Results 121 to 130 of about 30,693,449 (167)

Contrasts betweenI‐ andS‐type granitoids of the Kosciusko Batholith

Journal of the Geological Society of Australia, 1978
Abstract Two distinct groups of granitoids occur on the eastern side of the Kosciusko Batholith. Those considered to be derivatives of sedimentary source rocks (S‐types) are usually foliated and either contain cordierite or white‐mica secondary after cordierite.
R. Hine, I. S. Williams, B. W. Chappell, A. J. R. White   +3 more
openaire   +1 more source

Polymetallic mineralisation associated with Carboniferous I‐type granitoids in central Stewart Island, New Zealand

New Zealand Journal of Geology and Geophysics, 2016
ABSTRACT Carboniferous granitoids in central Stewart Island host two metalliferous hydrothermal systems that formed during emplacement of the c. 306 ± 2 Ma old Euchre Pluton and 303 ± 2 Ma Hill 267 leucogranitoid, respectively. The Ogles Creek–Silvertown Hydrothermal System (OST) on the eastern side of South West Arm, Paterson Inlet ...
AH Allibone, D MacKenzie, R Turnbull, A Tulloch, D Craw   +4 more
openaire   +1 more source

Orosirian I-type calc-alkaline granitoids from northern Brazil: Petrogenetic implications for evolution of the central Amazonian Craton

Lithos, 2021
Abstract New petrographic, lithochemical, in situ U Pb geochronological and Nd isotopes data allowed to propose a petrotectonic model for 1.90–1.88 Ga I-type calc-alkaline granitoids (Terra Preta Massif - TPM, Agua Branca Suite) from the southernmost Uatuma-Anaua Domain (UAD), Ventuari-Tapajos Province (VTP), central Amazonian Craton, Brazil.
Cristóvão da Silva Valério, Moacir José Buenano Macambira, Valmir da Silva Souza, Elton Luiz Dantas, Roberto Dall'Agnol   +4 more
openaire   +1 more source

Association of A‐ and I‐type granitoids in the central Aravalli orogen, Rajasthan: Implications for the Neoproterozoic tectonic evolution of north‐west India

Geological Journal, 2022
We present new mineralogical and geochemical data for the granitoid plutons of the Neoproterozoic Sendra Granitoid Suite, central Aravalli orogen, north‐west India to constrain their petrogenesis and tectonic setting. The granitoids can be classified into two groups: (a) A‐type Chang, Chitar, Borwar, and Seliberi plutons and (b) I‐type Jaitpura pluton.
Jaideep K. Tiwana, Parampreet Kaur, Naveen Chaudhri   +2 more
openaire   +1 more source

Geochemistry and petrogenesis of Pan-African I-type granitoids at Gabal Igla Ahmar, Eastern Desert, Egypt

Journal of African Earth Sciences, 1996
Abstract Younger granites (post tectonic) are common throughout the Precambrian igneous/metamorphic terrain of Egypt and they played a significant role in the evolution of the Pan-African crust. The Gabal Igla Ahmar pluton comprises two magmatic suites: a calc-alkaline diorite/quartz diorite-granodiorite suite and an aluminous monzogranite-granophyre
Mohamed A. Hassanen, Said A. El-Nisr, Fathy H. Mohamed   +2 more
openaire   +1 more source

Magmatic recycling of accretionary wedge: A new perspective on Silurian-Devonian I-type granitoids generation in the Chinese Altai

Gondwana Research, 2020
Abstract The mechanism for generation of Silurian-Devonian hornblende-bearing I-type granitoids in the Chinese Altai still remains rather obscure. The possibility that they are derived from the regional anatexis of the Ordovician accretionary wedge, i.e., the Habahe Group, is investigated.
Yanqiong Huang, Yingde Jiang, Stephen Collett, Sheng Wang, Kang Xu, Tan Shu, Pengfei Li, Chao Yuan   +7 more
openaire   +1 more source

Hercynian I-type and S-type granitoids from the Slavonian mountains (southern Pannonian Basin, northern Croatia)

Neues Jahrbuch für Mineralogie. Abhandlungen, 1996
Two genetically different groups of Hercynian granitoids occur in the Slavonian Mountains which are included in the southern Pannonian Basin. I-type granitoids occur in Barrovian-type progressive metamorphic sequences which originated during the Hercynian orogeny from the Late Silurian to Lower Carboniferous magmatic-sedimentary complex.
Pamić, Jakob, Belak, Mirko
openaire   +3 more sources

Neoproterozoic highly fractionated I-type granitoids of Shillong Plateau, Meghalaya, Northeast India: geochemical constraints on their petrogenesis

Acta Geochimica, 2020
There are several Pan-African granitoid plutons widely distributed in Shillong Plateau, NE India. Nongpoh (506.7 ± 7 Ma) and Mylliem (480–430 Ma) plutons were chosen for the petrological and geochemical study to constrain their petrogenesis. Nongpoh pluton consists of coarse-grained porphyritic quartz-monzogranite (NQM) and Mylliem pluton consists of ...
Debjani Choudhury, M. Faruque Hussain
openaire   +1 more source

Oxygen and hydrogen isotope geochemistry of S- and I-type granitoids: the Cape Granite suite, South Africa

Chemical Geology, 1997
Abstract The Late Precambrian Cape Granite suite of the southwestern Cape, South Africa, can be subdivided into six major batholiths (Saldanha-Vredenburg, Darling, Malmesbury, Paarl-Wellington-, Stellenbosch-Kuils River, and Peninsula). Individual plutons have been classified as A-, I- and S-type granites on the basis of petrography and chemical ...
Chris Harris, Kevin Faure, Roger E. Diamond, Reyno Scheepers   +3 more
openaire   +1 more source

Petrology of leucocratic granitoids in the northwest of Iran with emphasis on leucocratic I-type granites from SW Saqqez

Neues Jahrbuch für Mineralogie - Abhandlungen, 2007
The leucocratic granitoids of NW Iran including S-type, A-type and I-type leucogranites, are located in the SanandajSirjan Metamorphic Belt (SSMB) and Alborz-Azarbaijan Zone (AAZ). I-type leucogranites have been reported from the BukanMahabad, Meshgin-Shahr and Saqqez areas. The Tamuteh leucogranites (SW Saqqez) are located in the SSMB and are composed
Seyed Fakhraddin Athari, Ali Asghar Sepahi, Mohssen Moazzen   +2 more
openaire   +1 more source