9th Hutton Symposium

FIELD TRIPS

2018 - 11 - 17

Post-conference field trip -2

Post-conference field trip -2a:Cretaceous granitic complexes and the Tiger Hill Park in Suzhou, Jiangsu Province Time: Saturday October 19th – Monday October 21st, 2019 Price: $450 US dollarsThis three-day field trip will bring the Hutton Symposium attendants to the Suzhou Mesozoic granitic complex and the volcanic rocks of the Tiger Hill park.The Suzhou granitic complex is located approximately 10 km west of Suzhou in southeast Jiangsu Province. It was emplaced into Devonian sandstones and is exposed over an area of 11 km2. The trip will examine three units of the Suzhou granitic complex, including the amphibole- and biotite-bearing granite, biotite granite, and fine-grained K-feldspar granite.A unique rock type, glimmerite, is present at the top of the main granite unit and comprises about 30% biotite. Zircon U–Pb ages (~124 Ma) indicate that the Suzhou granitic units were all emplaced in the Cretaceous. These granitic rocks are also enriched in rare metals...
2018 - 11 - 17

Post-conference field trip -1

Post-conference field trip -1:Post-collisional granitoids and migmatites in the Dabie orogen, east-central China Time: Saturday October 19th – Tuesday October 22nd October, 2019 Price: $500 US dollars The Dabie orogen in east-central China is a continent-continent collisional orogen that was produced by northward subduction of the South China Block beneath the North China Block in the Triassic. It is characterized by the occurrence of ultrahigh-pressure (UHP) metamorphic rocks with index minerals such as coesite and microdiamond. These characteristics demonstrate deep subduction of the continental crust to subarc depths. Numerous post-collisional granitoids were produced in the Early Cretaceous, contemporaneously with migmatites. Relict zircons in both granitoids and migmatites have similar U–Pb ages indicating that they were derived from reworking of the deeply subducted continental crust in the post-collisional stage. The post-collisional granitoids in...
2018 - 11 - 17

Mid-conference field trip

Mid-conference field trip:Cretaceous adakitic quartz diorite and sedimentations around Nanjing Time:Wednesday October 16th, 2019 Price: This mid-conference field trip is included in the registration fee. The mid-conference field trip will include excursions to the Anjishan pluton, the Upper Cretaceous Pukou Formation, and cultural heritage sites around Nanjing.The Anjishan pluton is located in the Ningzhen area of the Lower Yangtze region. It is composed of porphyritic granodiorite and quartz diorite. New LA-ICP-MS U–Pb zircon ages suggest that the Anjishan granodiorite formed at 108.8 ± 1.2 Ma (Liu JM et al., 2014, Geol. Rev.). The Anjishan rocks are characterized by geochemical features typical of adakitic rocks (i.e., high Mg#, Sr/Y, La/Yb, and low Y and Yb). These geochemical features suggest that the thickness of the crust in this area exceeded 40 km in the Early Cretaceous, which is greater than the present-day thickness of ~30 km. This indicates that the...
2018 - 11 - 17

Pre-conference field trip -2

Pre-conference field trip -2: Late Mesozoic I- and A-type granites and volcanic-intrusive complexes along the coast of Zhejiang Province Time: Wednesday October 9th – Sunday October 13th, 2019 Price: $550 US dollarsDuring this field trip we will visit the felsic intrusive and volcanic rocks that formed in a Mesozoic active continental margin along the coast of Zhejiang Province.We will first visit the Mount Putuo I- and A-type granites. Mount Putuo is an island in the northeast of Zhejiang Province that derives its name from a sacred Buddhist mountain at the center of the island. It is a renowned site in Chinese Buddhism and records multiple episodes of Mesozoic granitic magmatism. The island mainly comprises I-type and A-type composite granitic complexes. Zircon age dates suggest that the island is composed of three Mesozoic intrusions, which were generated at 110 Ma, 90 Ma, and 70 Ma, respectively. The intrusions are thought to have been generated in ...
2018 - 11 - 15

Pre-conference field trip -1

Pre-conference field trip -1: Paleoproterozoic and Late Mesozoic Granitic rocks in Beijing, North China Craton Time:Wednesday October 9th – Sunday October 13th, 2019 Price: $450 US dollars The North China Craton (NCC) is the largest Archean craton in China. It was stabilized in the Paleoproterozoic and was subsequently covered by a thick sequence of Proterozoic to Paleozoic sediments. It was destabilized during the Mesozoic and since then experienced intense compressional–extensional deformation, magmatism (i.e., decratonization). This trip offers an excellent opportunity to examine the cratonization and decratonization processes of the NCC through visits to the ancient basement rocks, the sedimentary cover, the Paleoproterozoic rapakivi pluton, and the Late Mesozoic plutons associated with the Late Mesozoic Yunmenshan metamorphic core complex (MCC) around Beijing.Fig. 1 Simplified geological map for the granitoids in the Beijing area.Fig. 2 An overall view of the Great...