma source than that of the gabbro (Ce4+/Ce3+ ratios, avg. 74, median = 40, n = 15) and granite porphyry (Ce4+/Ce3+ ratios, avg. 100, median = 91, n = 15), being favorable for porphyry copper mineralization. The granodiorite porphyry shows an adakitic affinity (e.g., high Sr/Y ratios and low Y contents) and has high εNd(t) (6.4–6.7), εHf(t) (11.4–14.3), and Mg# values (47.4–58.1) and low (87Sr/86Sr)i (0.703804–0.703953), suggesting that the melt was derived from partial melting of a subducted oceanic slab followed by mantle peridotite interaction. The gabbro exhibits higher Al2O3 (16.5–17.4 wt.%), Cr (107–172 ppm), and Ni (37–77 ppm) contents and εNd(t) (6.6–7.2), εHf(t) (11.6–15.9), and Mg # (53.3–59.9) values, while it has lower (87Sr/86Sr)i values (0.703681–0.703882) than the granodiorite porphyry, indicating a depleted mantle source. The granite porphyry exhibits an affinity with non-fractionated I-type granites and possesses higher SiO2 (71.1–72.0 wt.%) contents, lower but positive εNd(t) (4.8–5.2), εHf(t) (10.3–13.0), and Mg # (38.7–41.0) values, and higher (87Sr/86Sr)i (0.704544–0.704998) than the granodiorite porphyry and gabbro, together with young Nd and Hf model ages, suggesting that the parental magmas originated from the partial melting of a juvenile lower crust. The enrichment in LREEs and LILEs (e.g., Ba, U, K and Sr) and depletion in HFSEs (e.g., Nb, Ta, and Ti) indicate that these intrusive rocks formed in the subduction zone. With the integration of previous studies, it can be inferred that the northward flat subduction of the Kangguer ocean slab at ca. 335–315 Ma caused the formation of the adakites and associated porphyry Cu mineralization in the Tuwu-Yandong belt. After the prolonged flat subduction, slab rollback may have occurred at ca. 314–310 Ma, followed by a “quiet period” before the final closure of the ancient Tianshan Ocean along the Kangguer Fault in this belt.

Monthly Mineral Chronicles Volume 4 Issue 7 - Steve Sorrell's Ko-fi Shop - Ko-fi ❤️ Where creators get support from fans through donations, memberships, shop sales and more! The original 'Buy Me

Stream Ebook The Copper Revolution: Healing with Minerals full from simeonjomaschmitt

Minerals written down hi-res stock photography and images - Alamy

The Real Meat Company Turkey & Venison Air-Dried Dog Food – Furly's Pet Supply

Liquid Ionic Plant Supplement Immune & Cardiovascular Health, Metabo – Earth's Pure

PÃœR MINERALS 4-in-1 Sculpting Concealer, Moisturizing Formula, Covers Imperfections, Lightweight medium to full coverage, Revitalizes Complexion, Cruelty-Free, Gluten Free- DN5

PSA: Bare Minerals Birthday Gift = Full Size Liquid Lipstick!! : r/MakeupAddiction

Vegan Multivitamins & Minerals, 180 Palm Oil Free Tablets

Minerals for the Future
Recomendado para você
-
Schematic tectonic map of the Central Asian Orogenic Belt (CAOB16 março 2025
-
CAOB_ Clube de Atletismo de Oliveira do Bairro16 março 2025
-
CAOB 中央アジア造山帯16 março 2025
-
CAOB Supports Airport Project & America's Cup - Bernews16 março 2025
-
Sugba Lagoon Caob - Siargao, Philippines - Viento Del Mar16 março 2025
-
Lower Moscovian Limestones of the Bogdashan Range (NW China) as an16 março 2025
-
Frontiers Deep Crustal Structure of the Eastern Central Asian16 março 2025
-
CAOB Scholarship Fund Event - The Royal Gazette16 março 2025
-
SIARGAO Islands Sugba Lagoon – TheWanderKit16 março 2025
-
File:Epidendrum rondoniense 'Sweet Angel' L.C.Menezes, Bol. CAOB 316 março 2025
você pode gostar
-
100+] Cool Roblox Pictures16 março 2025
-
Beyblade's Physics and Engineering: Factors of Design & Performance16 março 2025
-
AnimeHub on X: World's End Harem: After World special illustration #終末のハーレム / X16 março 2025
-
i'm about to finally get into bleach, does anyone have anything should know before i start? : r/bleach16 março 2025
-
Wubbox Variations, My Singing Monsters Asia Wiki16 março 2025
-
Review Minecraft Dungeons: novo RPG é muito divertido e tem preço justo16 março 2025
-
The King's Avatar (Anime) –16 março 2025
-
Roblox ALONE by Myself with Other People playing Alone (FGTeeV vs. Scariest Roblox Game)16 março 2025
-
Fighters Rec16 março 2025
-
Hussein Jaber - Vasto Lorde16 março 2025