In this study, we compiled major and trace element data of granites from within (n = 1932) and outside (n = 6109) South China, as well as updated the South China mineral database on major LREE-rich (n = 105) and HREE-rich (n = 23) deposits (Fig. 1). We aim to better understand any geochemical difference between granite in and outside South ...
Read Online Geology And Mineral Resources Of Yemen and Download Geology And Mineral Resources Of Yemen book full in PDF formats. ... epithermal Au-Ag/sulfide vein type family, skarn, granite-related pegmatite-REE deposits), (3) hydrothermal orogenic gold and volcanogenic massive sulfide (VMS) deposits, as well as (4) surficial mineral deposits ...
The quartz + biotite-dominated diorite (Orbicule Koppie) and the pyroxene-diorites (Hoogkraal Lease, Henderson South, Henderson North), together with more felsic anorthosite and the more mafic pyroxenites, are all produced by progressive AFC + recharge processes, where the magma was most likely anatectic melts of the country rocks that were at ...
Triassic granites in South China are grouped into five types based on their mafic minerals and geochemical features. • The Triassic granites and their coeval magmatic rocks are distributed in three different zones in South China. • The Triassic granites were mainly originated from the Neoproterozoic sedimentary and igneous rocks. •
From the 1930s–60s, the Iraq Petroleum Company conducted exploration in the Hadramawt and Mahrah areas in north-east Yemen, during which period Ziad Rafiq Beydoun (1924–1998) pioneered geological studies of the country. In 1962 and 1967, respectively, two separate states, pro-West North Yemen and pro-Soviet South Yemen, were formed.
The South China Block (SCB) consists of the Yangtze Block in the northwest and the Cathaysia Block in the southeast, separated by the NE-striking Jiangshan–Shaoxing Fault (Fig. 1; Qin et al., 2022, Zhao et al., 2023).The early Paleozoic orogenic belt in South China can extend up to 2000 km in a northeast direction, with an approximate range of orogenic …
Mineral chemistry and geochemical aspects of Gebel Filat granites, South Eastern Desert, Egypt ... analyses and chemical formulae of plagioclase and K-feldspars from Gebel Filat granite and pegmatite Rock type Filat granite Minerals Plagioclase Sample No. 5 SiO2 Al2O3 TiO2 FeOt MnO MgO CaO Na2O K2O 69.32 18.98 0.00 0.01 0.01 0.00 0.49 10.25 0. ...
A-type granites have been extensively studied since the term was introduced by Loiselle and Wones (1979), because of their unusual compositions and tectonic settings (e.g. Collins et al., 1982, Whalen et al., 1987, Creaser et al., 1991, King et al., 1997, Bonin, 2007).However, the genesis of A-type granites is still a matter of debate, and a number of …
The aluminous granites do not contain any alkali mafic silicate minerals. All the A-type granite plutons intrude into Devonian and Carboniferous volcani-sedimentary sequences. ... and rare-earth-element compositions of peralkaline granites and dykes from Ulungur River area of North Xinjiang, China — South-Tasigake granite, Lunanbei granite ...
The Zhuguangshan complex, a ca. 4000 km 2 granitic batholith in the Guangdong Province of South China, hosts some of significant uranium ore fields such as the Changjiang, Baishun, Chengkou, and Lanhe. Uranium deposits in this complex are mainly associated with the Youdong, Changjiang, and Baiyun granites, whereas the uranium mineralization has not been …
Company Details. Business Type : Trading Company Location : RoY, Yemen Year Established : 1995 Number Of Employees : 11 - 50 People Export Percentage : Production Lines : R&D Staff : Total Annual Revenue : Below US$1 Million Main Markets : North America,South America,Western Europe,Eastern Europe,Eastern Asia,Southeast Asia,Mid …
represents an anorogenic granite pertaining to the A-type, formed in a within-plate environment under an extensional tectonic setting pertaining to rift-related granites. Key words A-type granite; Yemen Republic; Arabian Nubian Shield; Red Sea rifting; within plate granite 1 Introduction The Arabian Peninsula is structurally a part of the
This granite body is characterized by high alkali (8.7%–10.13%), high-field strength elements (HFSE), but low Sr and Ba and high Zn contents. The abundance of xenoliths from the …
unlocking the mineral wealth of Somaliland and fostering regional development. Keywords:- Mineral, Potential, Base Metals, Somaliland. I. INTRODUCTION Somaliland is located on the northern side of the Horn of Africa, bordering the Gulf of Aden to the north, Somalia to the east, Ethiopia to the south and west, and Djibouti to the northwest.
Miocene-Oligocene A-type granite intrudes the eastern side of the Red Sea margin within the zone of extension from Jiddah, Saudi Arabia south to Yemen. The intrusions developed in the …
Miocene-Oligocene A-type granite intrudes the eastern side of the Red Sea margin within the zone of extension from Jiddah, Saudi Arabia south to Yemen. The intrusions developed in the early stages of continental extension as Arabia began to move slowly away from Africa (around 30-20 Ma). Within the narrow zone of extension silicic magmas formed dikes, sills, small …
The geology of Yemen is promising for metallic and industrial minerals and there are ample deposits of natural stones in the country. However, with the exception of a relatively artisanal
A-type granites have attracted increasing attention in recent years for their significance in supercontinent evolution. These granites are commonly found in the late Paleoproterozoic orogenic belts and are also prevalent in the Mesoproterozoic period within ancient cratons (e.g., Condie et al., 2023, Dall'Agnol et al., 2012). A thorough study ...
The Cenozoic rift basins are related to the separation of Arabia from Africa by the opening of the Red Sea to the west and the Gulf of Aden to the south of Yemen during the …
High silica (SiO 2 > 70 wt%) granites (HSGs) are generally hypothesized to form by crystal-liquid segregation at the tops of felsic bodies in the shallow crust (Lee and Morton, 2015).The HSGs represent the residual melt extracted from a crystal-rich mush through multiple processes (Bachmann and Bergantz, 2004), including hindered setting in the dense liquid …
Miocene-Oligocene A-type granite intrudes the eastern side of the Red Sea margin within the zone of extension from Jiddah, Saudi Arabia south to Yemen. The intrusions …
The North Qinling (NQ) orogen includes extensive Devonian magmatic rocks (Wang et al., 2013), primarily consisting of I-type granites with fairly lower A-type granite proportions (Han et al., 2021; Ren et al., 2021).Some I-type granites exhibit similar geochemical characteristics to those of adakites (Qin et al., 2020).Based on previous studies, Devonian …
It is bounded by the European and Siberian cratons to the north and Tarim and North China cratons to the south, and was formed by amalgamation of juvenile terranes (e.g., island arc, ophiolite, and accretionary wedge) and continental fragments (e.g., Şengör et al., 1993, Windley et al., 2007, Xiao et al., 2018; Fig. 1a).
Generation of A-type granites may have involved partial melting of crustal materials of tonalitic–granodioritic composition (Creaser et al., 1991), but much of them seem to be a direct result of melting of `young' or short-lived metaigneous rocks, as exemplified by the Proterozoic anorogenic granites of North America (Anderson, 1983; Anderson ...
The Precambrian basement of northern Yemen was first divided by Geukens (1960, 1966) into three units: mica-schist with granite intrusions in the southeast, granite with …
Tertiary anorogenic granites of the western border of the Yemen Plateau. Lithos, 20: 433-444. North Yemen (Y.A.R.) was affected, from 30 to 20 Ma ago, by intense magmatic activity (Trap …
More importantly, similar to typical more mafic S-type granites from the Cape Granite Suite (South Africa) and north Queensland (Australia), the high and variable FeO T + MgO contents (2.21–6.64 wt%) are significantly attributed to coupled co-entrainment of peritectic and accessory minerals (e.g., garnet, ilmenite, zircon, and monazite ...
Here, we report the occurrence of variably organized nanoparticles of Ce-poor (<0.2 wt%), Nd-Y-rich bastnäsite-(La), and associated cerianite in parental granites from a HREE deposit, South China. The mineral contains high-HREE abundances (up to 13 wt% Y 2 O 3). Synchrotron radiation-induced X-ray diffraction and high-resolution transmission ...
The Nanling Range is a geographical term, traditionally defining all the mountains on the Guangxi–Guangdong and Hunan–Jianxi borders (approximately longitude 110.0–116.5°E, latitude 23.5–26.5°N); the range extends from west to east for more than 1000 km and from north to south for more than 200 km.Because it consists of the Yuechengling, Dupangling, …
Undeformed, coarse-grained, slightly porphyritic, locally xenolith- bearing pink granites, prominently ex- posed at Gebel Sabrayn, form the centre of the structure. The granite intrudes more...
Lu-Zong volcanic basin is located in the northeastern margin of South China (Fig. 1). In this basin, A-type granites related to uranium mineralization include the Huangmeijian, Dalongshan, and ...
Geochronology of the Nebo Granite, Bushveld Complex F. Walraven and E. Hattingh Laboratory, Geological Survey, Private Bag Xl12, Pretoria 0001, Republic of South Africa Accepted 22 April 1993 Available age determinations of the Nebo Granite of the Bushveld Complex from the published literature are reviewed
to the north and south of North Carolina; and they observe approxi-mate parallelism with each other and with the general trend of the coast line of the southeastern Atlantic states. The granites of North Carolina are distributed over parts of each of these three provinces; the areas being fewer and smaller over the Coastal Plain region, and
