Simon A. Wilde
Yunnan University
Publications 407
Abstract The Dharwar Supergroup comprises the unconformity bound Bababudan and Chitradurga groups. The Bababudan Group, which is best preserved in the Western Dharwar Craton, records a divergent margin comprising a basalt-dominant intracontinental rift sequence, a shale-BIF drift sequence, and a sandstone-shale thermal-subsidence sequence. The rift stage evolved from ∼2765 Ma to ∼2720 Ma, whereas the succession was folded, uplifted and eroded during development of a convergent continental margin...
#1Mudlappa Jayananda (University of Hyderabad)H-Index: 24
#2K.R. Aadhiseshan (University of Hyderabad)H-Index: 1
Last.R. V. Gireesh (Government of Karnataka)
view all 8 authors...
Abstract The Dharwar Craton is a composite Archean cratonic collage that preserves important records of crustal evolution on the early Earth. Here we present results from a multidisciplinary study involving field investigations, petrology, zircon SHRIMP U-Pb geochronology with in-situ Hf isotope analyses, and whole-rock geochemistry, including Nd isotope data on migmatitic TTG (tonalite-trondhjemite-granodiorite) gneisses, dark grey banded gneisses, calc-alkaline and anatectic granitoids, togeth...
1 CitationsSource
#1Shaojie Li (Yunnan University)
#2Xuan-Ce Wang (Chang'an University)
view all 8 authors...
Illitic clay is ubiquitous in clastic hydrocarbon reservoirs, and the host for several radiometric isotopes such as the potassium-argon (K-Ar) and rubidium-strontium (Rb-Sr) systems. This study applied the isotope-dilution thermal ionization mass spectrometry technique for small samples (3–4 mg) to conduct illite Rb-Sr isotope dating of five illitic clay samples from the Silurian bituminous sandstone (SBS) intersected by five drillholes in the Tarim Basin, NW China. The 87Rb/86Sr ratio of clays ...
Abstract The petrogenesis of high-μ (HIMU, μ = 238U/204Pb) basalt in a continental setting remains highly controversial. Here we present a comprehensive geochemical (including major and trace elements and isotopic compositions of whole-rock, olivine and melt inclusions) data on Jurassic HIMU-like basalts from the interior (Antang) of South China. This study identified high-H2O (up to 5.0 wt%) olivine-hosted melt inclusions in these basalts. After stripping off the effects of degassing, post-entr...
#1Ian C. Lyon (University of Manchester)H-Index: 17
#2Monika A. Kusiak (PAN: Polish Academy of Sciences)H-Index: 13
Last.Katie L. Moore (University of Manchester)H-Index: 19
view all 9 authors...
Nanospheres of lead (Pb) have recently been identified in zircon (ZrSiO4) with the potential to compromise the veracity of U-Pb age determinations. The key assumption that the determined age is robust against the effects of Pb mobility, as long as Pb is not lost from the zircon during subsequent geological events, is now in question. To determine the effect of nanosphere formation on age determination, and whether analysis of nanospheres can yield additional information about the timing of both ...
#1Li–Xing LiH-Index: 1
#2Hou–Min LiH-Index: 1
Last.Jie MengH-Index: 1
view all 7 authors...
Abstract The Damiao Fe–Ti–P deposit offers a rare opportunity for studying late-stage Fe–Ti ore-forming processes in Proterozoic anorthosites. The orebodies are hosted in anorthosite and commonly show chlorite-dominated alteration in the contact zone on both sides, but the nature and origin of fluids in Fe-Ti-P mineralization remains contentious. Baddeleyite is a common accessory mineral in anorthosites and Fe–Ti–P orebodies, and typically occurs as blebs and lamella in primary ilmenite reflecti...
#1Li-Xing LiH-Index: 7
#2Jian-Wei Zi (China University of Geosciences)H-Index: 13
Last.Zhe SongH-Index: 1
view all 9 authors...