NEW U-PB AGES AND ZIRCON HF ISOTOPE DATA FROM THE SOUTHERN COAST MOUNTAIN BATHOLITH AND IMPLICATIONS FOR ALONG STRIKE VARIATION IN MAGMATISM

2016 ◽  
Author(s):  
Emily Homan ◽  
◽  
M. Robinson Cecil ◽  
George Gehrels ◽  
Margaret E. Rusmore
Keyword(s):  
Hf Isotope ◽  
Southern Coast ◽  
Isotope Data ◽  
Zircon Hf Isotope

U-Pb geochronology of Paraná volcanics combined with trace element geochemistry of the zircon crystals and zircon Hf isotope data

2019 ◽  
Vol 89 ◽  
pp. 219-226 ◽  
Author(s):  
Léo A. Hartmann ◽  
Sérgio B. Baggio ◽  
Matheus P. Brückmann ◽  
Daniel B. Knijnik ◽  
Cristiano Lana ◽  
...  
Keyword(s):  
Trace Element ◽  
Hf Isotope ◽  
Trace Element Geochemistry ◽  
Element Geochemistry ◽  
Isotope Data ◽  
Zircon Hf Isotope

The growth of the continental crust: Constraints from zircon Hf-isotope data

Lithos ◽  
2010 ◽  
Vol 119 (3-4) ◽  
pp. 457-466 ◽  
Author(s):  
E.A. Belousova ◽  
Y.A. Kostitsyn ◽  
W.L. Griffin ◽  
G.C. Begg ◽  
S.Y. O'Reilly ◽  
...  
Keyword(s):  
Continental Crust ◽  
Hf Isotope ◽  
Isotope Data ◽  
Zircon Hf Isotope

scholarly journals Supplemental Material: Mantle control on magmatic flare-ups in the southern Coast Mountains batholith, British Columbia

2021 ◽  
Author(s):  
M.R. Cecil ◽  
et al.
Keyword(s):  
British Columbia ◽  
Trace Element ◽  
Hf Isotope ◽  
Geochemical Data ◽  
Location Information ◽  
Southern Coast ◽  
Coast Mountains ◽  
Isotope Data ◽  
O Isotope

<div>Includes sample location information, whole rock geochemical data, and individual zircon trace element, Lu-Hf isotope, and O isotope data.<br></div>

scholarly journals Supplemental Material: Mantle control on magmatic flare-ups in the southern Coast Mountains batholith, British Columbia

2021 ◽  
Author(s):  
M.R. Cecil ◽  
et al.
Keyword(s):  
British Columbia ◽  
Trace Element ◽  
Hf Isotope ◽  
Geochemical Data ◽  
Location Information ◽  
Southern Coast ◽  
Coast Mountains ◽  
Isotope Data ◽  
O Isotope

<div>Includes sample location information, whole rock geochemical data, and individual zircon trace element, Lu-Hf isotope, and O isotope data.<br></div>

scholarly journals Paleoproterozoic Multiple Tectonothermal Events in the Longshoushan Area, Western North China Craton and Their Geological Implication: Evidence from Geochemistry, Zircon U–Pb Geochronology and Hf Isotopes

Minerals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 361 ◽  
Author(s):  
Renyu Zeng ◽  
Jianqing Lai ◽  
Xiancheng Mao ◽  
Bin Li ◽  
Jiandong Zhang ◽  
...  
Keyword(s):  
North China Craton ◽  
Tectonic Evolution ◽  
North China ◽  
Regional Metamorphism ◽  
Hf Isotope ◽  
Crustal Growth ◽  
Quartz Syenite ◽  
Isotope Data ◽  
The North ◽  
Rock Types

The Alxa block is located in the southwestern margin of the North China Craton. The Paleoproterozoic tectonic evolution, crustal growth and tectonic affinity of the block remain unknown or controversial. The Longshoushan (LS) area is one of the few areas that outcrop Paleoproterozoic to crystalline basement rocks in the Alxa Block. In this study, we preset whole-rock geochemistry, zircon U–Pb geochronology and Lu–Hf isotope data from metagabbro, metadiorite, quartz syenite, granitic leucosome and pegmatoid leucosome in the LS area. These rocks all are enriched in LREE and LILE, and depleted in HREE and HFSE. Eight new LA-ICP-MS zircon U–Pb ages yielded three magmatic ages of 2044 Ma, 2029 Ma and 1940 Ma, and three metamorphic ages of 1891 Ma, 1848 Ma and 1812 Ma. Lu–Hf analyses reveal that the magmatic zircons and anatectic/metamorphic zircons from all the rock types are characterized by positive εHf(t) (−0.16 to 10.89) and variable εHf(t) (−11.21 to 6.24), respectively. Based on the previous studies and our new data, we conclude that the LS area experienced three magmatic events (2.5–2.45 Ga, ~2.1–2.0 Ga and ~1.95–1.91 Ga) and three regional metamorphism/anataxis events (~1.93–1.89 Ga, ~1.86–1.84 Ga and ~1.81 Ga) in Paleoproterozoic. The age–Hf isotope data establishes two main crustal growth events at ~2.9–2.5 Ga and ~2.2–2.0 Ga in the LS area. These data indicate that the LS area experienced intraplate extensional setting in the middle Paleoproterozoic, and continental subduction, collision and exhumation in the late Paleoproterozoic. Combining the geochronological framework and tectonic evolution, we suggest that the Alxa Block is part of the Khondalite Belt.

Sign in / Sign up

Export Citation Format

Share Document