.... Copper is leached from poorly sorted first-cycle clastic sediments of footwall redbeds, associated meta/volcanics of the Raialo Group and basement rocks during their progressive diagenetic alteration by moderate-temperature oxygen rich brines. Ore mineral zoning from chalcocite to pyrite in the Bhudoli...

...S. P. Singh Abstract The Bayana graben contains over 3000m thick volcano-sedimentary sequence classified into the Raialo, the Alwar, and the Ajabgarh Groups of the Delhi Supergroup. The sedimentary pile consists of several sedimentary facies of fluvial to marginal marine environments. The volcanics...

... Ajabgarh (~500m) groups separated by unconformities has been proposed ( Singh, 1982 ). The presence of basalts and volcaniclastic material and tuff in ~18 flows with a composite thickness of ~1000 m in the Raialo’s has been recorded ( Bannerjee and Singh, 1977 ). A very weak metamorphism was indicated...

...: the Raialo, the Alwar, and the Ajabgarh. The Jahaj-Govindpura Volcanics(JGV), constituting the younger subdivision of the Raialo Group, is spread over an area of about· 100 km2 between Nithar and Khareri (Fig. 1), and attains a maximum thickness of 1000 m in Ker-Jahaj section. It is composed of basaltic...

... with the BGC. RAIALO SERIES The Raialos, formerly regarded as a basal formation of the Delhi system, and composed of dolomitic marble as the dominant meInber with occasional basal grit and arkose, bitotie schist and phyllite, is now recognized by Heron as an independent group. According to him (1953) definite...

...Fig. 2. Field photographs showing the outcrop features of the Northern Delhi Supergroup: ( a ) pelitic rocks of the Raialo Group unconformably overlying Archaean granite; ( b ) massive grey arenitic rocks with thin layer of reddish pelitic rocks, Alwar Group; ( c ) straight ripple marks...

..., Udaipur, Zawar and Dungarpur areas, PRECAMBRIANS OF RAJASTHAN 645 which were earlier considered by Heron (1925) as constituting the Raialo, are now grouped under the AravaIJis as they represent a continuous sequence. The overlying Delhi Super group of rocks extend from near Delhi in the northeast...

...P. K. Gangopadhyay; Amitava Lahiri Abstract The lithostratigraphic units of the Delhi Supergroup are well exposed around Barr (26° 05': 74° 06'). Field, petrographic and geochemical observations from these units suggest that the lithofacies changes from lower arenaceous Alwar Group with basal...

... schists, quartzites Basal arkose-grits Raialo Group Garnet-biotite schist. Raialo (Raj nagar) marble Basal grit Aravalli orogeny and granitlsation (2000 m.y.) Aravalli} Phy:llites, limestones, quartzites and composite S~.uper gneisses, Basal quartzites, grits and conglomerates Group Thick volcanics (2550...

..., with occasional mica schist, are present in the migmatites representing the Banded Gneissic Complex. The main quartzite and the amphibolite adjacent to it have been included by Heron in the Aravalli System, while the other rocks in the core have been grouped under the Raialos. The migmatite in the north-eastern...

... granite" (Ajmer Granite) C P @ h w e r ~roterozoic Raialo Series Ajmer Formation Anasagar migmatites Aravalli Super Aravalli (2.5 to 1.6Ga) hup Super Group Archaem (>2.5 Cia) Banded Gneissic Complex Banded Gneissic Complex .p !? * ** Main Delhi Syclinoriumof Heron 1953; Ajmer-PindwaraFold Belt of Sen...

... schist, west of Rajnagar marble band has been grouped as Raialo Series by Heron. The rock shows imprints of two phases of folding. The metamorphic minerals present in the rock have been dated with respect to the two phases of folding. The dating reveals that the thermal peak of metamorphism was attained...

... (1.7-1.0 Ga) from Vindhyan basin-VB (1.6 Ga) and in the west by an unconformity (conglomerate) between Delhi rock (1.7-1.0 Ga) and granites and gneiss of Archean age (Singh, 1982b). The Delhi Supergroup (1.7-1.0 Ga) in northeastern Rajasthan consists of the Raialo, Alwar and Ajabgarh Groups underlying...

... of the Aravalli and Delhi supergroups, and the Raialo Group, respectively (Heron, 1953 ; Sinha-Roy, Malhotra & Mohanty, 1998 ). The basement, namely the Banded Gneissic Complex, is mainly exposed in two sectors in the state of Rajasthan: (1) the southern sector to the east and southeast of Udaipur, and (2...

... Supergroup Alwar Group Conglomerate, arkose, quartzites & amphibolite Raialo Group Quartzites, limestones, marbles and conglomerates Aravalli Supergroup Phyllite, schists, greywackes, carbonaceous-phyllites and mylonites. Archaean Basement Granitic gneisses, schists and amphibolites...

.... INTRODUCTION The Precambrian rocks of Kama-Masind-Fatehpur-Kathar belt (Fig. 1) in the Udaipur district, south central Rajasthan, belong to the Aravalli Group. Around Kathar (24°53'N: 73°35'E), these are represented by marble (siliceous, 'sandy' limestone of Heron, 1953, p. 123), quartzite, and phyllite...

... million years as shown by radiometric determinations, have been classified broadly into 8 age groups and standard names have been suggested for each of the groups. Copyright © 1964 Geological Society of India 1964 Geological Society of India THE ARCHAEAN PROVINCES OF INDIA AND THEIR COMPARISON...

... sequence along with minor volcanics belonging to the Alwar and Ajabgarh Groups of the Delhi Supergroup. The rocks of the Raialo Group, the basal unit of the Delhi Supergroup, are not exposed in the study area. 0016-7622/85/26-10-726/$ 1.00 © Geol. Soc. India GRANITE EMPLACEMENT-DELHI SUPERGROUP DELHI...