Results 61 to 70 of about 166,331 (170)

Petrography, Petrology, and Geochemistry of Subvolcanic Bodies in Dogan Porphyry Copper-Molybdenum Deposit (Toroud-Chah Shirin Belt) [PDF]

پترولوژی
IntroductionDogan mining area is located on the northern edge of Iran's central desert plain and northwest of Toroud village. Structurally, the area is a part of Central Alborz, Eastern Alborz, and Central Iran zones, which gave rise to the formation of ...
Shadi Sattari, Mohammadreza Hosseinzadeh, Mohsen Moayyed   +2 more
doaj   +1 more source

Role of Post‐Collisional Magmatism in Continental Growth and Reworking Since the Late Archean

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract The mechanisms responsible for the formation and compositional evolution of continental crust remain central questions in Earth science. Post‐collisional magmatism is widely preserved in the continental record; however, its contribution to crustal growth may be underestimated because enriched isotopic signatures obscure juvenile mantle input ...
Dongjian Ouyang, Ross N. Mitchell, Peng Peng, Jinghui Guo, Qiuli Li   +4 more
wiley   +1 more source

Sedimentology and geochemistry of the recent sediments of the river system on Hurd Peninsula, Livingston Island, Antarctica

The Depositional Record, Volume 12, Issue 4, September 2026.
This study investigates the sedimentology and geochemistry of recent sediments from ephemeral river systems on Hurd Peninsula, Livingston Island, Antarctica. These systems are important for understanding sedimentary and geochemical processes in unique polar environments.
Yakup Çelik, Merve Özyurt, Raif Kandemir   +2 more
wiley   +1 more source

Detrital zircon ages, Lu‐Hf isotopes of zircon grains, Sr‐Nd isotopes on whole rock and geochemistry of Campanian turbidites in the Eastern Pontides (NE Türkiye): A provenance assessment and Gondwana records

The Depositional Record, Volume 12, Issue 4, September 2026.
These findings confirm that the Campanian‐aged Bozbent Member turbiditic sequence in the Eastern Pontides was deposited in an extensional fore‐arc basin and therefore exhibits the petrographic and geochemical characteristics of passive margin sandstones.
Çiğdem Saydam Eker, Cem Yücel, Abdullah Kaygusuz, Emre Aydınçakır, Youn‐Joong Jeong, Sinan Yılmazer, Kadir Sünnetçi   +6 more
wiley   +1 more source

The quartz-dioritic Hospitais intrusion (SW Iberian Massif) and its mafic microgranular enclaves: evidence for mineral clustering [PDF]

, 2015
The Hospitais pluton is an elliptical body, with its long axis oriented WNW–ESE, that belongs to the Évora Massif(Iberian Variscan belt). This intrusion has a quartz-dioritic composition, with plagioclase, quartz, amphibole(hornblende, but locally also ...
Costa, M. M., Pereira, M. F., Corfu, F., Costa, Mafalda M., Moita, P., Santos, J. F., Corfu, Fernando, Canas Portela Costa, Maria Mafalda, Pereira, Manuel, Moita, Patrícia, Santos, José F.   +10 more
core   +1 more source

Formation Age and its Geological Significance of Quartz Diorite from Cryptoexplosive Breccia in Dalucao Rare Earth Mine, Sichuan Province

Kuangchan zonghe liyong
To limit the diagenetic age of quartz diorite in the crypto-explosion breccia of the Dechang Dalucao in Sichuan Province, LA-ICP-MS zircon U-Pb chronology was carried out.
Wei YANG, Xiaohong XIA, Tuqiang LIU, Long CHENG, Zhiyuan XIE, Shangrong LIU, Hongqi TAN   +6 more
doaj   +1 more source

Impacted Bones: Can Extant Primates Help Identify Tool Use in Early Hominins?

Evolutionary Anthropology: Issues, News, and Reviews, Volume 35, Issue 3, September 2026.
ABSTRACT Despite recent advances pushing back the earliest record of tool use, how and when it first emerged in hominins, and the extent to which it featured amongst the numerous co‐existing species, remain critical questions in paleoanthropology. In addition to analyzing fossils and lithic toolkits, novel strides in understanding this might be made by
Rachel M. Hurwitz, Katarina Almeida‐Warren, Susana Carvalho, Thomas A. Püschel   +3 more
wiley   +1 more source

GEOCHRONOLOGY OF ALKALINE ROCKS FROM THE BURPALA MASSIF (NORTHERN PRIBAIKALYE): NEW U-Pb DATA

Геодинамика и тектонофизика
Geochronological studies have been made on the main types of rocks from the Burpala alkaline massif and two gabbro and gabbro-diorite dikes located nearby.
I. А. Izbrodin, А. G. Doroshkevich, А. V. Malyutina, D. V. Semenova, Т. А. Radomskaya, М. N. Kruk, I. R. Prokopyev, А. Е. Starikova, М. О. Rampilov   +8 more
doaj   +1 more source

Geochemistry, Petrology and Zircon U-Pb Dating for Bibi Maryam Granitoid, NE of Nehbandan, East of Iran

Journal of Economic Geology, 2011
Bibi Maryam granitoid body with about 5 Km2 has intruded into ophiolite mélange complex in sistan suture zone, in east of Iran. Thermal effects of this body on the host rocks show that this activity occurred after emplacement of ophiolite mélange ...
Mohammad Hossein Zarrinkoub, Sun-Lin Chung, Seyyed Saeid Mohammadi, Mohammad Mahdi Khatib   +3 more
doaj   +1 more source

Dissolved Organic Carbon Concentration, Soil Type, and Forestry Activities Influence the Continued Acidification of Sensitive Streams in Galloway, Southwest Scotland

Hydrological Processes, Volume 40, Issue 9, September 2026.
The amount of peat and peaty soil cover in a catchment, weather conditions and season, and forestry activities were found to impact dissolved organic carbon (DOC), pH and other water quality indicators in a spatially variable catchment in Galloway, Southwest Scotland. High concentrations of DOC are limiting the recovery from acidification expected with
Michael R. Muir, Lewis Robertson, Kerry Morrison, Kenny Galt, Adrian M. Bass, T. Edward Turner, Emily Taylor   +6 more
wiley   +1 more source