Pelite
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PARATETHYAN PETROLEUM SOURCE ROCKS: AN OVERVIEW Open
The Paratethys area extends from Central Europe to the borders of the Caspian Sea in Central Asia and hosts a significant number of petroleum provinces, many of which have been charged by Eocene to Miocene source rocks of supra‐regional si…
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Major-element geochemistry of pelites Open
Pelites (shales and mudstones) are arguably the most important rock type for interpreting metamorphism. Their significance derives from their widespread occurrence and the range of mineral assemblages they develop at different conditions o…
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The Archean BIF-hosted Lamego gold deposit, Rio das Velhas greenstone belt, Quadrilátero Ferrífero: Evidence for Cambrian structural modification of an Archean orogenic gold deposit Open
The Lamego orogenic gold deposit (1.3 Mt measured resources at 7.26 g/t Au) is located at the south-western end of the 5 km-long Cuiabá–Lamego trend, Quadrilátero Ferrífero region, Brazil. Both Archean orogenic gold deposits are situated i…
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Temperature micro-mapping in oscillatory-zoned chlorite: Application to study of a green-schist facies fault zone in the Pyrenean Axial Zone (Spain) Open
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Geologic scenario from granitic sheet to Li-rich pegmatite uncovered by Scientific Drilling at the Jiajika lithium deposit in eastern Tibetan Plateau Open
The Jiajika pegmatite-type lithium deposit emplaced in Upper Triassic turbidites is located in the southeastern Songpan-Ganze terrane of the eastern Tibetan Plateau and is the largest hard-rock lithium deposit in China. The Jiajika Scienti…
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PALEOZOIC TO EARLY MESOZOIC STRATIGRAPHY AND SEDIMENTARY EVOLUTION OF CENTRAL DOLPO (NEPAL HIMALAYA) Open
The stratigraphic succession of central Dolpo (Tarap-Atali area) begins with thick calcsilicate marbles of inferred Cambrol-Ordovician age, injected by pegmatitic dykes. The strongly deformed mid-Paleozoic sequence comprises fossiliferous …
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The fate of calcareous pelites in collisional orogens Open
Although calcareous pelites are important constituents of sediments involved in orogenic processes, their prograde metamorphism is significantly less studied than that of pure pelites with negligible amounts of modal calcite. This paper pr…
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Formation and distribution of tuffaceous tight reservoirs in the Permian Tiaohu Formation in the Malang sag, Santanghu Basin, NW China Open
Based on analysis of major and trace elements, observation of thin sections, cathodoluminescence and scanning electron microscope of tuff samples, in combination with the restoration of paleotopography in the Malang sag, the formation and …
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A black shale protolith for gold-tellurium mineralisation in the Dalradian Supergroup (Neoproterozoic) of Britain and Ireland Open
The Dalradian Supergroup of Britain and Ireland is mineralised by gold-tellurium vein deposits. The host succession includes carbonaceous, pyritic shales (pelites) which were a source of trace elements, including gold and tellurium. LA-ICP…
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Crystallization of Heterogeneous Pelitic Migmatites: Insights from Thermodynamic Modelling Open
Pelitic migmatites are texturally and mineralogically heterogeneous owing to variable proportions of light and dark coloured domains (leucosome and melanosome), the degree to which the two domains are segregated from one another and the va…
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Petrology and geochronology on high-pressure pelitic granulite from Bulunkuole complex in West Kunlun and its tectonic implication Open
西昆仑的深变质岩类主要发育于布伦阔勒岩群之中，其中的高压麻粒岩是西昆仑造山带中目前已知的变质程度最高的岩石。本文以其中的泥质高压麻粒岩为研究对象，结合岩相学、相平衡模拟以及锆石年代学分析等方法进行研究。结果显示其峰期变质矿物组合蓝晶石+石榴石+钾长石，是典型的泥质高压麻粒岩岩石组合。根据相平衡模拟估算，高压麻粒岩相峰期变质的温压条件高于850℃及1.4GPa，退变质的温压条件约为650℃和0.6GPa。SHRIMP U-Pb锆石定年结果显示泥质高压麻粒岩记录了两期变质，第一…
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Peak metamorphic temperature of the Nishisonogi unit of the Nagasaki Metamorphic Rocks, western Kyushu, Japan Open
The Nishisonogi unit of the Nagasaki Metamorphic Rocks represents a part of a Late Cretaceous subduction complex exposed in western Kyushu, Japan. We estimate peak metamorphic temperatures using a Raman carbonaceous material (CM) geothermo…
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A tectonic carpet of Variscan flysch at the base of a rootless accretionary prism in northwestern Iberia: U–Pb zircon age constrains from sediments and volcanic olistoliths Open
The allochthonous complexes of Galicia–Trás-os-Montes Zone (NW Iberia) are part of a rootless tectonic stack which preserves part of a Variscan accretionary prism. They are formed by individual tectonic slices marked by specific tectonomet…
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Lithium isotopic constraints on the petrogenesis of the Jiajika two-mica granites and associated Li mineralization Open
Petrogenesis of two-mica granites and the associated Li mineralization from the Jiajika super-large Li deposit in Sichuan Province, southwest China, remains equivocal. This study analyzed Li contents and isotopic compositions of metasedime…
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The partial equilibration of garnet porphyroblasts in pelitic schists and its control on prograde metamorphism, Glen Roy, Scotland Open
Garnet porphyroblasts in sillimanite‐bearing pelitic schists contain complex textural and compositional zoning, with considerable variation both within and between adjacent samples. The sillimanite‐bearing schists locally occur in regional…
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U–Pb detrital zircon ages from Gorgoglione Flysch sandstones in Southern Apennines (Italy) as provenance indicators Open
Twenty-one sandstone samples belonging to the intermediate part of Gorgoglione Flysch (GF) dated Middle-Miocene, cropping out in the Southern Apennines (Italy), have been studied to highlight the detritus provenance. Petrographic and chemi…
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Distribution of radionuclides in modern sediments of the rivers flowing into the Dnieper-Bug Estuary Open
The article presents the results of large-scale studies of the content and distribution of natural and man-made radionuclides in the sediments of the rivers flowing into the Dnieper-Bug estuary. The article also presents the results of the…
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Tectonic interpretation of the metamorphic field gradient south of the Koralpe in the Eastern Alps Open
In order to constrain tectonic models for the nature of the Eoalpine high pressure belt at the eastern end of the Alps, we investigate the formation pressure of metamorphic rocks along a profile between the Koralpe and the well-known UHP r…
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Regional turbidites and turbiditic environments developed during Neogene and Quaternary in Croatia Open
The Croatian Neogene and Quaternary depositional sequences preserve a record of several different depositional environments with turbidite successions. These are turbiditic systems developed during the Late Miocene in the Croatian part of …
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Genesis of the Huanggangliang Fe-Sn polymetallic deposit in the southern Da Hinggan Range, NE China: Constraints from geochronology and cassiterite trace element geochemistry Open
The Huanggangliang Fe-Sn deposit is located in the southern Da Hinggan Range (NE China), and it's one of the most important deposits within the Huanggangliang-Ganzhuermiao Sn polymetallic metallogenic belt. Nearly 90% of the orebodies (str…
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Ultrahigh–temperature metamorphism and melt inclusions from the Sør Rondane Mountains, East Antarctica Open
This paper reports the first outcrop occurrence of an ultrahigh–temperature (UHT) metamorphic rock from the Sør Rondane Mountains (SRM), East Antarctica. A pelitic gneiss from Balchenfjella, eastern SRM, contains mesoperthite that gave UHT…
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Studies in the geometry of folding and its mechanical interpretation Open
Analysis of thickness variation of folded layers in terms of apparent flattening indicates the relative 11viscositiesrr of the layers, and hence modes of deformation, Orthogonal-thickness ratios, which are unique for each percentage of fla…
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U-Pb (LA-ICP-MS) of detrital zircon and whole rock Nd and geochemical constraints on the provenance, depositional age and tectonic setting of the metasedimentary Piriá Basin, northern Brazil: implications for the evolution of the Gurupi Belt Open
The Piriá Basin (Piriá Formation) is a hemi-graben shaped basin that developed over Precambrian rocks of the Gurupi Belt. The lithological content comprises four interfingered lithofacies: (1) arkose and greywacke with pelite layers, (2) l…
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Full restoration of marine conditions after the late Messinian Mediterranean Lago-Mare phase in Licodia Eubea and Villafranca Tirrena areas (east Sicily) Open
After the Upper Messinian Mediterranean Lago-Mare phase, at the end of the Messinian salinity crisis, the Mediterranean basin was characterized by a return to normal marine conditions starting with the Lower Pliocene (Zanclean). In this pe…
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Mineral assemblage and provenance of the Pliocene Viviparus beds from the Area of Vukomeričke Gorice (Central Croatia) Open
Viviparus beds are sediments deposited in lacustrine and fluvial freshwater environments (Lake Slavonia) during the Pliocene and the earliest Pleistocene. A detailed field study and mineralogical, petrographic and chemical analyses were ca…
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Monazite record for the Paleoproterozoic Svecofennian orogeny, SE Finland: An over 150-Ma spread of monazite dates Open
The Svecofennian orogeny in Fennoscandia is an example of a long-lived orogeny characterised by low pressure, high temperature (LP–HT) metamorphism. In this paper, we present new LA-ICP-MS age data on monazite from fifteen paragneiss sampl…
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Deciphering the metamorphic evolution of the Pulo do Lobo metasedimentary domain (SW Iberian Variscides) Open
The Pulo do Lobo domain is one of the units exposed within the orogenic suture zone between the Ossa-Morena and the South Portuguese zones in the SW Iberian Variscides. This metasedimentary unit has been classically interpreted as a Rheic …
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Remote Sensing, Petrological and Geochemical Data for Lithological Mapping in Wadi Kid, Southeast Sinai, Egypt Open
The Wadi Samra–Wadi Kid district in southeastern Sinai, Egypt, has undergone extensive investigation involving remote sensing analysis, field geology studies, petrography, and geochemistry. The main aim of this study is the integration bet…
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Geochronology and REE geochemistry of zircon and garnet in pelitic gneisses from the Higo metamorphic terrane, Kyushu, Japan: Constraints on the timing of high–temperature metamorphism Open
The Higo metamorphic terrane in west–central Kyushu, southwest Japan, consists of a sequence of greenschist– to granulite–facies metamorphic rocks. This study reports the U–Pb Zrn ages and rare earth elements (REE) characteristics of Zrns …
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Timing and style of high-temperature metamorphism across the Western Gawler Craton during the Paleo- to Mesoproterozoic Open
Combined in situ monazite dating, mineral equilibria modelling and zircon U–Pb detrital zircon analysis provide insight into the pressure–temperature–time (P–T–t) evolution of the western Gawler Craton. In the Nawa Domain, pelitic and quar…