Topic
Tuffite
About: Tuffite is a research topic. Over the lifetime, 119 publications have been published within this topic receiving 1285 citations.
Papers published on a yearly basis
Papers
TL;DR: In this paper, two samples for SHRIMP analysis were collected from the Fuliangpeng Member from the lower-middle part of Kunyang Group in central Yunnan; here the unit is more than 100 m thick and consists of andesitic ignimbrite, tuffite, terrigeous clastic rocks and carbonates.
Abstract: Whether or not Grenvillian orogeny occurred in South China still remains highly controversial because high-quality, discriminating data are lacking, and therefore, the key to resolve this matter is to find datable volcanic and/or sedimentary rocks related to Grenvillian orogeny. Such rocks are apparently present in the Fuliangpeng Member from the lower-middle part of Kunyang Group in central Yunnan; here the unit is more than 100 m thick and consists of andesitic ignimbrite, tuffite, terrigeous clastic rocks and carbonates. These volcanic rocks, developed south of the Sibao fold-thrust belts, represent the earliest calc-alkaline volcanic activity in late Precambrian time from central Yunnan and are coeval with both a change in sedimentary facies from detritus to carbonates and the beginning of seismite development elsewhere. Two samples for SHRIMP analysis were collected from this volcanic unit. Sample G3-29-2, from the bottom of Fuliangpeng Member, is an ignimbrite, and about 100 zircon crystals recovered from it have euhedral shapes and display relatively simple sector zonation under cathodoluminescent (CL) imaging, suggesting a magmatogenic origin. Twenty-five of the zircons were analyzed and a weighed-mean U-Pb age of 1032±9 Ma was obtained. Sample G3-29-3 from uppermost part of Fuliangpeng Member is a tuffite, and many rounded, evidently detrital zircons were recovered. Nine of these zircons were analyzed, and the oldest single-grain U-Pb zircon age is 1938±26 Ma, implying that Paleoproterozoic basement developed in Cathaysia. The dating result, combined with the geotectonic research on the Fuliangpeng Member, leads us to conclude that late Mesoproterozoic orogenic volcanic activity occurred in the western part of South China, and that the related collision of Yangtze and Cathaysian cratons was an integral part of the assembly of Rodinia.
106 citations
TL;DR: In-situ SHRIMP zircon U-Pb dating and Hf isotope analysis together with geochemical data, seismic profile and magnetic anomaly were carried out on these andesitic tuffs at a depth of 7000m in the Well Moshen-1 in order to reveal the basement character and the evolution of the Junggar Basin and the crustal accretionary process of this region in the Late Paleozoic as discussed by the authors.
76 citations
TL;DR: Based on core and thin section observation, and combined with X-ray diffraction, electron probe and geochemical analysis, the characteristics and origin of tuff tight oil of the Permian Lucaogou Formation in the Jimusaer depression, Junggar Basin were examined.
72 citations
Journal Article•
TL;DR: By means of the LA-MC-ICPMS zircon U-Pb dating, the high-precise dates of the volcanic eruption, 1 611±8 Ma, of an interbedded tuffite layer in the middle part of the Luoykou Formation at the Yangpo Section,Ruzhou City,Henan Province, has been obtained as discussed by the authors.
Abstract: By means of the LA-MC-ICPMS zircon U-Pb dating,the high-precise dates of the volcanic eruption,1 611±8 Ma,of an interbedded tuffite layer in the middle part of the Luoykou Formation at the Yangpo Section,Ruzhou City,Henan Province,has been obtained.With this dates,the depositional age of the Luoyukou Formation can be calibrated accurately as the first time,which indicates that the top age of this formation should be most likely about 1 600 Ma.Moreover,being at the uppermost of the Luoyu Group of the conventional Chinese Neoproterozoic Qingbaikouan System(1 000～800 Ma),which overlies on the Ruyang Group of the Mesoproterozoic Jixian System(1 600～1 000 Ma),at the south margin of the North China Craton(NCC),the new dating achievement of the Luoyukou Formation will result in a major revision in chronostratigraphy that both of the two groups should be lowered down to the older Mesoproterozoic Changchengian System(1 800～1 600 Ma).In addition,it also indicates that the top surface of the Luoyukou Formation might be the operable physical boundary between the Changchengian and Jixian System in this area.On the other hand,combined with the regional data,especially the recent chronostratigraphical dating of the volcanic rocks-dominated Xiong’er Group,which shows that they were erupted mainly from 1 750 Ma to 1 780 Ma in age and superimposed by the Ruyang Group,the depositional time span of both the Luoyu Group and the Ruyang Group can be limited roughly into the period from 1 750 Ma to 1600 Ma.It can correlate with the middle-late portion of the Mesoproterozoic Statherian Period(1 800～1600 Ma) internationally,and that of the Changchengian Period in China.The direct constraints of the 1611±8 Ma zircon U-Pb age of the tuffite bed in the Luoyukou Formation and the major revision of the chronostratigraphical subdivision at the south margin of the NCC provide a up-to-date and critical timescale for some major ongoing research issues of the NCC during the Mesoproterozoic Era,such as the correlation between the northern and southern margin of NCC,the relationship between the development of the NCC and the break-up of the Columbia Supercontinent,the evolution of the early life on the Earth in the deep-time,and so on.
67 citations
TL;DR: In this paper, a comprehensive analysis was conducted on the bulk and molecular geochemical characteristics of the tuffaceous shale, to define the organic matter origin, depositional environment and organic matter accumulation.
58 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 5 |
| 2020 | 6 |
| 2019 | 6 |
| 2018 | 5 |
| 2017 | 2 |
| 2016 | 2 |