1 The metallogenic ages are the lower and upper Proterozoic Subera, late and earlier Palaeozoic Era, Mesozoic Era, with Devonian Period as an important metallogenic era.

2 The Qinling Group of Lower Proterozoic is an advantageous environment for metallogenesis and the ductile shear zone is a major structure to control rocks and ores.

3 The Proterozoic climate was still warm and wet, but compared with that of the Archaeozoic Eon, the temperature fell a little.

4 Proterozoic is feral planting often is to grow in crows, rarely and insect pests is invaded.

5 Probably formed in Early Proterozoic, it was rejuvenated repeatedly in late stage.

6 The mother rock derived form Archaean and Early Proterozoic metamorphic rock from the north-east part of Ordos Basin.

7 Since the Middle Proterozoic, metazoan trace fossils must have undergone an irreversible evolution from simple to complicated,[] and from lower to higher in quality.

8 Late Archean and Early Proterozoic were the main period for the formation of continental crust.

9 In recent years, Proterozoic and Archaeozoic buried hill reservoirs have been explored and developed in Liaohe Oilfield, but it is a problem to interpret these fracture-cavity reservoirs.

10 Before Later Proterozoic era , in this area more than two times of thermodynamic metamorphism took place.

11 The lower Proterozoic Badu Group is one of the oldest metamorphic rock series in the continental margin of Southeast China, and is an integral part of the early Precambrian Zhejiang-Fujian craton.

12 The early Proterozoic atmosphere and hydrosphere are similar to those of Archaeozoic in being still absent in oxygen.

13 The middle Proterozoic crystalline schist series in the Panzhihua - Xichang region has undergone progressive regional metamorphism.

14 Professional advice and on-the-job training was provided to two field parties working on late Proterozoic volcanic-ophiolite-granite rocks in the South-eastern desert.

15 The country rock of the orebody are dolomites of Gaoyuzhuang Formation ( Middle Proterozoic era ) .

16 The ore bed hosts in boracic granulite of Lieryu formation, Liaohe group of lower proterozoic.

17 Dense Au deposit zone is located in the suture between Archaeozoic Zhongchao ancient land plate and Proterozoic Mongoliasea plate , controlled by NW Fuerhe and Gudonghe lithosphericfractures.

18 In the research area, the primary surface formation are the Archeozoic — Proterozoic Jiaonan group there are kinds of Clastic rocks and Volcanic rocks in the metamorphite and Mesozoic Cretaceous.

19 They indicate that the Archeozoic tectonic environment is continental nucleus development and crustal block formation, and the Early Proterozoic t...

20 A simulation experiment was made on kerogen from shales in the lower Xiamalin Formation of the Proterozoic in North China.

21 They indicate that the Archeozoic tectonic environment is continental nucleus development and crustal block formation, and the Early Proterozoic tectonic environment is represented as rift.

22 In the end, the relation between the metallogenesis and the evolution of Archaeozoic and Early Proterozoic earth crust is discussed basing upon the theory of rift.

23 Paleo-microphytes of the study area include 20 genera and 33 kinds, the characteristic fossils and the fossil assemblages could be correlated to that of Middle Proterozoic in Jixian County nearby.

24 The early Precambrian in Jilin province includes the Archaeozoic granite-greenstone belt, early Proterozoic Ji'an Group and mid Proterozoic Laoling Group .

25 According to analysis of sedimentary characters and geochemistry characters of Luanchuan Group of New Proterozoic Era.

26 ChronologyThe data of chronology explanates that both of them are belong to Proterozoic Era.

27 Boron deposits of eastern Liaoning occur in a suite of Early Proterozoic metamorphic rocks, with boron orebodies existent in magnesian marble.

28 Dating from the Eocene Epoch, the crater is likely less than 50 million years old, but the impact bored into Proterozoic sandstones well over 500 million years old.

29 Various hydrocarbon migration paths towards these special reservoirs involve unconformable surface, fault surface, s4 and s3 sandstones, and Proterozoic interior laminar formation.

30 Wengquangou boron - iron deposit occurred within the rocks of Lieryu Formation in Liaohe Group, early Proterozoic.

31 Uranium mineral is pitchblende which was formed in Lower Proterozoic.

32 Being situatedmaster pull down the thin slice shape quartzite constituting in consisting of early Proterozoic Era tiny particles group away the middle scabbard shape of fault brining .

33 The studies of microelement, rare earth element and isotope compositions that the Huogeqi polymetallic ore field was formed in rift basin of back arc continental marging during Proterozoic Era.

34 The Middle Proterozoic granitoids was an intraplate type produced in transitional crystalline basement before plate collision.

35 The Proterozoic and Palaeozoic are two main metallogenic periods in the region.

36 The history of Earth is divided into four eons — starting with the earliest, these are the Hadean, Archean, Proterozoic,[http:///proterozoic.html] and Phanerozoic.

37 As only one kind of fossil in Proterozoic, stromatolite is an important material in the paleogeography changing study.

38 The major structure in the area is the NE-NNE folded belt consisting of Banxi Group of the Middle Proterozoic era to the Ordovician system of the Early Paleozoic era.

39 Wangjiawaizi gold deposit occurs in Lower Proterozoic opimetamorphic rock series.

40 Metamorphic basement of the jiangnan Proterozoic Paleo - island arc mainly consists of low - grade metamorphic volcanic sedimentary rocks.

41 This type of graphite deposits were formend in the Late Archaean to Early Proterozoic.

42 Ankerite microclinite, a special type of rock, is closely related to the ore-forming process of massive sulfide deposits in the East Liaoning Proterozoic rift.

43 VMS mineralization , occurred in the middle Proterozoic era, formed cupriferous source bed.

44 Within the belt , the mid-late Proterozoic (epimetamorphic) green- schists were ovethrust from south to north onto the late Paleozoic granitic batholith at a low angle.

45 Pyrites in Dianfang gold deposit of Proterozoic explosive breccia type are mainly gold - bearing minerals.