title: Post-Triassic thermal history of the Tazhong Uplift Zone in the Tarim Basin, Northwest China: Evidence from apatite fission-track thermochronology

authors: Xiang, Caifu

subjects: Apatite fission track

abstract: The Tarim Basin is a representative example of the basins developed in the northwest China that are characterized by multiple stages of heating and cooling. In order to better understand its complex thermal history, apatite fission track (AFT) thermochronology was applied to borehole samples from the Tazhong Uplift Zone (TUZ). Twelve sedimentary samples of Silurian to Triassic depositional ages were analyzed from depths coinciding with the apatite partial annealing zone (∼60-120 °C). The AFT ages, ranging from 132 ± 7 Ma (from a Triassic sample) to 25 ± 2 Ma (from a Carboniferous sample), are clearly younger than their depositional ages and demonstrate a total resetting of the AFT thermometer after deposition. The AFT ages vary among different tectonic belts and decrease from the No. Ten Faulted Zone (133-105 Ma) in the northwest, the Central Horst Zone in the middle (108-37 Ma), to the East Buried Hill Zone in the south (51-25 Ma). Given the low magnitude of post-Triassic burial heating evidenced by low vitrinite reflectance values (Ro < 0.7%), the total resetting of the AFT system is speculated to result from the hot fluid flow along the faults. Thermal effects along the faults are well documented by younger AFT ages and unimodal single grain age distributions in the vicinity of the faults. Permian-early Triassic basaltic volcanism may be responsible for the early Triassic total annealing of those samples lacking connectivity with the fault. The above arguments are supported by thermal modeling results.

text: Post-Triassic thermal history of the Tazhong Uplift Zone in the Tarim Basin, Northwest China: Evidence from apatite fission-track thermochronology The Tarim Basin is a representative example of the basins developed in the northwest China that are characterized by multiple stages of heating and cooling. In order to better understand its complex thermal history, apatite fission track (AFT) thermochronology was applied to borehole samples from the Tazhong Uplift Zone (TUZ). Twelve sedimentary samples of Silurian to Triassic depositional ages were analyzed from depths coinciding with the apatite partial annealing zone (∼60-120 °C). The AFT ages, ranging from 132 ± 7 Ma (from a Triassic sample) to 25 ± 2 Ma (from a Carboniferous sample), are clearly younger than their depositional ages and demonstrate a total resetting of the AFT thermometer after deposition. The AFT ages vary among different tectonic belts and decrease from the No. Ten Faulted Zone (133-105 Ma) in the northwest, the Central Horst Zone in the middle (108-37 Ma), to the East Buried Hill Zone in the south (51-25 Ma). Given the low magnitude of post-Triassic burial heating evidenced by low vitrinite reflectance values (Ro < 0.7%), the total resetting of the AFT system is speculated to result from the hot fluid flow along the faults. Thermal effects along the faults are well documented by younger AFT ages and unimodal single grain age distributions in the vicinity of the faults. Permian-early Triassic basaltic volcanism may be responsible for the early Triassic total annealing of those samples lacking connectivity with the fault. The above arguments are supported by thermal modeling results.

year: 2013

title: The return to initial public offerings: A Sino-Indian comparison

authors: Locke, Stuart

subjects: IPO returns

abstract: The ability of entrepreneurs and other promoters of start-up businesses to exit through an initial public offering is an important component of a mature capital market. The returns on initial public offerings (IPOs) on the Shanghai and Bombay stock exchanges over a 14-year period to May 2007 are analysed in this paper. Consideration is given to the medium to longer-term returns accruing to the new listings. The focus is not on initial subscribers' gains or losses on listing but rather on the extent to which new listings continue and generate at least normal returns. The two emerging economies considered have differing political, legal and economic systems and exhibit significantly different return patterns.

text: The return to initial public offerings: A Sino-Indian comparison The ability of entrepreneurs and other promoters of start-up businesses to exit through an initial public offering is an important component of a mature capital market. The returns on initial public offerings (IPOs) on the Shanghai and Bombay stock exchanges over a 14-year period to May 2007 are analysed in this paper. Consideration is given to the medium to longer-term returns accruing to the new listings. The focus is not on initial subscribers' gains or losses on listing but rather on the extent to which new listings continue and generate at least normal returns. The two emerging economies considered have differing political, legal and economic systems and exhibit significantly different return patterns.

year: 2009

title: The cultural perspective: Lakeweed and pest animals

authors: Douglas, Nicki

abstract: I have been with the Department of Conservation for about 15 years now and worked in Rotorua for 11 of those 15 years in various roles. I was lucky enough to be the Operations Manager for Lake Tarawera so I have a very strong association from a practitioner perspective. Practitioner is probably the key word for me. Most of my korero today will be based on experience and practice in working with communities and that is my area of expertise. I will talk about collective impact. It does say that I am talking about lake weeds and pests and I will mention them at least twice.

text: The cultural perspective: Lakeweed and pest animals I have been with the Department of Conservation for about 15 years now and worked in Rotorua for 11 of those 15 years in various roles. I was lucky enough to be the Operations Manager for Lake Tarawera so I have a very strong association from a practitioner perspective. Practitioner is probably the key word for me. Most of my korero today will be based on experience and practice in working with communities and that is my area of expertise. I will talk about collective impact. It does say that I am talking about lake weeds and pests and I will mention them at least twice.

year: 2017