Petrogenesis of late Paleoproterozoic I- and A-type granitoids in the southwestern Tarim Craton, NW China: Implications for post-collisional magmatism and tectonic evolution

IF 3.2 2区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Precambrian Research Pub Date : 2025-01-24 DOI:10.1016/j.precamres.2025.107698

Pei Lv , Shengyao Yu , Yinbiao Peng , Lu Yin , Bei Xu , Yongjiang Liu , Sanzhong Li , Xiangyu Gao , Xingzhou Jiang , Chuanzhi Li

{"title":"Petrogenesis of late Paleoproterozoic I- and A-type granitoids in the southwestern Tarim Craton, NW China: Implications for post-collisional magmatism and tectonic evolution","authors":"Pei Lv , Shengyao Yu , Yinbiao Peng , Lu Yin , Bei Xu , Yongjiang Liu , Sanzhong Li , Xiangyu Gao , Xingzhou Jiang , Chuanzhi Li","doi":"10.1016/j.precamres.2025.107698","DOIUrl":null,"url":null,"abstract":"<div><div>Granitoids are important components of collisional orogens and record the tectonic evolution of orogenic belts. To better understand the late Paleoproterozoic orogeny in the Tiekelike area, southwestern Tarim Craton, China, we conducted a petrological, geochemical, and zircon U-Pb geochronological and Lu-Hf isotopic study of granitic dyke, quartz monzonite, quartz monzonitic dyke and granitic gneiss. The results show that these granitoids were emplaced between 1.88 and 1.85 Ga and can be divided into two groups. Group 1 (the granitic dyke and gneiss) are I-type granitoids with higher SiO<sub>2</sub> and alkali contents, and Sr/Y ratios, but lower rare earth element contents than the group 2 (the quartz monzonite and quartz monzonitic dyke), which resemble A<sub>2</sub>-type granitoids. The I-type granitoids were generated by partial melting of ancient lower-crustal rocks, whereas the A<sub>2</sub>-type quartz monzonite and quartz monzonitic dyke were derived by melting of granodiorites under high-temperature and low-pressure conditions. All these late Paleoproterozoic I- and A-type granitoids formed in a post-collisional setting. Integrating our results with previous studies, we propose a model for the late Paleoproterozoic orogenic evolution of the Tarim Craton. The southeastern Tarim Craton (North Altyn Tagh area) first collided with other cratons/blocks at 2.00–1.95 Ga. Subsequently, the unified Tarim Craton was formed by the assembly of the southern and northern Tarim terranes at 1.92–1.90 Ga. Concurrently, the southwestern (Tiekelike area) and northeastern (Kuluketage area) Tarim Craton were also amalgamated with other cratons/blocks. The eastern Tarim Craton (Dunhuang area) then collided with other cratons/blocks at 1.82–1.80 Ga. Finally, the Tarim Craton experienced a high-temperature post-collisional orogeny. The orogeny that affected the Tarim Craton was an integral part of the tectonic evolution of the Columbia supercontinent during the Paleoproterozoic.</div></div>","PeriodicalId":49674,"journal":{"name":"Precambrian Research","volume":"418 ","pages":"Article 107698"},"PeriodicalIF":3.2000,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Precambrian Research","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0301926825000245","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Granitoids are important components of collisional orogens and record the tectonic evolution of orogenic belts. To better understand the late Paleoproterozoic orogeny in the Tiekelike area, southwestern Tarim Craton, China, we conducted a petrological, geochemical, and zircon U-Pb geochronological and Lu-Hf isotopic study of granitic dyke, quartz monzonite, quartz monzonitic dyke and granitic gneiss. The results show that these granitoids were emplaced between 1.88 and 1.85 Ga and can be divided into two groups. Group 1 (the granitic dyke and gneiss) are I-type granitoids with higher SiO₂ and alkali contents, and Sr/Y ratios, but lower rare earth element contents than the group 2 (the quartz monzonite and quartz monzonitic dyke), which resemble A₂-type granitoids. The I-type granitoids were generated by partial melting of ancient lower-crustal rocks, whereas the A₂-type quartz monzonite and quartz monzonitic dyke were derived by melting of granodiorites under high-temperature and low-pressure conditions. All these late Paleoproterozoic I- and A-type granitoids formed in a post-collisional setting. Integrating our results with previous studies, we propose a model for the late Paleoproterozoic orogenic evolution of the Tarim Craton. The southeastern Tarim Craton (North Altyn Tagh area) first collided with other cratons/blocks at 2.00–1.95 Ga. Subsequently, the unified Tarim Craton was formed by the assembly of the southern and northern Tarim terranes at 1.92–1.90 Ga. Concurrently, the southwestern (Tiekelike area) and northeastern (Kuluketage area) Tarim Craton were also amalgamated with other cratons/blocks. The eastern Tarim Craton (Dunhuang area) then collided with other cratons/blocks at 1.82–1.80 Ga. Finally, the Tarim Craton experienced a high-temperature post-collisional orogeny. The orogeny that affected the Tarim Craton was an integral part of the tectonic evolution of the Columbia supercontinent during the Paleoproterozoic.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Precambrian Research 地学-地球科学综合

CiteScore

7.20

自引率

28.90%

发文量

325

审稿时长

12 months

期刊介绍： Precambrian Research publishes studies on all aspects of the early stages of the composition, structure and evolution of the Earth and its planetary neighbours. With a focus on process-oriented and comparative studies, it covers, but is not restricted to, subjects such as: (1) Chemical, biological, biochemical and cosmochemical evolution; the origin of life; the evolution of the oceans and atmosphere; the early fossil record; palaeobiology; (2) Geochronology and isotope and elemental geochemistry; (3) Precambrian mineral deposits; (4) Geophysical aspects of the early Earth and Precambrian terrains; (5) Nature, formation and evolution of the Precambrian lithosphere and mantle including magmatic, depositional, metamorphic and tectonic processes. In addition, the editors particularly welcome integrated process-oriented studies that involve a combination of the above fields and comparative studies that demonstrate the effect of Precambrian evolution on Phanerozoic earth system processes. Regional and localised studies of Precambrian phenomena are considered appropriate only when the detail and quality allow illustration of a wider process, or when significant gaps in basic knowledge of a particular area can be filled.