The Paleozoic tectono-metamorphic evolution of the Charters Towers Province, North Queensland, Australia
16
0
0
Full text
(2) Section B. R. Quentin de Gromard. - SECTION B THE SIGNIFICANCE OF E-W STRUCTURAL TRENDS FOR THE ALICE SPRINGS OROGENY IN THE CHARTERS TOWERS PROVINCE, NORTH QUEENSLAND.
(3) Section B. R. Quentin de Gromard. 138o E 12o S. 150o E 12o S. Hodgkinson-Broken River Orogen Greenvale Province Georgetown Block. Charters Towers Province Townsville. Arunta Block Alice Springs Orogeny 450-300 Ma. Mt Isa Block. Harts Range ~ 470 Ma. Thomson Orogen. GSQ Maneroo 1 472.9 +/- 2.7 Ma. Amadeus Basin Alice Springs. AMX Toobrac 1 469.4 +/- 7.7 Ma. Petermann Orogeny ~ 600-520 Ma DIO Adria Downs 1 510.0 +/- 2.8 Ma. Musgrave Block. Anakie Province. AAE Towerhill 1 385.0 +/- 4.6 Ma. Gawler Craton. New England Orogen. PPC Carlow 1 483.6 +/- 5.9 Ma. Curnamona Craton. Sydney Adelaide. Lachlan Orogen Delamerian Orogen 40o S 138o E. Melbourne 40o S 150 E o. 500 km Hobart. Figure 1: Map of the eastern two thirds of Australia showing the Phanerozoic Tasman Orogenic System against the Precambrian craton of Australia to the west along a boundary (the thick line) that ~ marks the Tasman Line. Thin lines are aeromagnetic trends and the open circles show the location of dated samples discussed in text within the Harts Range and the Thomson Orogen. 28.
(4) Section B. R. Quentin de Gromard. ?. ?. ?. Georgetown Block. Greenvale Province Charters Towers Province. Arunta Block. Mt Isa Block 1670-1500 Ma. Anakie Inlier ~500 Ma. Petermann Orogen ~600 - 520 Ma. Musgrave Block Grenville Orogen 1300-1000 Ma. ?. ?. Alice Springs Orogen 450 - 300 Ma. Gawler Craton >1540 Ma. ?. ? ?. New England Orogen 310 - 210 Ma. ?. Lachlan Orogen 450 - 340 Ma Delamerian Orogen 520 - 490 Ma. Figure 2: Aeromagnetic map of Australia (Milligan & Franklin, 2004; Magnetic Anomaly Map of Australia (fourth Ed.), 1:5 000 000, Geoscience Australia, Canberra.) showing major truncational trends associated with successively developed orogens. Note the truncation of relics of PreCambrian N-S grain in the Mount Isa Block by the 500 to 300 Ma W-E trends from central Australia to the East coast.. 29.
(5) Section B. R. Quentin de Gromard. Balcooma145°E Metavolcanics. 144°30'E. Georgetown Block. 145°30'E. 146°E. ±. 146°30'E. Broken River Province. Greenvale Province. 19°S. 19°S. Townsville. lt Fau r e v Clarke Ri. 19°30'S. 19°30'S. Burdekin Basin. Charters Towers Province Ravenswood Batholith. Reedy Springs Batholith. 20°S. Charters Towers. 20°S. Fig.4b Lolworth Batholith 0. 12.5 25. 50 Km Cape River metamorphics 144°30'E. Fault Alex Hill Shear Zone. Sedimentary Rocks. Fig.4a. Thalanga. Seventy Mile Range Group. 145°E. 145°30'E. Granitoids. 146°E. 146°30'E. Metamorphic Rocks. Silurian - Devonian. Cambro - Ordovician Metavolcanics. LateDev-EarlyCarb. Silurian. Neoproterozoic - Cambrian. Ordovician - Devonian. Ordovician - Devonian. Paleoproterozoic - Mesoproterozoic. Figure 3. The Townsville Hinterland showing the eastern Georgetown block, the Greenvale, the Broken River and Charters Towers Provinces, the distribution of granitoids and metamorphic rocks and the location of the Balcooma Metamorphics. Rectangles show location of Figs. 4a and 4b.. 30.
(6) Section B. R. Quentin de Gromard. 145°42'0"E. 20°17'0"S. 145°43'0"E. 145°44'0"E. 145°45'0"E. ±. 77 83. 78. 84 85. 79 80 81. 87 88 86 29 30. 31. 89. 21 26. 20°18'0"S. 27 25. 15 14 13. 5 6 7 8 9 10. 12. F li. 2. ay hw g i sH n de r. 4. 20°19'0"S. 0. 0.5. 1 km. 20°17'0"S. 76 50. 87. ±. 88 80 65 81 70 86. 85 65. 89. 75. 86. 80 56. 20°18'0"S. 75 89 79. 80 81 86 70. 76. F lin. 85 73. w igh H s r e d. ay. 57. 20°19'0"S. 0. 0.5. 145°42'0"E 4 73. Sample number Main foliation Fault Creek. 1 km 145°43'0"E. Quaternary Alluvium. Late Tertiary - Quaternary Campaspe Formation. Mid ordovician? Mt Glengalder granite. 145°44'0"E. 145°45'0"E. Late Cambrian? - Early Ordovician? Shovel Creek complex. Cambrian - Ordovician Trooper Creek Formation Mt Windsor volcanics Puddler Creek Formation. Figure 4a: Location of the samples (numbers are prefixed by rq in text) used for FIA measurements (top) and main foliation trends (bottom) from within the porphyroblastic portion of the Puddler Creek Formation in the Thalanga region. Location is shown on Fig. 3.. 31.
(7) Section B. o. 20 03'00"S. R. Quentin de Gromard. 146o14'30"E. 146o15'00"E 53 rq92. ±. 58. rq91. 0. 250. rq96 75. 20o03'30"S. 500 m. Creek Sample number Main foliation. Silurian - Devonian 75. Millchester Creek Tonalite. 66 rq51 64 rq50 rq49 rq47 87 rq101. Cambrian - Ordovician. 86. Buchland Hill Diorite. 75 54. 86 65 76. o. 20 04'00"S. 53. rq100 rq99 rq97 34 rq96 rq94 31 rq93. Neoproterozoic - Cambrian Calc - Silicate Quartzite and Marble Cordierite Schist. Charters Towers Metamorphics. Figure 4b: Location of the samples used for FIA measurements within the Charters Towers Metamorphics in the Charters Towers region and the main foliation trends. Location is shown on Fig. 3.. 32.
(8) Section B. (a). rq79. R. Quentin de Gromard. 120. 1mm. 120. (b). 1mm. rq79. (c). 150. (d). 150. rq8. 1mm. rq8. 1mm. Figure 5: Photomicrographs and line diagrams showing examples of inclusion trails preserved within cordierite pseudomorphs. The porpyroblasts have been totally pinitized. Those in sample rq79 only preserved a single anticlockwise asymmetry while in sample rq8, inclusion trails from core to rim both show anticlockwise asymmetry. Vertical thin section. Single barbed arrow show strike and way up. Plane polarized light.. Continues on next page. 33.
(9) Section B. (e). rq10 (g). rq30. R. Quentin de Gromard. 60. 1mm 30. 0.5mm. (f). rq10 (h). rq30. 60. 1mm 30. 0.5mm. Figure 5: Photomicrographs and line diagrams showing examples of inclusion trails preserved within cordierite pseudomorphs. The porphyroblasts have been totally pinitized. Inclusion trails from core to rim both showing clockwise asymmetry. Vertical thin sections. Single barbed arrows show strike and way up. Plane polarized light.. 34.
(10) Section B. R. Quentin de Gromard. (a). 30. (b). 30. rq21. 1mm. rq21. 1mm. (c). 0. (d). 0. rq13. 0.5mm. rq13. 0.5mm. Figure 6: Photomicrographs and line diagrams showing inclusion trails preserved within cordierite pseudomorphs. The porphyroblasts have been totally replaced by coarse grain chlorite and white mica. Both porphyroblasts in sample rq21 and rq13 only preserve a single clockwise asymmetry. Vertical thin sections. Single barbed arrow shows strike and way up. Plane polarized light.. 35.
(11) Section B. (a). rq21. R. Quentin de Gromard. 60. 1mm. (b). rq21. 60. 1mm. (c). 0. (d). 0. rq77. 0.5mm. rq77. 0.5mm. (e). 90. (f). 90. rq77. 1mm. rq77. 1mm. Figure 7: Photomicrographs and line diagrams showing inclusion trails preserved within andalusite pseudomorphs. The porphyroblasts have been partially to totally replaced by a fine grain white mica aggregate. The porphyroblast in sample rq21 only preserves a single clockwise asymmetry while in sample rq77 inclusion trails differ from core to rim. Vertical thin sections. Single barbed arrow shows strike and way up. Plane polarized light.. 36.
(12) Section B. (a). rq8 (c). rq8. R. Quentin de Gromard. 90. 1mm 120. 1mm. (b). rq8 (d). rq8. 90. 1mm 120. 1mm. Rim FIA @125o +/- 5. Continues on next page. 37.
(13) Section B. R. Quentin de Gromard. Rim FIA @125o +/- 5 (e). rq8. 130. 1mm. (f). rq8. 130. 1mm. Core FIA @135o +/- 5 (g). rq8. 140. 1mm. (h). rq8. 140. 1mm. (i). 150. (j). 150. rq8. 1mm. rq8. 1mm. Figure 8: FIA measurement technique shown on pseudomorphs after cordierite for sample rq8. The FIA for both core and rim is located where the inclusion trails asymmetry switch occurs from clockwise to anticlockwise. Vertical thin sections. Single barbed arrow shows strike and way up. Plane polarized light.. 38.
(14) Section B. sample rq002 rq004 rq005 rq006 rq007 rq008 rq009 rq010 rq012b rq012c rq013a rq013b rq014 rq015 rq021 rq025 rq026 rq027 rq029 rq030 rq031 rq057 rq062 rq063 rq074 rq077 rq078 rq079 rq080 rq081 rq083 rq084 rq085 rq086 rq087 rq088 rq089. R. Quentin de Gromard. single FIA. cordierite core median. rim. 130 165 135. 105 130 105. 135 105 145. 125 55 65. andalusite single FIA core 145. rim 105. 85. 135. 135 125 85 135. 85 105. 85. 125. 85 105 130 35. 105. 105. 65. 85. 105. 125 120 125 125 95 125 55 55 85 90 35 65 60 60 65 145 125 125. 30 30. 30 30 30. Table 1. List of FIA measurements for cordierite and andalusite porphyroblasts from rocks of the Puddler Creek Formation in the Thalanga region. Single FIA represents only one stage of porphyroblast growth from the one sample. Multiple porphyroblasts growth produces multiple FIAs within one sample recorded within the core, median and rim of the porphyroblasts.. 39.
(15) Section B. R. Quentin de Gromard. Total FIA N 15 10 5. a). b). N = 56. Andalusite FIA. Cordierite FIA. N. N. 40. 20. 20. 10. N = 10. c). N = 46. Figure 9: Equal-area rose diagrams showing the FIA trends measured in andalusite and cordierite porphyroblasts from within rocks from the Puddler Creek Formation (Thalanga region). a) FIA trends measured from both andalusite and cordierite porphyroblasts, b) FIA trends measured from andalusite porphyroblasts and c) FIA trends measured from cordierite porphyroblasts.. 40.
(16) Section B. R. Quentin de Gromard. sample rq047 rq049 rq050 rq051 rq091 rq092 rq093 rq094 rq096 rq097 rq099 rq100 rq101. cordierite single FIA core 145 60 135 135 90 45 115 140 140 150 135 105 150. rim 65. 95. 105 45 70. 60. Table 2. List of FIA measurements for cordierite porphyroblasts from rocks of the Charters Towers Metamorphics in the Charters Towers region. Single FIA represents only one stage of porphyroblast growth from the one sample. Multiple porphyroblasts growth produces multiple FIAs within one sample recorded within the core, median and rim of the porphyroblasts.. 41.
(17)
Figure
+7
Related documents
This Service Level Agreement (SLA or Agreement) document describes the general scope and nature of the services the Company will provide in relation to the System Software (RMS
de Klerk, South Africa’s last leader under the apartheid regime, Mandela found a negotiation partner who shared his vision of a peaceful transition and showed the courage to
As I will demonstrate, the problem raised by Pound in his 1910 paper is virtually identical to the one Kelsen tried to solve a few decades later: how to build a legal science
Note: if you want to burn your current movie production to a disc right away, go directly to the Create Disc module. In the Create Disc module you can create a disc menu, produce
Howel die poging om die lewe van Jesus van Nasaret te rekonstrueer, volgens MachoveC (1976:41) baie moeilik en selfs onriloontlik is, word die historiese Jesus deur.. hom
Influence of chronic obstructive pulmonary disease on postoperative lung function and complications in patients undergoing operations for primary non-small cell lung cancer.
Named in memory of Conall 6 Fearraigh, a Donegal singer, it was for amhranafocht gan tionlacan nach sean-nos f (unaccompanied singing which is not sean-nos). This was meant to
Since the main way for families to enhance their material well-being is by allocating more of their time to paid employment which means invariably less home time spent with
